Topic Page
Overview 3
About this Manual 3
Table of Contents 4
Overview: The purpose of the Universal Status Monitor 2 Operators and Technical Manual
is to provide an overview of the system and to detail the operation and
maintenance of the module.
Audience: This manual intended for the service technician and/or the operator of the system.
How the Manual is Organized:
USM2
Universal Status Monitor 2
section sub-section description
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Table of Contents
IMPORTANT SAFETY PRECAUTIONS ............................................................................................ 5
Precautions - Handling Circuit Boards...................................................................................... 5
1. Introduction.................................................................................................................6
1.1 USM2 Introduction ...................................................................................................... 6
1.2 Identification of ‘Old’ Vs ‘New’ USM2s ....................................................................... 6
2. Installation ..................................................................................................................8
2.1 Inverter Module Removal and Installation, XM2 ......................................................... 8
2.2 USM2 Installation, XM2 .............................................................................................. 9
2.3 Inverter Module Removal and Installation, XM2V ..................................................... 11
2.4 USM2 Installation, XM2V .......................................................................................... 12
3. Configuration.............................................................................................................13
3.1 USM2 Configuration.................................................................................................. 13
4. Signal Definitions ......................................................................................................19
4.1 USM2 Input Signals and Controls ............................................................................. 19
4.2 USM2 Output Scaling Voltage ................................................................................... 20
4.3 USM2 Signal Definition ............................................................................................ 21
5. Operation...................................................................................................................26
5.1 USM2 Operations ...................................................................................................... 26
6. Troubleshooting .........................................................................................................27
6.1 Troubleshooting the Communications Link................................................................ 27
7. Reference..................................................................................................................28
7.1 USM2 Signals, Quick Reference ................................................................................ 29
7.2 Testing and Troubleshooting, Quick Reference .......................................................... 30
Preface
Figures and Tables
Figure 1-1; “New” USM2 Identification ......................................................................................... 7
Figure 1-2; “Old” USM2 Identification .......................................................................................... 7
Figure 2-1; Inverter Module Installation ........................................................................................ 8
Figure 2-2; USM2 Front Panel & PCB........................................................................................... 10
Figure 2-3; XM2V Power Supply ................................................................................................... 11
Figure 2-4; USM2 Installation in XM2V ....................................................................................... 12
Table 3-1; “New” USM2 Set-up ..................................................................................................... 13
Table 3-2; “Old” USM2 Set-up ...................................................................................................... 14
Figure 3-1; USM2 Jumper and Switch Locations ......................................................................... 15
Figure 3-2; Jumper JP1 ................................................................................................................ 18
Figure 3-3; Jumper JP2 ................................................................................................................ 18
Table 4-1; USM2 Output Scaling Samples ................................................................................... 20
Figure 4-1; USM2 Signal Schematic ............................................................................................ 21
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IMPORTANT SAFETY PRECAUTIONS
• The XM2 Series 2 Power Supply must only be serviced by qualified personnel.
• Use proper lifting techniques whenever handling power supplies, or batteries.
• The XM2 Series 2 Power Supply contains more than one live circuit. Even though AC voltage is not
present at the input, voltage may be present at the output.
• Always switch the battery circuit breaker to OFF before connecting or disconnecting the battery pack, or
whenever installing or removing the inverter module. This greatly reduces the chance of spark.
• The battery pack, used to provide backup power, contains dangerous voltages. Battery inspection or
replacement should be performed by qualified personnel.
• Remove all rings, watches and other jewelry before servicing power supply.
• The USM2 circuit board contains static-sensitive components, please follow all appropriate ESD handling
practices.
• Always verify USM2 configuration especially after upgrading or modifying the XM2 Series 2 Power
Supply.
NOTE: ALL values are provided for troubleshooting and reference purposes ONLY. This document is not intended as
a product definition. All values and operations are subject to change.
Precautions - Handling Circuit Boards
• DO NOT attempt to install or remove any control board without first reading the XM2 power supply
manual for instructions.
• As the USM2 circuit board contains static-sensitive components, please follow all appropriate ESD
(Electro Static Discharge) handling practices. For additional safety handle the USM2 card by the edges,
and keep fingers away from card edge connectors.
WARRANTY.
Alpha Technologies, Inc., provides a LIMITED WARRANTY covering the performance of its Broadband products.
The terms and conditions of the LIMITED WARRANTY STATEMENT are contained in a separate written LIMITED
WARRANTY STATEMENT. If there are any warranty claims, the purchaser (or purchaser’s representative) must
follow the LIMITED WARRANTY guidelines, described in the applicable LIMITED WARRANTY STATEMENT.
Preface
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1.1 USM2 Introduction
This Operator’s and Technical Manual will cover the installation, signal definition, operation, and basic troubleshooting
for the USM2 (Universal Status Monitor) when used with the popular Alpha XM2 Series 2 Power Supply. This manual also
contains detailed information necessary for the successful implementation of the USM2.
The USM2 card is a logic controller PCB which may be used to upgrade any XM2 Series 2 Power Supply for the purpose
of remote status monitoring. As part of the Communications Module upgrade, the USM2 connects directly to the XM2’s
Inverter Module via an 18 pin jumper. No recalibration of the power supply is required at the time of installation.
