AE Techron 2120 User manual

Category
Audio amplifiers
Type
User manual

This manual is also suitable for

2110/2120/7794MRL
Operators Manual
Gradient Ampliers
574.295.9495 | www.aetechron.com
2507 Warren Street, Elkhart, IN 46516
Three-Year, No-Fault Warranty
SUMMARY OF WARRANTY
AE TECHRON INC., of Elkhart, Indiana (Warrantor)
warrants to you, the ORIGINAL COMMERCIAL PUR-
CHASER and ANY SUBSEQUENT OWNER of each
NEW AE TECHRON INC. product, for a period
of three (3) years from the date of purchase, by
the original purchaser (warranty period) that the
product is free of defects in materials and work-
manship and will meet or exceed all advertised
specications for such a product. We further war-
rant the new AE Techron product regardless of
the reason for failure, except as excluded in the
Warranty.
ITEMS EXCLUDED FROM WARRANTY
This AE Techron Warranty is in eect only for failure
of a new AE Techron product which occurred within
the Warranty Period. It does not cover any product
which has been damaged because of any intentional
misuse, or loss which is covered under any of your
insurance contracts. This warranty does not extend
to any product on which the serial number has been
defaced, altered, or removed. It does not cover dam-
age to loads or any other products or accessories
resulting from AE TECHRON INC. product failure. It
does not cover defects or damage caused by the use
of unauthorized modications, accessories, parts, or
service.
WHAT WE WILL DO
We will remedy any defect, regardless of the reason
for failure (except as excluded), by repair or replace-
ment, at our sole discretion. Warranty work can only
be performed at our authorized service centers or at
our factory.
Expenses in remedying the defect will be borne by
AE TECHRON INC., including one-way surface
freight shipping costs within the United States.
(Purchaser must bear the expense of shipping the
product between any foreign country and the port of
entry in the United States and all taxes, duties, and
other customs fees for such foreign shipments.)
HOW TO OBTAIN WARRANTY SERVICE
When you notify us or one of our authorized service
centers of your need for warranty service, you will
receive an authorization to return the product for
service. All components must be shipped in a factory
pack or equivalent which, if needed, may be obtained
from us for a nominal charge. We will take corrective
actions and return the product to you within three
weeks of the date of receipt of the defective prod-
uct, or will make available to you a product of equal
or better performance on temporary loan until your
product can be repaired or replaced and returned to
you. If the repairs made by us are not satisfactory,
notify us immediately.
DISCLAIMER OF CONSEQUENTIAL AND
INCIDENTAL DAMAGES
You are not entitled to recover from us any conse-
quential or incidental damages resulting from any
defect in our product. This includes any damage to
another product or products resulting from such a
defect.
WARRANTY ALTERATIONS
No person has the authority to enlarge, amend, or
modify this warranty. The warranty is not extended by
the length of time for which you are deprived of the
use of this product. Repairs and replacement parts
provided under the terms of this warranty shall carry
only the unexpired portion of this warranty.
DESIGN CHANGES
We reserve the right to change the design of any
product from time to time without notice and with no
obligation to make corresponding changes in prod-
ucts previously manufactured.
LEGAL REMEDIES OF PURCHASER
There is no warranty that extends beyond the terms
hereof. This written warranty is given in lieu of any
oral or implied warranties not contained herein. We
disclaim all implied warranties, including, without
limitation, any warranties of merchantability or tness
for a particular purpose. No action to enforce this
Warranty shall be commenced later than ninety (90)
days after expiration of the warranty period.
This statement of warranty supersedes any others
contained in this manual for AE Techron products.
AE TECHRON INC.
Customer Service Department
2507 Warren St. Elkhart, IN, 46516, U.S.A.
(574) 295-9495
www.aetechron.c
DECLARATION OF CONFORMITY
Technical Construction File Route
Issued By: AE Techron, Inc. For Compliance Questions Only: Larry Shank
2507 Warren Street 574-295-9495
Elkhart, IN 46516 lshank@aetechron.com
This Declaration of Conformity is issued under the sole responsibility
of AE Techron, Inc., and belongs to the following product:
Equipment Type: Industrial Power Amplifiers
Model Name: 2110
EMC Standards:
EN 61326-1: 2013 Electrical equipment for measurement, control and laboratory use
EMC Requirements
EN 55011: 2009 + A1: 2010 Industrial, scientific and medical (ISM) radio-frequency equipment:
Radio disturbance characteristics
Limits and methods of measurement
EN 61000-4-2: 2009 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Electrostatic discharge immunity test
EN 61000-4-3: 2006 + A2: 2010 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Radiated radio-frequency electromagnetic field immunity test
EN 61000-4-4: 2004 + A1:2010 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Electrical fast transient/burst immunity test
EN 61000-4-5: 2006 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Surge immunity test
EN 61000-4-6: 2009 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Immunity to conducted disturbances induced by radio frequency field
EN 61000-4-8: 2010 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Power frequency magnetic field immunity test
Safety Standard:
BSEN61010-1:2010 (inc Corr. May 2011) Safety requirements for electrical equipment for measurement, control, and laboratory use
I certify that the product identified above conforms to the requirements of the EMC Council Directive 2004/108/EC (until 19
th
April, 2016) and Directive
2014/30/EU (from 20
th
April, 2016), and the Low Voltage Directive 2006/95/EC (until 19
th
April, 2016) and Directive 2014/35/EU (from 20
th
April, 2016).
