Signet Pulse 2.200 LS Operation & Instruction Manual

Brand: Signet

Model: Pulse 2.200 LS

Category: Video switches

Type: Operation & Instruction Manual

Signet Pulse 2.200 LS is a dual 200W 100V line amplifier with monitoring capabilities, suitable for professional audio applications. It features independent amplifier modules with Main and Aux inputs, allowing for mixing and monitoring. Comprehensive fault monitoring ensures system reliability, detecting issues like load impedance deviations, tone fail, and earth faults. The amplifier provides status indicators on the front panel for each module and the power supply, making it easy to identify and troubleshoot any problems.

Page 1 of 12 DocNo.DCP0001326 DSM 06/01/05 rev7

Features

The P2.200 LS amplifier contains two identical independent amplifier modules. Each has one Main and one

Aux. input. Routing logic allows the Main and Aux. to mix; this allows the monitoring tone to pass at all times

and the monitoring system to operate. If the PTT is operated, the Main input overrides the Aux.

Each module’s status is displayed on the front panel along with an output level bar graph and status

indicators. All sections of the amplifier and charger are constantly monitored for faults or abnormal operation:

1 The load monitoring checks the power absorbed by the loudspeaker load at 22 kHz and compares this

with the threshold and window levels set at installation. If the power drawn deviates outside the window a

fault is indicated on the front and rear of the unit and signalled to other equipment via the relevant fault

outputs.

2 If the impedance monitoring tone is not being received by the amplifier, both the Load Hi and Load Low

front LEDs light and the rear Tone Fail light shows.

3 Should either leg of the loudspeaker wiring short to system earth this will also light the Load Hi and Load

Low LEDs on the front panel, along with the Earth Fault LED on the rear.

4 Mains power status is also monitored, along with the internal fuses, to give a complete picture of the state

of the amplifier.

The load monitoring system also provides an output to drive a ‘hot swap’ automatic amplifier replacement

system, via the HSP port, on failure of the amplifier only. Should a load fail short or open circuit but the

amplifier is still OK, the hot swap output will not operate. This means that any loudspeakers that can be

driven will operate and leaves the hot swap amplifier available for use on another potential failure.

The output from each module is presented on a three-way socket and is fully floating. The standard output

voltages are 50V and 100V, allowing two modules to be connected in series to give 400W at 100V line.

The power supply has a 24 Vd.c. battery input and an onboard battery charger.

Technical Description

Amplifier Modules

The Aux. and Main line level inputs are de-balanced and pass via level controllers and an analogue switch

into a summing amplifier where they are mixed. If the contact input is asserted (470 ohms to ground) a logic

circuit disconnects the aux. input.

The protect circuit disconnects the output transformer when the voltage rails fall below 22 Volts, exceed 36

Volts, or when a d.c. offset is present on the output rails. The signal then passes through to the output stage,

which is a feed-forward current-mode bridge circuit and the output level meter monitors the level at this stage.

The output current is passed through the primary of the output transformer and through a low value output-

sensing resistor. The output of the transformer is tapped at 50 and 100 Volts. If the 50 Volt taps are

connected in series the unit provides a single 400 Watt output at 100 V line.

Power Supply

A large capacitor reservoir provides a very smooth output, even under large current surges. Two separate

internal 10 Amp fused outputs connect to the two amplifier modules.

A separate low-current feed passes via the sleep enable selector link into the sleep timer section. Another

feed passes, via the Aux. on LED (this shows that the Aux. power is available on the rear connector) through

a 3 Amp fuse to the Aux. power connector. With mains voltage operation this unregulated output is at

approximately 32 Vd.c. When mains has failed, this output is connected to the battery and therefore operates

at battery voltage level.

A 27.6 Volt regulator is also taken off this line and used to charge external batteries via a 20 Amp fuse.

PSU and amplifier faults are returned into the monitoring circuit from both amplifiers, slugged to prevent false

faults being reported externally, and passed to the open collector fault outputs on the SIP port. A fourth open

collector output is normally set as OK (normally closed) and opens when any fault occurs.

Operation Instruction Manual

Pulse 2.200 LS Dual 200W 100V line Amplifier with Monitoring

Page 2 of 12 DocNo.DCP0001326 DSM 06/01/05 rev7

Block Diagrams Front panel indicators

DISPLAY

PSU/

CHARGER

P2.200LS OVERALL

BLOCK DIAGRAM

ISSUE 1.

AMP

MODULE A

AMP

MODULE B

AMP

MODULE A

AMP

MODULE B

230VAC

50/60Hz

AUX 27.6V

OUT

24V SEALED

LEAD-ACID BATTERY

FAULTS

SHOWS THE OVERALL CONFIGURATION OF PSU AND AMP MODULES PLUS DISPLAY

SIP

PORT

HOT SWAP PORT B

HOT SWAP PORT A

P2.200LS PSU MODULE BLOCK DIAGRAM

ISSUE 1.

5AMP

HBC

35A

BATTERY

20A

27.6 V

REGULATOR

AC IN

44000µF 3A

AMP

MODULE A

AMP

MODULE B

AMP

MODULE A

AMP

MODULE B

16 SECONDS ON

15 MINUTES OFF

SLEEP

ENABLE

AUX

230VAC

50/60Hz

AUX 27.6V

OUT

MONITOR

GROUND

OKPSU

FAULT

DISABLE

DC IN

20A

10A

ALL FUSES AUTOMOTIVE BLADE

TYPE, EXCEPT MAINS INLET

FUSE

AMP A FAULT

AMP B FAULT

OK, SIP4PSU FAULT, SIP3

AMP B FAULT, SIP2

AMP A FAULT, SIP1

SLEEP

LINE

(AUX)

0dB

LEVEL

P2.200LS AMPLIFIER MODULE BLOCK DIAGRAM.

TWO PER P2.200LS ISSUE 1

LINE

(MAIN)

0dB

LEVEL

MONITOR

ANALOGUE

SWITCH

ANALOGUE

SWITCH

CONTROL

50 V

100V

CONTACT

(PTT IN)

OPEN

CIRCUIT

FAULT

SHORT

CIRCUIT

FAULT

DETECT

FAULT

HSP2

LOAD

HIGH

FAULT

HSP1

LOAD

LOW

FAULT

HSP4

DETECT

FAULT

HSP3

WINDOW

THRESHOLD

TONE

FAIL

DETECTS CURRENT

THROUGH RESISTOR

EARTH

FAIL

PROTECT

SLEEP IN

-18 -6 -3 0

OUTPUT LEVEL

LOGIC

15V

REG

Vp out

+24 Vin

GROUND

+24V IN

OUTPUT

4TH ORDER BANDPASS

FILTER @ 22.05KHz

RLA1

RLA

OK HSP6

HSP5

IF LOAD LOW & TONE FAIL OR PROTECT THEN OK

HSP = HOT SWAP PORT.

CAN AVOID HOT SWAP IF NATURE OF

FAULT MEANS THERE IS NO POINT

AMP FAULT TO PSU

(OPEN CIRCUIT OR

SHORT CIRCUIT OR

LOAD HIGH OR LOAD

LOW OR TONE FAIL OR

EARTH FAULT)

Page 3 of 12 DocNo.DCP0001326 DSM 06/01/05 rev7

Each amplifier’s current status is displayed on the front panel, along with output bar graphs for each channel,

and the access status. All indicators are in accordance with BS 5839: Part 4: 1988.

Each amplifier module has a separate indication on the front panel for the following states:

Name Function / Description

Output level A four-element moving dot display shows the current amplifier output

level in logarithmic steps with 0dB being full power.

Priority The control contact on the main input is closed.

Protect The onboard protection systems have been activated and the load is

now isolated.

Sleep This facility is not used as it does not comply with BS5839-8

Load Hi The load monitoring system has detected an open circuit or higher

impedance than was set at commissioning.

Load Low The load monitoring system has detected a closed circuit or lower

impedance than was set at commissioning.

Contact Fault The main input control contact or wiring is either open circuit or short

circuit.

Tone fail

(Load Hi and Load Low lit)

The amplifier cannot detect the 22 kHz monitoring tone.

The power supply unit also has front panel status indication for the following states:

Name Function / Description

AC in The AC mains supply is healthy.