Signed:
Larry Shank Place of Issue: Elkhart, IN, USA
President Date of Issue: March 18, 2016
CE Affixing Date: March 4, 2011
DECLARATION OF CONFORMITY
Technical Construction File Route
Issued By: AE Techron, Inc. For Compliance Questions Only: Larry Shank
2507 Warren Street 574-295-9495
Elkhart, IN 46516 [email protected]
This Declaration of Conformity is issued under the sole responsibility
of AE Techron, Inc., and belongs to the following product:
Equipment Type: Industrial Power Amplifiers
Model Name: 2120
EMC Standards:
EN 61326-1: 2013 Electrical equipment for measurement, control and laboratory use
EMC Requirements
EN 55011: 2009 + A1: 2010 Industrial, scientific and medical (ISM) radio-frequency equipment:
Radio disturbance characteristics
Limits and methods of measurement
EN 61000-4-2: 2009 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Electrostatic discharge immunity test
EN 61000-4-3: 2006 + A2: 2010 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Radiated radio-frequency electromagnetic field immunity test
EN 61000-4-4: 2004 + A1:2010 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Electrical fast transient/burst immunity test
EN 61000-4-5: 2006 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Surge immunity test
EN 61000-4-6: 2009 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Immunity to conducted disturbances induced by radio frequency field
EN 61000-4-8: 2010 Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Power frequency magnetic field immunity test
Safety Standard:
BSEN61010-1:2010 (inc Corr. May 2011) Safety requirements for electrical equipment for measurement, control, and laboratory use
I certify that the product identified above conforms to the requirements of the EMC Council Directive 2004/108/EC (until 19
th
April, 2016) and Directive
2014/30/EU (from 20
th
April, 2016), and the Low Voltage Directive 2006/95/EC (until 19
th
April, 2016) and Directive 2014/35/EU (from 20
th
April, 2016).
Signed:
Larry Shank Place of Issue: Elkhart, IN, USA
President Date of Issue: March 18, 2016
CE Affixing Date: March 4, 2011
DECLARATION OF CONFORMITY
Technical Construction File Route
Issued By: AE Techron, Inc. For Compliance Questions Only: Larry Shank
2507 Warren Street 574-295-9495
Elkhart, IN 46516 [email protected]
This Declaration of Conformity is issued under the sole responsibility
of AE Techron, Inc., and belongs to the following product:
Equipment Type: Industrial Power Amplifiers
Model Name: 7794MRL
EMC Standards:
EN 61326-1: 2013 – Electrical equipment for measurement, control and laboratory use
— EMC Requirements
EN 55011: 2009 + A1: 2010 – Industrial, scientific and medical (ISM) radio-frequency equipment:
— Radio disturbance characteristics
— Limits and methods of measurement
EN 61000-4-2: 2009 – Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Electrostatic discharge immunity test
EN 61000-4-3: 2006 + A2: 2010 – Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Radiated radio-frequency electromagnetic field immunity test
EN 61000-4-4: 2004 + A1:2010 – Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Electrical fast transient/burst immunity test
EN 61000-4-5: 2006 – Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Surge immunity test
EN 61000-4-6: 2009 – Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Immunity to conducted disturbances induced by radio frequency field
EN 61000-4-8: 2010 – Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques:
Power frequency magnetic field immunity test
Safety Standard:
BSEN61010-1:2010 (inc Corr. May 2011) – Safety requirements for electrical equipment for measurement, control, and laboratory use
I certify that the product identified above conforms to the requirements of the EMC Council Directive 2004/108/EC (until 19
th
April, 2016) and Directive 2014/30/EU (from 20
th
April,
2016), and the Low Voltage Directive 2006/95/EC (until 19
th
April, 2016) and Directive 2014/35/EU (from 20
th
April, 2016).
Signed:
Larry Shank Place of Issue: Elkhart, IN, USA
President Date of Issue: April 7, 2020
CE Affixing Date: March 24, 2020
Information subject to change
97-2120001_8-24-2020
2110/2120/7794MR OPERATOR’S MANUALSECTION A
vi
Contents
1 Introduction ....................................................................................................................................8
1.1 Features .............................................................................................................................8
2  Amplier Unpacking and Installation ..............................................................................................9
2.1 Safety First .........................................................................................................................9
2.2  Unpacking ..........................................................................................................................9
2.3 Installation ..........................................................................................................................9
3 Connections and Startup .............................................................................................................10
3.1  Other Operation Modes and Congurations ....................................................................10
3.2  Connecting the Load ........................................................................................................ 10
3.3  Connecting the Input Signal .............................................................................................11
3.4  Connecting the AC Supply ...............................................................................................12
3.5 Start-up Procedure...........................................................................................................13
4  Amplier Operation ......................................................................................................................14
4.1 Front-Panel Controls & Display........................................................................................14
4.2 Back-Panel Controls and Connectors .............................................................................. 20
5  Advanced Conguration ............................................................................................................... 22
5.1 Factory Defaults ...............................................................................................................22
5.2  Accessing the Main Board ...............................................................................................22
5.3  Conguration Settings Located on the Main Board .........................................................22
5.4  Adjusting the Bi-Level Power Supply Switch ...................................................................25
6 Applications ..................................................................................................................................26
6.1 Controlled Current Operation ........................................................................................... 26
6.2  Remote Status and Control using the SIM Interlock I/O Connector.................................30
6.3  Multi-amplier Systems ....................................................................................................34
7 Maintenance ................................................................................................................................38
7.1  Clean Amplier Filter and Grills........................................................................................38
8  Troubleshooting ...........................................................................................................................39
8.1 Introduction & Precautions ............................................................................................... 39
8.2 Visual Inspection ..............................................................................................................39
8.3  No Signal .........................................................................................................................40
8.4 No LEDs Illuminated or No Fans .....................................................................................40