DC in The reserve battery supply is in use.

PSU Fault The battery charger has detected either a short circuit or high

impedance battery.

Aux. on The auxiliary power supply for external equipment is available.

OK All the functions of the amplifier are normal.

Page 4 of 12 DocNo.DCP0001326 DSM 06/01/05 rev7

Name Function/Description

Switch Switches mains power

AC Input 6A IEC 3 pin connector

(Fuse: 5A 250V 20mm HBC)

Battery

Input

Rear of CliffCon 4

PC/P

Pin 1- : GND

Pin 1+ : +24V DC

@ 20A

Hot Swap

Port

Aux.

Power

Output See Output Connections

SIP Port See Internal Adjustments (page 9)

Level

control

Audio level control of

closest input.

Aux.

audio

input

LEDs

OC, The main input control wiring

is open circuit.

SC The main input control wiring is

short circuit.

E, Earth fault The 100V

loudspeaker line has a short to

ground.

Hi, Load High. Open circuit

detected, or a impedance higher

than commissioned.

TF, Tone Fail The monitor tone on

the input signal is not detected.

Lo, Load Low. Closed circuit

detected or lower impedance than

commissioned.

Window

Threshold

Main

audio

input

Switch: 470R to GND = on

6k8 to GND = off

See mix mute settings on page 9

Level

Used to set-up the fault

monitoring circuitry (see

page 6)

Rear panel controls & features

Page 5 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

Installation

Unpacking

On receipt of the amplifier shipment, please inspect for any damage incurred in transit. If damage is found,

please notify your supplier and the transport company immediately. State date, nature of damage and

whether any damage was present on the shipping container prior to unpacking. Please give the waybill

number of the shipping order.

This equipment is only suitable for installation in a well ventilated 19 inch equipment rack. Bottom and top

ventilation holes must not be blocked and air must be allowed to circulate freely through the internal

heatsinks.

If several P2.200LSs are installed in one rack, at least one U of rack space must be left between each

amplifier.

The unit should not be placed in areas;

1 with poor ventilation

2 exposed to direct sunlight

3 with high ambient temperature or adjacent to heat generating equipment

4 with high humidity or dust levels

5 susceptible to vibration

Caution To prevent electric shock do not remove the cover

AC power operation

Due to the size and inductance of the power transformer, depending on where in the cycle the power is

switched on, the inrush current that is drawn when this device is connected can be as much as 150 Amps!

It is therefore essential that mains power is only derived from an automatic soft start device such as SigNET’s

SOFT4.

Connect the a.c. power cord to any one of the four IEC amplifier power outlets as described in the SOFT4

manual.

The unit complies with BS415.

AC power cord

The wires in the mains lead supplied with the unit are coloured in accordance with the following code.

Green and Yellow

Earth

Blue Neutral

Brown Live

As the colours of the wires in the mains lead of this unit may not correspond with the coloured markings

identifying the terminals in your plug, please connect as follows.

Wire

Plug terminal

Green and Yellow ‘E’ mark

‘EARTH’ symbol mark

‘GREEN’ mark

‘GREEN AND YELLOW’ mark

Blue ‘N’ mark

‘BLACK’ mark

‘BLUE’ mark

Brown ‘L’ mark

‘RED’ mark

‘BROWN’ mark

Caution To prevent electric shock do not remove the cover

Page 6 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

The P2.200LS is designed to operate with two 12 Volt VRLA batteries connected in series.

BS5839-8 1988 requires that batteries must be capable of operating the system according to the project

requirements (normally 24 Hours in a quiescent current state plus 30 minutes in full alarm). It also requires

that batteries be sized so as to provide 25% overcapacity to allow for loss of capacity over time.

It is also necessary to allow for the current drawn by any ancillary equipment connected to the Auxiliary power

output. Auxiliary devices should be connected to different P2.200LS amplifiers in order to spread the load as

evenly as is practical.

Quiescent Battery capacity

The current drawn in the quiescent state is 75 mA per amplifier module, 150 mA total.

The current drawn in the quiescent state with all fault indicators lit is 150 mA per module, 300 mA total.

Therefore, for worst case, the power drawn over 24 Hours is 7.2 AHr.