8.5  OverVoltage Warning Message .......................................................................................40
8.6 Standby LED Remains Illuminated ..................................................................................40
8.7  Amplier Overheats (Over Temp Fault Condition) ...........................................................41
8.8 Fault LED is Illuminated ...................................................................................................42
8.9 Factory Service ................................................................................................................42
9  Specications ...............................................................................................................................43
List of Figures
Figure 1.1 – 2110 Front Panel .......................................................................................................8
Figure 3.1 – Closeup of the Output Terminal Resistor .................................................................11
Figure 3.2 – Controlled Voltage Hookup ...................................................................................... 11
Figure 3.3 – Closeup of SIM card ................................................................................................11
Figure 3.4 – Input Select switch functions on the Input Terminals ...............................................12
Figure 3.5 – 208V 3-Phase AC Mains Wiring ..............................................................................12
Figure 3.6 – 380/400/415V 3-Phase AC Mains Wiring ................................................................12
Figure 4.1 – Push Buttons (2110 and 7794MRL models shown) ................................................. 14
Figure 4.2 – Main Status Indicators (2110 and 7794MRL models shown)...................................15
Figure 4.3 – Main Status Indicators for Stand-Alone Ampliers...................................................15
Figure 4.4 – Fault Status Indicators (2110 and 7794MRL models shown) ..................................16
Figure 4.5 – 7794MRL LCD Display and Navigation Buttons ......................................................16
Figure 4.6 – Fault Status Messages for Stand-Alone Ampliers (7794MRL only) .......................17
Figure 4.7 – Main Status Indicators for Multi-Amplier Systems .................................................18
Figure 4.8 – Fault Status Indicators for Multi-Amplier Systems .................................................19
Figure 4.9 – Back Panel Controls and Connectors ...................................................................... 20
Figure 5.1 – Master or Follower Setting ....................................................................................... 22
Figure 5.2 – Gain Trim Control.....................................................................................................23
Figure 5.3 – Controlled-Voltage or Controlled-Current Mode Setting ..........................................23
Figure 5.4 – Compensation Setting .............................................................................................24
Figure 5.5 – Ready/Run Mode or Standby Mode on Power-Up Setting ......................................24
Figure 5.6 – Standby Mode on Overload Setting ......................................................................... 24
Figure 5.7 – Bi-Level Power Switch Location ..............................................................................25
Figure 6.1 – Input to Output Comparison, Controlled-Voltage Operation ....................................26
Figure 6.2 – Input to Output Comparison, Controlled-Current Operation ....................................26
Figure 6.3 – Factory-installed Default RC Network......................................................................27
Figure 6.4 – Custom Compensation Location..............................................................................29
Figure 6.5 – Compensation Eects on Waveform .......................................................................29
Figure 6.6 – Square Wave Showing a Decrease in R is Required ..............................................29
Figure 6.7 – Square Wave Showing an Increase in R is Required ..............................................29
Figure 6.8 – Square Wave Showing an Increase in C is Required ..............................................29
Figure 6.9 – Remote Status and Control Pinouts ........................................................................30
Figure 6.10 – Remote Status and Reset Schematic .................................................................... 31
Figure 6.11 – Remote Run/Standby Monitor ................................................................................ 32
Figure 6.12 – Remote Enable/Standby ........................................................................................ 33
Figure 6.13 – Remote Current Monitoring ...................................................................................33
Figure 6.14 – Remote Current Monitoring, Alternate Method ......................................................34
Figure 6.15 – Blanking Activation.................................................................................................34
Figure 8.1 – +Vcc and –Vcc Point Locations ...............................................................................39
Figure 8.2 – Amplier cover removed for inspection .................................................................... 39
Figure 8.3 – Fuse F1 Location .....................................................................................................40
Figure 8.4 – Interlock I/O Connector ............................................................................................ 40
Figure 8.5 – +TEMP and -TEMP test point locations ................................................................... 41
Information subject to change
97-2120001_8-24-2020
2110/2120/7794MR OPERATOR’S MANUAL – SECTION 1
8
1 Introduction
The AE Techron 2110/2120/7794MRL are high-
powered AC/DC linear ampliers and integrated 
power supplies that oer exceptional control of 
drift and distortion. The 2110/2120/7794MRL
function as a voltage or current source, making 
them a great choice for use in the lab or class-
room. Their linear design provides a very-low 
noise oor and fast current rise times. Because 
the 2110/2120/7794MRL have no ripple noise, no
synching with the console is required.
The 2110/2120/7794MRL also possess a number
of important physical attributes. They combine
small footprints, integrated power supply/amplier 
design, rugged construction and modest weight, 
to make them a great choice for eld-deployable, 
low-eld or small-bore MRI systems.
The AE Techron brand is known throughout the 
world for its robust, low-noise gradient ampliers 
as well as its product service and support.
1.1 Features
Output of up 200 amperes peak, 180 volts
(2120), 110 amperes peak, 195 volts (2110) or 
200 amperes peak, 100 volts (7794MRL).
4-quadrant linear design.
Blanking feature lowers the noise floor on the 
amplifier by shutting down the output stage. 
This action occurs in less than 10 µs.
Current mode response: –3 dB at 5 kHz (com-
pensation dependent); Voltage mode response: 
DC-20 kHz at rated power.
Robust, linear power supply results in extreme-
ly low noise; bi-level switch design limits heat 
dissipation to output devices.
Provides precision control of output offset, DC
drift and gain linearity.
Protection circuitry guards against input over-
loads, improper output connection (including 
shorted and improper loads), over-temperature, 
over-current, and supply voltages that are too 
high or low.
Shipped ready to operate from 208-volt (±10%) 
3-phase AC mains; 400-volt model available on 
request.
Figure 1.1 – 2110 Front Panel
97-2120001_8-24-2020
Information subject to change
9
2110/21207794MR OPERATOR’S MANUAL – SECTION 2
2 Amplier Unpacking and
Installation
The 2110/2120/7794MRL ampliers are precision 
instruments that can be dangerous if not handled 
properly. Lethal voltages are present in both the 
AC input supply and the output of these ampliers. 