Alarm Condition Battery Capacity

It is difficult to predict the exact current drawn in alarm condition so the following approximation is used.

Emergency messages consist of a tone, silence, message and silence.

The average power content of speech is approximately 5%.

The average power content of a tone is approximately 20%

The average power content of silence is nil.

A conservative estimate of current draw is therefore 10% of the peak.

The peak current drawn from each amplifier channel is 11 Amps, 22 Amps total.

10% of the peak value is therefore 2.2 Amps or, for 30 minutes, 1.1 AHr.

However, batteries must be de-rated by 50% at high discharge rates and so a figure of 2.2 AHr is taken

If 60 minutes in alarm is required, 4.4 AHr will be required.

Total Battery Capacity

Add alarm state battery capacity to the quiescent capacity and the capacity required is 9.4 AHr

Add 1/3 to allow for a 25% loss of capacity over time and the smallest battery that can be used is 12.5 AHr.

The smallest standard battery above this size is 18 AHr and 27 AHr gives even more spare capacity.

Additional battery capacity for ancillary equipment

Add the capacity required for any ancillary equipment, plus one third for battery aging. These figures do not

change in an alarm condition.

Worst case quiescent current drawn at 24V d.c.

SS2N = 75 mA = 1.84 AHr + 1/3 = 2.44 AHr

Psiren = 50 mA = 1.23 AHr + 1/3 = 1.63 AHr

FCB = 50 mA = 1.23 AHr + 1/3 = 1.63AHr

Integrity Mainframe = 300 mA = 7.35 AHr + 1/3 = 9.78 AHr

MP2 = 50 mA = 1.23 AHr + 1/3 = 1.60 AHr

MPP panel (any) = 150 mA (all LEDs lit) = 3.68 AHr + 1/3 = 4.89 AHr

Batteries must be connected via a suitable fuse. We recommend DIN mounted cartridge fuse holders ref

RS371-0340 and 20A RS230-3496 cartridge fuses.

Correct Power-up Sequence

Plug in mains connector

Make sure external battery fuse is out of circuit

Connect battery connector to amplifier

Switch on mains

Connect battery fuse

Power-related fault indicators should extinguish

If the batteries are connected before the mains supply is turned on the inrush current will weaken the internal

battery fuse.

DC power operation and Battery Calculation

Page 7 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

PTT monitoring

The contact input (PTT in) is monitored by a resistive potential divider as shown below;

6K8

470R

27V6DC

PTT Input

The terminal voltage here defines

the status of the PTT line:-

Open circuit fault

Trigger

Short circuit fault

PTT Switch

The current drawn by the 6K8Ω resistor (in the

previously connected unit) proves that the PTT

line is intact. Open and short circuit faults are

separately detected and operation of the PTT is

detected by the change in voltage level at the

PTT input when the 470Ω is switched in.

Amplifier and Loudspeaker Circuit Monitoring

To monitor the amplifier and loudspeaker system, the voltage across the output sensing resistor is measured

and taken through a fourth order bandpass filter @ 22.05 kHz to a comparator which detects the power being

drawn at the monitoring tone frequency. The tone is injected into the amplifiers’ input from the previous

device in the chain (matrix).

The output from the comparator passes into a detector circuit, which compares its value with the threshold

set at installation. It also detects the absence of the tone and reports this to the tone fail output. The output

from the detector passes to a comparator, which drives the load high output. A window control between that

comparator and a second device connected to the load low output is used to adjust how much the impedance

can vary before a fault is flagged.

Loudspeaker Circuits

An end of line detection unit is supplied for each circuit (two per dual amplifier module). These must be fitted

at the end of each loudspeaker line so that the line can be monitored in accordance with BS5839 part 8,

which requires that loudspeaker line continuity be monitored, not the loudspeakers themselves.

Loudspeaker Spurs

Note that this implies that spurs are not allowed. If a loudspeaker output is to be split to drive two circuits this

is only possible using the SPLIT100 Line Splitter, which protects either circuit against a short circuit in the

other circuit. The SPLIT100 is provided with one EOL device so that one EOL can be used at the end of each

circuit. If the circuit is split more than once, it is not possible to detect circuit faults reliably and so this is not

allowed.