For this reason, safety should be your primary con-
cern when you setup and operate this amplier.
2.1 Safety First
Throughout this manual special emphasis is 
placed on good safety practices.  The following 
graphics are used to highlight certain topics that 
require extra precaution.
Along with any additional accessories purchased 
by the customer, all 2110/2120/7794MRL ampli-
ers ship with the following:
1. Toolkit (contains one 1/8-inch Allen drive and 
three 2.7-ohm resistors)
2. NEMA connector for power cord
3. 2110/2120/7794MRL Operators Manual and
Quick Start
DANGER represents the most severe
hazard alert. Extreme bodily harm or
death will occur if these guidelines are
not followed. Note the explanation of the
hazard and instruction for avoiding it.
DANGER
WARNING alerts you to hazards that
could result in severe injury or death.
Note the explanation of the hazard and
the instructions for avoiding it.
WARNING
CAUTION indicates hazards that could
result in potential injury or equipment
or property damage. Once again, note
the explanation of the hazard and the
instructions for avoiding it.
CAUTION
2.2 Unpacking
All ampliers are tested and inspected for damage 
before leaving the factory. Carefully unpack and 
inspect the amplier for damage. Please note any 
damage for future reference and notify the ship-
ping company immediately if damage is found. 
Also, please save the shipping carton and materi-
als as evidence of damage and/or for returning the 
amplier for repair. 
Never attempt to lift the amplier with-
out assistance. Crushing bodily injury
can result if care is not taken during
installation. Cabinets may overturn if
not secured.
WARNING
2.3 Installation
The 2110/2120/7794MRL ampliers have rack 
“ears” on each side of the front panel for mounting 
to a standard EIA (Electronic Industries Associa-
tion) rack. Use standard rack mounting hardware 
to mount the amplier. 
NOTE: The 2110 weighs approximately 103 
pounds and the 2120 and 7794MRL weigh approx-
imately 153 pounds. Be sure this weight is properly 
supported using all the screw locations. 
When mounting the amplier in a rack cabinet, 
the sidewalls of the rack must be at least 2 inches
away from the chassis on both sides.
Allow for hot air discharge through the amplier’s 
rear grill. If your cabinet has a rear door, you must 
provide adequate airow through the door. Pro-
vide a source of cool air for fan intakes. If the rack
is crowded or rack ventilation is poor, use a vent
tube to the outside of the rack. Cooling capacity 
required is 300 ft3/min. total per amp. 
Do not operate the amplier in a small
sealed chamber of any kind. Improper
operations and overheating will result.
CAUTION
Information subject to change
97-2120001_8-24-2020
2110/2120/7794MR OPERATOR’S MANUAL – SECTION 3
10
When operating the 2110/2120/7794MRL in a 
dusty environment, use commercial furnace lters, 
or equivalent, to prevent rapid clogging of the 
lters on the amplier.
For Series operation in Controlled-Voltage
mode, refer to the Multi-Amp Conguration
Guide (available for download from aetechron.
com) for information on Series system congura-
tion.
For Series operation in Controlled-Current
mode, you should select one amplier to be oper-
ated as the “Master” amplier of the system, and 
then refer to the “Applications” section of this
manual for instructions on conguring this ampli-
er for operation in Controlled-Current mode. After 
the Master amplier is congured and tested for 
Controlled-Current operation, refer to the Multi-
Amp Conguration Guide (available for down-
load from aetechron.com) for information on Series 
system conguration.
For Parallel operation in Controlled-Voltage
mode, refer to the Multi-Amp Conguration
Guide (available for download from aetechron.com) 
for information on Parallel system conguration.
For Parallel operation in Controlled-Current
mode, please contact AE Techron Technical
Support for assistance.
3.2 Connecting the Load
3.2.1 Preparation and Cautions
Before connecting the amplier, make sure the
AC power is disconnected.
Connection to the output of the amplier is to a 
four-position terminal barrier block (accepts up to 
#4 AWG wire). Always use the appropriate wire 
size and insulation for the maximum current and 
voltage expected at the output. Never connect the 
output of the amplier to any other model amplier, 
power supply, signal source, or other inappropriate 
load; re can result.
NOTE: The 2110/2120/7794MRL amplier comes 
with a factory-installed 2.7-ohm, 2W, 5%, metal-
oxide resistor connecting the terminals marked 
“SAMPLED COMMON” and “CHASSIS GROUND” 
(see Figure 3.1). This resistor should NOT be
removed. WARNING: Removing this resistor can 
ELECTRIC SHOCK HAZARD.
Output potentials can be lethal. Make
connections only with AC Power OFF
and input signals removed.
WARNING
3 Connections and Startup
This section details the wiring and startup proce-
dures for a single 2110, 2120, or 7794MRL ampli-
er operating in Controlled-Voltage mode (factory 
default). Before connecting the amplier, make 
sure the AC power is disconnected.
3.1 Other Operation Modes and
Congurations
The 2110/2120/7794MRL amplier can be eld-
congured for operation in a number of dierent 
ways.  These would include Controlled-Voltage 
or Controlled-Current mode, and it also can be
congured for operation as a part of a multi-
amplier system. These alternate congurations 
may require special output wiring and/or additional 
components.
3.1.1 Controlled-Current Operation of a
Stand-Alone Amplier
If your application requires Controlled-Current 
operation, the 2110/2120/7794MRL amplier rst 
should be wired and tested in Controlled-Voltage 
mode to verify that the amplier and input signal 
are operating correctly. Once proper operation is 
conrmed, refer to the “Applications” section of
this manual for instructions on conguring and op-
erating your amplier in Controlled-Current mode.
3.1.2 Multi-Amp Operation
If your application requires multi-amp operation for 
increased voltage or current, each amplier should 
rst be wired and tested individually in Controlled-
Voltage mode to ensure proper operation. 