A detector circuit connected to the 50 Volt output transformer tap monitors the current flowing and any

imbalance must be due to a short to system earth so an earth fault is detected.

The load high, load low, earth fault and tone fail outputs are brought out separately (un-slugged) on the HSP

port.

Fault ports

There are three fault output ports; the SIP port, and two Hot Swap ports.

The SIP port is slugged to prevent false faults being passed on to the system and provides four open

collector outputs; Amp A fail, Amp B fail, and PSU fail (normally open) plus OK (normally closed). These

normally connect to pins 1 to 4 of the SIP port via an internal dual in-line header with four shorting links fitted.

This header can be reversed to bring the faults out on pins 5 to 8 instead. This allows faults from two dual

amps to be fed down a piece of flat ribbon cable to an SS2N.

The Hot Swap ports are not slugged so need to be gated with the SIP port to prevent false faults. They are

provided to allow detailed amplifier fault information thus; Earth Fault, Tone In Fail, Load Low, Load High,

plus an open collector output that only conducts if the fault is not Load Low or Tone Fail to prevent

unnecessary amplifier swapping.

A common fault output is also provided which is triggered by any or all of the six fault conditions already

described.

Fault Monitoring

Page 8 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

Input connections

Connecting the P2.200 to a SigNET iX LS

(prioritised mixer) including battery backup.

Important Note: When replacing P2.200

amplifiers on site it must be ensured that the

iX LS model uses a 22Khz monitoring tone.

This will be shown by a sticker on the unit.

iX LS units without a sticker must be

replaced with 22Khz units. (Older iX LS units

use a 20 Khz monitoring tone).

End of line units (supplied with the amplifier)

must also be fitted.

Connecting the P2.200 to a SigNET SS2n (Network station), including battery backup.

1. SS2n feeding both amplifier modules

2. SS2n feeding only one amplifier module

Connecting the P2.200 to an Integrity Mainframe.

Page 9 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

The amplifier may be used in conjunction with 100

Volt constant voltage loudspeaker systems. This

technique is ideal in public address applications

where it is necessary to operate loudspeakers

over a distance from the amplifier as it prevents

excessive line losses. Line matching transformers

must be installed at each loudspeaker to match them to the amplifier. Low ohm speakers will sound distorted.

This is similar in principle to mains electricity distribution where power is transformed to high voltages and

sent long distances over small conductors before being transformed down again at its destination(s).

These constant voltage outputs are most convenient for distribution of power when a number of speakers are

installed. Each loudspeaker must have a 100 Volt line transformer with a tap that gives the power desired for

that loudspeaker. The total number of power settings for all speakers should be equal to the amplifier power

rating or less. See the following diagrams.

100 Volt connection (200 Watt) 100 Volt connection (400 Watt)

Operation and Set-up

Once an amplifier is installed and powered up, it is necessary to adjust or verify the following

settings:

1. Ensure that an audio lead from a SigNET routing matrix is connected to both Main Inputs a.

2. Check that the monitoring tone is not disabled (the tone fail (TF) indicator is not lit).

3. No audio should be routed into the Main input except for the 22 kHz monitoring tone

4. Using an oscilloscope (e.g. Maplin Part No.IN02158) or true r.m.s voltmeter (RS218-0265) capable of

reading up to 25 kHz, connect to each 100V line output across 0V + 100V. Adjust the main level control

to give a reading of 6 Volts Peak to peak (2.12 Volts r.m.s)

NB Default factory setting is 0V (off), other than on full System deliveries.

5. Once set, this level control must not be adjusted again – all level adjustments must be carried out

by altering the levels from the source equipment (matrix).

Set-up the load monitoring circuit is as follows;

6. Turn the Threshold and Windows controls to minimum (anticlockwise). Ensure load and End of line

(EOL) unit are connected. If loudspeaker splitters are used there must be an end of line unit on each

spur. If more than two end of line units are fitted, the monitoring system will not operate reliably.

7. Turn up the threshold control clockwise until the Load Hi and Load low LED’s are just toggling.

8. Open window control fully (clockwise).

9. Remove the EOL unit. Load Hi should come, and remain on.

10. Refit EOL, Load Hi LED should extinguish.

Note Loudspeaker runs of more than 400m are not recommended, as faults cannot be reliably

detected.