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2110/21207794MR OPERATOR’S MANUAL – SECTION 3
cause dangerous output and/or damage to the 
load unless the amplier is being used as a Fol-
lower amplier in a Series multi-amp system. See 
the AE Techron Multi-amp Conguration Guide
for more information on these advanced congura-
tions.
3.2.2 Connecting the Outputs
Locate the four-position terminal barrier block la-
beled OUTPUTS on the amplier back panel. See 
Figure 3.2.
Figure 3.3 – Closeup of SIM card
The Input Select switch, located on the SIM mod-
ule between the input connectors, allows conve-
nient selection of balanced or unbalanced input
wiring and also can function as a ground-lift switch 
for the BNC input connector. The Input Select
switch functions by connecting/ disconnecting the 
inverting (–) pin on each input connector to the 
amplier ground through a 4.7-ohm resistor (see 
Figure 3.4). When the Input Select switch is in the 
LEFT position, the shield on the BNC connector
and the inverting (–) pin on the terminal block con-
nector are tied to the amplier ground, allowing the 
connectors to be used for Unbalanced input wiring. 
When the Input Select switch is in the RIGHT 
Figure 3.2 – Controlled Voltage Hookup
Figure 3.1 – Closeup of the Output Terminal Resistor
Connect the negative terminal of the load to the 
SAMPLED COMMON terminal.
NOTE: Alternately, the COMMON terminal may be
used when operating in Controlled-Voltage mode; 
however, the integrated current monitor will not 
function if the COMMON terminal is used, since
it depends on feedback from the Sampled Com-
mon terminal. For operation in Controlled-Current,
mode, the SAMPLED COMMON terminal must be
used.
Connect the load’s positive terminal to the ampli-
er’s OUTPUT terminal.
3.3 Connecting the Input Signal
The signal is connected to the amplier through a 
“SIM” (Specialized Input Module) located on the 
amplier back panel (see Figure 3.3). The SIM 
card oers the choice of BNC or terminal block 
input connectors.
Information subject to change
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2110/2120/7794MR OPERATOR’S MANUAL – SECTION 3
12
Figure 3.4 – Input Select switch functions on 
the Input Terminals
position, the inverting (–) pin on the terminal block 
connector is oating, allowing the connector to be 
used for Balanced input wiring.
IMPORTANT: The Input Select switch can also
function as a Ground Lift switch for the BNC
Input connector. If circulating currents/ground
loops/60-Hz Hum occur when using the BNC
Input, move the Input Select switch to the right
to lift the ground on the connector.
We recommend that you use cables that are high 
quality and shielded to minimize noise and to 
guard against possible feedback.
Note: See the “Applications” section for informa-
tion on using the Interlock – I/O Connector located 
on the SIM card.
Figure 3.5 – 208V 3-Phase AC Mains Wiring Figure 3.6 – 380/400/415V 3-Phase AC Mains Wiring
The risk of lethal ELECTRICAL SHOCK
exists when connecting AC mains! Dis-
connect the source before connecting
AC power wires to the connector.
DANGER
3.4 Connecting the AC Supply
The 2110/2120/7794MRL amplier re-
quires 3-phase wiring. Always operate the 
2110/2120/7794MRL amplier from proper AC 
mains. The 3-phase, 47 - 60 Hz voltage must be 
208 VAC (or optionally 400 VAC) with no more 
than 10% variance above or below the line volt-
age. The amplier will not operate properly outside 
these limits.
The 2110/2120/7794MRL amplier includes a 
NEMA style locking AC connector as standard 
equipment. Connect the amplier to the proper 
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13
2110/21207794MR OPERATOR’S MANUAL – SECTION 3
3-phase AC mains with this connector. See Fig-
ures 3.5 and 3.6 for proper AC Mains wiring. The 
connector then plugs into the 2110/2120/7794MRL
amplier.  
3.5 Start-up Procedure
3.5.1 Voltage-Mode Operation
1. Turn down the level of your signal source.
2. Check to make sure the AC Mains Switch/
Circuit Breaker is in the o position 
(DOWN).
3. Apply AC power to the amplier.
4. Move the AC Mains Switch/Circuit Breaker
to the on position (UP) to turn the amplier 
ON. Wait for the yellow READY and green 
RUN LEDs to illuminate.
5. Adjust the level of your input signal source 
to achieve the desired output level.
3.5.1 Current-Mode Operation
Before conguring your amplier for Current mode 
operation, it is important to verify the amplier is 
operating correctly in Voltage mode. Perform the 
steps provided in the “Voltage-Mode Opera-
tion” Start-up Procedure to test the amplier in 
Controlled-Voltage mode. Use care if your load is 
very-low impedance since high currents can be 
caused by low input levels. Then refer to the “Ap-
plications” section of this manual for instructions
on Controlled-Current conguration and operation.
Information subject to change
97-2120001_8-24-2020
2110/2120/7794MR OPERATOR’S MANUAL – SECTION 4
14
4 Amplier Operation
4.1 Front-Panel Controls & Display
This section provides an overview of Front-
Panel controls and indicators found on the
2110/2120/7794MRL.
The Front Panel contains the following:
1. Push buttons
2. Main status indicators
3. Fault status indicator
4. Multi-function LCD display (7794MRL model 
only)
5. Navigation buttons (7794MRL model only)
4.1.1 Push Buttons
The 2110/2120/7794MRL provides three front-pan-
el soft-touch Push Buttons (see Figure 4.1):
Enable – For stand-alone ampliers, Enable will 
release the amplier from Standby mode and 
place the amplier in Run mode (both Ready and 
Run LEDs will be lit). When the amplier is placed 
in Run mode, the amplier will amplify the input 
signal. If an amplier is disabled using a Remote 
Standby application, the amplier will be placed in 
Ready mode (both Ready and Standby LEDs will 
be lit). To return the amplier to Run mode, release 
the Standby condition using the remote switch. 
See the “Applications” section of this manual for
more information on remote amplier operation.
By default, the amplier will automatically be 
Enabled and enter Run mode on power-up. To
change the factory-default setting and congure 
the amplier to power-up in Standby mode, please 
see the “Advanced Conguration” section.
In multi-amp systems that have been congured 
to start up in Run mode (factory default setting), 
when an amplier is powered on, the amplier will 
be placed in Ready mode (Ready and Standby 
LEDs lit) and remain in Ready mode until all ampli-
ers in the system have been powered on. The 
system will automatically proceed to Run mode
when all ampliers in the system are powered on 
and achieve Ready mode.
In multi-amp systems that have been congured 
to start up in Standby mode, when an amplier is 
powered on, the amplier will be placed in Standby 
mode (Stop and Standby LEDs lit). When the 
Enable button is pressed on each amplier, that 
amplier will be placed in Ready mode (Ready and 
Standby LEDs lit) and remain in Ready mode until 
all ampliers in the system have been Enabled. 
The system will automatically proceed to Run
mode when all ampliers in the system achieve 
Ready mode.
Stop – For stand-alone ampliers, Stop will place 
the amplier in Standby mode (both Standby and 
Stop LEDs will be lit). When the amplier is part of 
a multi-amp system, pressing the Stop button on 
any amplier in the system will place all ampliers 
in Standby mode. When an amplier is in Standby 
mode, the low-voltage transformer is energized but 
the high-voltage transformers are not. 
Reset – For stand-alone ampliers, when the am-
plier has stopped due to a fault condition, press-
ing the Reset button will return the amplier to Run 
Figure 4.1 – Push Buttons (2110 and 7794MRL models shown)
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15
2110/21207794MR OPERATOR’S MANUAL – SECTION 4
mode if the condition causing the fault condition 
has been cleared. When the amplier is part of a 
multi-amp system, pressing the Reset button on 
the amplier reporting the fault condition will return 
all of the ampliers to Run mode if the condition 
causing the fault condition has been cleared; how-
ever, pressing the Reset button on other ampliers 
in the system will NOT clear the fault condition.
4.1.2 Main Status Indicators
Four Main Status indicators are located on the am-
plier’s front-panel (see Figure 4.2). These LEDs 
monitor the internal conditions of the amplier and 
indicate the current state of operation. The chart in
Figure 4.3 details the operational modes indicated
by the Main Status indicators.
Figure 4.2 – Main Status Indicators (2110 and 7794MRL models shown)
Figure 4.3 – Main Status Indicators for Stand-Alone Ampliers
Indicator is lit Indicator is not lit Indicator may be lit
Main Status
Indicators State of Operation
Action Needed to Return to Run
Mode
Run
Ready
Standby
Stop
Run mode:The amplier’s high-voltage transformers 
are energized and the unit will amplify the input signal. 
Run mode is initiated by: (1) the Enable push button, or 
(2) when the amplier powers up in Run mode (factory 
default). See the “Advanced Conguration” section for
more information.
N/A
Run
Ready
Standby
Stop
Standby mode: Standby mode indicates that the am-
plier is functioning properly and all Fault Status modes 
are clear, but it is being held in Standby by an external 
condition. As congured from the factory (Run mode on 
startup), the amplier will enter Standby mode briey 
after powering up, and then will move automatically into 
Run mode. In Standby mode, the amplier’s low-voltage 
transformer is energized but the high-voltage transformers 
are not.
If the amplier remains in Standby mode, 
it is being held in Standby by remote con-
trol through the SIM Interlock I/O connec-
tor. Open the Enable/Standby switch to
clear this remote Standby condition and
return the amplier to Run mode. See the 
“Applications” section of this manual
for more information on remote amplier 
operation.
Run
Ready
Standby
Stop
Stop mode:  When the Stop button on the amplier front 
panel is pressed, the amplier will enter Stop mode. The 
amplier may also enter Stop mode after powering up if 
the amplier is congured to enter Stop mode on startup. 
In Stop mode, the amplier’s low-voltage transformer is 
energized but the high-voltage transformers are not.
To release the amplier from Stop mode, 
press the Enable button.
4.1.3 Fault Status Indicator
The Fault Status indicator is located on the ampli-
er front panel (see Figure 4.4). This LED moni-
tors the internal conditions of the amplier and will 
illuminate when a fault condition occurs. Depend-
ing on the fault condition and the conguration of 
the unit, the amplier may be placed in Standby 
mode when a fault condition occurs.
4.1.4 Multi-Function LCD Display
(7794MRL model only)
The multi-function LCD display provides peak and
RMS values for voltage and current measured 
directly from the amplier output. On startup, 
the LCD Display will provide readings for all four 
measurements: Volts peak, Volts RMS, Current
Information subject to change
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2110/2120/7794MR OPERATOR’S MANUAL – SECTION 4
16
Figure 4.4 – Fault Status Indicators (2110 and 7794MRL models shown)
Figure 4.5 – 7794MRL LCD Display and Navigation 
Buttons
peak, and Current RMS (see Figure 4.5). Use the 
Navigation buttons to scoll to other available dis-
plays, such as peak voltage and current only, RMS 
voltage and current only, or other combinations.  
If the amplier  experiences a fault condition, the 
LCD display will automatically display details of
the fault condition and prescribed corrective ac-
tions. Refer to the chart in Figure 4.6 to determine
the fault condition being indicated and the action 
required to clear the fault condition.
4.1.5 Navigation Buttons
The Navigation buttons provide four arrow keys to 
allow navigation through the dierent voltage and 
current measurement functions on the LCD display
screen. See Figure 4.5.