Output connections

Output socket

Page 10 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

These adjustments should only be carried out by qualified personnel. The power lead and battery

supply must be disconnected before the top cover is removed.

The following adjustments involve removal of the top cover of the unit, remove the side and top screws then

lift lid off.

Mix / Mute (one per amp module)

Mix (Default) Used in life safety applications to allow the high frequency monitoring tone to pass. When

the Main input is not in use, the Main and Aux. inputs are mixed together (this gives the

monitor tone a path through the amp preventing monitor tone faults).

Mute Switch open (pin1 of main input) Main input is muted. Aux. input is accessed

Switch closed (pin1 of main input) Main input is accessed. Aux. input is muted

PSU Monitor

Enabled (default) Battery monitoring enabled.

Disabled Battery monitoring disabled, this removes the battery fault from the front panel if batteries

are not fitted.

Sleep Mode

Disabled (default) This facility is not used as it does not comply with BS5839-8

All other jumpers on the unit are all for SigNET’s internal use / test purposes only.

SIP port

These four fault outputs pass via a 16-pin dual in line socket containing a rewireable header to the top eight

pins of the SIP connector.

By default these are connected via wire links to pins 1 to 4 this used by SigNET to designate a node A

amplifier. With the header-reversed pins 5 to 8 are connected. This configuration is used by SigNET to

designate a node B amplifier.

The header can be rewired to allow any combination of the eight pins for custom wiring.

Node A amplifier

(default) (diagram

shows male

connector on back of

amplifier)

Node B amplifier

(with header

reversed) (diagram

shows male

connector on back of

amplifier)

Internal Adjustments

Page 11 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

Specification

Amplifier Performance Specification

Sensitivity

Impedance

CMRR

Switch input

Output power

Frequency Response

THD

SINAD

Regulation

Output voltage

Operational mode

Protection

Standby current

Full load current

0dB for both Main and Aux. Inputs

10K balanced (Main and Aux.)

better than 60dB

470Ω to GND = on

6k8Ω to GND = off

200W Continuous average power

30Hz to 20kHz -3dB +0dB

better than 0.1% , 1kHz

better than -80dB

better than 2dB

100V line

Current mode, feed forward system

Over voltage, under voltage, d.c. offset, short circuit,

thermal and safe operating area

75mA (150mA with fault lights lit and full load monitoring)

11A

Physical

Material

Colour

Width

Height

Depth

Weight

18swg Zintec sheet steel

Black (RAL 9500 semi-gloss)

430mm

88mm

315mm (behind front panel)

17kg

Power supply & charger

AC input

DC input

Charging voltage

Charging current

Monitoring

Aux. Supply

SIP Port

230 VAC +/- 20%

22 to 34 V DC

27.6 V DC

Short circuit and battery high impedance

User assignable faults for the SigNET network

Monitoring

Detection frequency

Detection type

Window

Sensitivity

End of Line units, one

required per channel.

22.05kHz

Window comparator system

5% to 20% user adjustable

-40dB to -10dB, user adjustable

0.047μF in series with 100Ώ RS365-7227

Fuses

Mains Inlet

Internal Automotive Blade

Amp feeds

Battery

Charger

Aux.

5A 250V 20mm HBC

10A x 2

20A x 1

3A x 1

Page 12 of 12 DocNo.DCP0001326 DSM 05/01/05 rev7

PSU pcb showing internal fuse locations

Fuses are commonly available automotive

blade types

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE

SigNET (AC) Limited

6 Tower Road

Glover Estate,

Washington,

Tyne & Wear, NE37 2SH

Tel: +44 (0)191 417 4551

Fax: +44 (0)191 417 0634

info@signet-ac.com

www.signet-ac.com

Signet Pulse 2.200 LS Operation & Instruction Manual

Brand: Signet

Model: Pulse 2.200 LS

Category: Video switches

Type: Operation & Instruction Manual

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Signet Pulse 2.200 LS Operation & Instruction Manual

Signet Pulse 2.200 LS Operation & Instruction Manual

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