NOTE: The Enter button has been provided for
future expansion and has no function at this time.
4.1.6 Main Status Indicators for
Multi-amplier Systems
The Main Status indicators on each amplier in 
a multi-amp system are used to determine the
operational status of the amplier. When evaluated 
along with the statuses of other ampliers in the 
system, the Main Status indicators can be used
to determine the system status and the action
required to return the system to Run mode. See 
Figure 4.7.
4.1.7 Fault Status Error Messages for
Multi-Amp Systems (7794MRL
only)
Four dierent fault error messages may be dis-
played on the amplier’s front panel LCD screen 
when a fault condition occurs. All ampliers in the 
system may be placed in Standby mode when
a fault condition occurs, depending on the fault 
condition and the conguration of the system. Typi-
cally, the system can be released from Standby
mode by pressing the Reset button on the ampli-
er displaying the Fault status. Refer to the chart 
in Figure 4.8 to determine the fault condition being 
indicated and the action required to clear the fault 
condition and return the system to Run mode.
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17
2110/21207794MR OPERATOR’S MANUAL – SECTION 4
Figure 4.6 – Fault Status Messages for Stand-Alone Ampliers (7794MRL only)
Indicator is lit Indicator is not lit Indicator may be lit
Main Status
Indicators
Fault Status
Reported on
LCD Display State of Operation
Action Needed to Clear Fault
Condition and Return to
Run Mode
Run
Ready
Standby
Stop
WARNING! 
OUTPUT
DEVICE FAULT
Output Device Fault: This indicates
that an Output Fault condition has oc-
curred and the amplier has been placed 
in Standby mode. The Fault indicator
will light under two conditions: 1) High-
frequency oscillation is causing high 
shoot-through current; or 2) An output 
transistor has shorted, causing the output 
fault condition.
This fault condition cannot be cleared
using the front-panel Reset button. See 
the ”Troubleshooting” section for more
information on diagnosing and clearing this 
fault condition.
Run
Ready
Standby
Stop
WARNING! 
OVERLOAD
Overload: This indicates that the output
of the amplier could not follow the input 
signal due to voltage or current limits. Un-
der normal operation with the factory-de-
fault settings, an Over Load condition will 
not place the amplier in Standby mode. 
If the amplier has been congured to 
be forced to Standby on Over Load, the
amplier will be placed in Standby mode 
when the Over Load indicator lights. 
To remedy the Overload fault during 
operation, turn down the level of the input
signal until the Fault indicator turns o. To 
clear an Overload fault condition when the
amplier is forced to Standby, turn down 
the level of the input signal, then push the 
Reset button.
Run
Ready
Standby
Stop
WARNING! 
OVERTEMP
Overtemp:  The amplier monitors 
the temperature inside the high-voltage 
transformers, low-voltage transformer 
and in the output stage heat sinks. The 
Fault indicator will light and the amplier 
will be placed in Standby mode when the
temperature sensors detect a condition
that would damage the amplier. If the 
Overtemp pulse is extremely short, as in 
the case of defective wiring or switches, 
the Fault LED may be lit too briey to 
observe.
To reset after an Over Temp fault has oc-
curred, make sure the amplier fans in all 
ampliers are running, and then remove 
the input signal from the system. Allow 
the fans to run for about 5 minutes until
the system automatically returns to Run
mode. If the system has been congured 
for Standby mode on Over Temp, then the
system will not automatically return to Run
mode. In that case, push and hold the Re-
set button on any amplier displaying the 
Over Temp status until the Standby LED
turns o, then release the Reset button to 
return the system to Run mode. Please
see the “Troubleshooting” section for
information on correcting the cause of an 
Over Temp fault condition.
Run
Ready
Standby
Stop
WARNING! 
OVERVOLTAGE
Overvoltage: This indicates that the
AC mains voltage is more than +10% of 
nominal. The amplier will be forced to 
Standby when an Overvoltage condition 
occurs. When the Overvoltage condition 
is cleared, the amplier will automatically 
return to Run mode.
To clear an Overvoltage fault condition, 
the AC mains must be brought down to 
the nominal value. If the amplier does not 
return to Run mode when the Overvolt-
age condition has cleared, the amplier 
may require servicing. Please see the 
”Troubleshooting” section for more
information.
Information subject to change
97-2120001_8-24-2020
2110/2120/7794MR OPERATOR’S MANUAL – SECTION 4
18
Figure 4.7 – Main Status Indicators for Multi-Amplier Systems
Indicator is lit Indicator is not lit Indicator may be lit
Main Status
of One or
More Amps in
the System
Main Status of
Other Amps in
the System State of Operation
Action Needed to Return to
Run Mode
Run
Ready
Standby
Stop
Run
Ready
Standby
Stop
Run mode: All of the ampliers in the 
system are in Run mode. The ampliers’
high-voltage transformers are energized 
and the system will amplify the input
signal.
N/A
Run
Ready
Standby
Stop
Run
Ready
Standby
Stop
Remote Standby Condition: All of
the ampliers in the system are being 
held in Standby mode by an external 
condition. In Standby mode, the ampli-
ers’ low-voltage transformers are ener-
gized but the high-voltage transformers 
are not.
If the ampliers remain in Standby 
mode, the system is being held in 
Standby by remote control through the 
SIM Interlock I/O connector. Open the
Enable/Standby switch to clear this
remote Standby condition and return
the system to Run mode. See the
”Applications” section of this manual
for more information on remote ampli-
er operation.
Run
Ready
Standby
Stop
Run
Ready
Standby
Stop
System Not Ready: If one or more
of the ampliers has no LEDs lit, the 
amplier has no power or has not been 
turned on, and the other ampliers in the 
system will be held in Standby mode.
In Standby mode, the amplier’s low-
voltage transformer is energized but the 
high-voltage transformers are not.
Make sure all ampliers have AC 
power and have been turned on. When
all ampliers attain Standby status, all 
ampliers in the system will simultane-
ously be placed in Run mode.
Run
Ready
Standby
Stop
Run
Ready
Standby
Stop
Stop mode: When the Stop button on
any amplier in the system is pressed, 
that amplier will enter Stop mode and 
all other ampliers will enter Standby 
mode. The system may also enter Stop
mode after powering up if one or more 
ampliers in the system is congured 
to enter Stop mode on startup. In Stop
mode, the amplier’s low-voltage trans-
former is energized but the high-voltage 
transformers are not.
To release the system from Stop mode,
press the Enable button on the ampli-
er displaying the Stop mode status.
97-2120001_8-24-2020
Information subject to change
19
2110/21207794MR OPERATOR’S MANUAL – SECTION 4
Figure 4.8 – Fault Status Indicators for Multi-Amplier Systems
Indicator is lit Indicator is not lit Indicator may be lit
One or More Amps in System
Main Status
Indicators of
Other Amps
in System State of Operation
Action Needed to Clear
Fault Condition and Re-
turn to Run Mode
Main Status
Indicators
Fault Status
Reported on
LCD Display
Run
Ready
Standby
Stop
WARNING! 
OUTPUT
DEVICE FAULT
Run
Ready
Standby
Stop
Output Device Fault sta-
tus: This indicates that an Out-
put Fault condition has occurred
in the amplier displaying the 
Fault status, and the system has
been placed in Standby mode.
The Fault indicator will light 
under two conditions: 1) High-
frequency oscillation is causing 
high shoot-through current; or 2) 
An output transistor has shorted,
causing the output fault condi-
tion.
This fault condition cannot be
cleared using the front-panel 
Reset button. See the ”Trou-
bleshooting” section for more
information on diagnosing and 
clearing this fault condition.
Run
Ready
Standby
Stop
WARNING! 
OVERLOAD
Run
Ready
Standby
Stop
Overload status: This
indicates that the output of the
system could not follow the input
signal due to voltage or current 
limits. Under normal operation
with the factory-default settings, 
an Overload condition will not
place the system in Standby
mode. If the system has been
congured to be forced to Stand-
by on Overload, the system
will be placed in Standby mode
when the Fault indicator lights. 
To remedy the Overload fault
during operation, turn down the 
level of the input signal until 
the Overload indicator turns
o. To clear an Overload fault 
condition when the amplier is 
forced to Standby, turn down
the level of the input signal, 
then push the Reset button on
the amplier(s) displaying the 
Overload status.
Run
Ready
Standby
Stop
WARNING! 
OVERTEMP
Run
Ready
Standby
Stop
Overtemp status: Each am-
plier in the system monitors the 
temperature inside the high-volt-
age transformers, low-voltage 
transformer and in the output
stage heat sinks. The Overtemp 
indicator will light and the system 
will be placed in Standby mode
when the temperature sensors
detect a condition that would
damage the amplier system. If 
the Overtemp pulse is extremely 
short, as in the case of defective
wiring or switches, the Fault LED 
may be lit too briey to observe. 
To reset after an Overtemp
fault has occurred, make sure
the amplier fans in all ampli-
ers are running, and then 
remove the input signal from 
the system. Allow the fans to
run for about 5 minutes until the
system automatically returns to
Run mode. If the system has
been congured for Standby 
mode on Overtemp, then the
system will not automatically re-
turn to Run mode. In that case,
push the Reset button on any
amplier displaying the Over-
temp status to return the system
to Run mode. Please see the
”Troubleshooting” section
for information on correcting 
the cause of an Overtemp fault
condition.
Information subject to change
97-2120001_8-24-2020
2110/2120/7794MR OPERATOR’S MANUAL – SECTION 4
20
One or More Amps in System
Main Status
Indicators of
Other Amps
in System State of Operation
Action Needed to Clear
Fault Condition and Re-
turn to Run Mode
Main Status
Indicators
Fault Status
Reported on
LCD Display
Run
Ready
Standby
Stop
WARNING! 
OVERVOLTAGE
Run
Ready
Standby
Stop
Overvoltage status: This
indicates that the AC mains
voltage is more than +10% of 
nominal. All ampliers in the 
system will be forced to Standby
when an Overvoltage condition 
occurs. When the Overvoltage 
condition is cleared, the system
will automatically return to Run
mode.
To clear an Overvoltage fault 
condition, the AC mains must
be brought down to the nomi-
nal value. If the system does
not return to Run mode when
the Overvoltage condition has 
cleared, one or more ampliers 
may require servicing. Please 
see the “Troubleshooting”
section for more information.
4.2 Back-Panel Controls
and Connectors
This section provides an overview of Back-
Panel controls and connectors found on the
2110/2120/7794MRL amplier. Please refer to 
Figure 4.9 for visual locations.
AC Power Connector - This is a NEMA style twist
lock, 4 pin (208V) or 5-pin (400V), three-phase 
connector. See page Error! Bookmark not dened. 
for terminal connections.
Low-Voltage Fuse - This is a 1A slow blow type
600-volt rated fuse.
Figure 4.9 – Back Panel Controls and Connectors
AC Mains Switch/Circuit Breaker - This dual
function power switch and circuit breaker opens all
legs of the AC mains. The rating is 20A (2110) or 
30A (2120) for 208 volts.
Output Terminal Block - Connect output lines
from the load to this 4-terminal block. It accepts up
to #4 AWG wire. Drive the load in the Controlled 
Current mode using the OUTPUT terminal and the 
SAMPLED COMMON terminal only.
BNC Input Connector - This input option provides
a standard unbalanced input.
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AE Techron 2120 User manual

Category
Audio amplifiers
Type
User manual
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