System Concept
The USM2 remote status monitoring system is comprised of the following basic building blocks:
• An Alpha XM2 Series 2 Uninterruptible Power Supply.
• A CATV status monitoring system from an approved vendor.
• The USM2 status monitoring card.
Operating under the same status monitoring program as the amplifier system, the operator may issue commands
intended to control the operating mode of the power supply, evaluate potential fault conditions reported by the software, or
run routine checks on the power supply.
For example, the operator may issue a command that initiates a “Self-Test” mode to check the inverter circuitry, status
of the batteries, or obtain values for battery voltages. This kind of information allows for a more accurate assessment of the
operating condition, and ability to supply satisfactory uninterrupted performance of each power supply. More importantly,
proper USM2 operations allow for preventive maintenance on an “as required” basis. This has obvious advantages over a
scheduled maintenance program, since service personnel can be dispatched when required with the appropriate parts and
tools.
1.2 Identification of ‘Old’ Vs. ‘New’ USM2s
With the release and implementation of XM2 products in the 20A and 22A range, a change in the USM2 method of
configuration was required. This change affected the function of specific switch settings on the USM2 related to output
current scaling (SW1-3 and SW1-4).
It is unfortunate that the USM2 could not maintain consistent configuration switch settings from assembly version to
assembly version while still accommodating the 20A/22A XM2, however, this was not possible.
For USM2s manufactured
after
April 1999:
Configure per this manual:
• USM2; Operators and Technical Manual (p/n 704-587-B0-001, Revised 1/99 or later)
For USM2s manufactured
before
April 1999:
Configure per the documentation shipped with the unit or:
• XM2; Technical Manual (p/n 017-805-B0-001, Revision 5/98)
• Configuration Information is also provided in this manual.
Important Note Related to ‘OLD’ USM2’s When Used with XM2 Power Supplies:
Older (pre-April ’99) versions of USM2 may only be used (if configured with the proper documentation) on XM2 power
supplies configured for less than 20A maximum output current. ONLY new USM2’s are compatible with XM2 power supplies
configured for greater than 20A maximum output current.
1. Introduction
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1. Introduction
1.2 Identification of ‘Old’ Vs. ‘New’ USM2s,
continued
The “new” USM2 may be easily be identified by the board markings. All new USM2s will have the p/n “704-587-70-00x”
with their configuration marked in hand on the PCBA. e.g. “USM2-22”. This marking will be found on a yellow ‘square’ along
the bottom right edge of the board.
The “old” USM2s will have NO configuration markings on this yellow square and will have a p/n other than 704-587-70-
00x (e.g. 704-587-29-00x, 704-587-20-00x, etc.).
Using the correct documentation associated to the USM2 board when setting switches and jumpers will avoid configuration
issues related to output current settings.
Overview Of Switch Settings:
In order to represent the proper, 0.4V/AAC Output Current:
• New USM2’s in XM2 with 15A or less output must have SW1-3 and SW1-4 placed in the “OFF” position
• New USM2’s in XM2 with 20A or 22A output must have SW1-3 & SW1-4 placed in the “ON” position.
• Generally speaking, “old” USM2’s installed in XM2 with 15A or less output should have SW1-3 & SW1-4
placed in the “ON” position.
Figure 1-1; “New” USM2 Identification
Notice how the USM2 is marking in this
picture of a “new” USM2.
1) The Part Number contains “-70-”
is in this position.
2) Bears a configuration label.
Figure 1-2; “Old” USM2 Identification
Notice how the USM2 is marking in this
picture of an “old” USM2.
1) The Part Number does not
contains “-70-” in this position.
2) Has no configuration label.
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2. Installation
2.1 Inverter Module Removal and Installation, XM2
The XM2 Series 2 Power Supply comes with a field-replaceable Inverter Module, containing the inverter, battery charger
and control logic circuitry. The Inverter Module is designed to accept USM2 plug-in logic upgrades to facilitate remote status
monitoring. The Inverter Module can be removed while the power supply is running on line power. With the Inverter Module
removed, the power supply will continue to operate in a non-standby mode.
The Inverter Module will need to be removed to add the optional USM2 circuit board; the procedure detailed below should
be strictly followed:
CAUTION: ALWAYS switch the battery breaker OFF prior to removing the Inverter Module.
XM2 Inverter Module Removal Procedure:
1. Switch OFF the battery breaker. Disconnect the battery input, and the temp probe cables.
2. Disconnect all the cables (TMPR, XPDR, and SYS COM) as needed from the Communications Module.
3. Loosen the thumbscrews at the bottom of the Inverter Module.
4. To remove the Inverter Module: grasp ONLY the handle of the Inverter Module, pull firmly to release the
module from the connector. Slide the module assembly straight out.
XM2 Inverter Module Installation Procedure:
1. To re-seat the Inverter Module: align the metal shield in the upper and lower card-guides. Using ONLY
the Inverter Module’s handle (
absolutely apply no pressure of any kind to the front panel
) firmly drive
the module back into the connectors. The connectors are designed to be made with reasonable force. The
thumbscrews are not intended to aid in making these connections, but to secure the Inverter Module to
the chassis.
2. If the Inverter Module is correctly seated the front panel Smart Display will start-up, and the “Inverter
Disconnected Alarm” will NOT be active.
3. Retighten the thumbscrews. ONLY tighten by hand, Do not use tools to tighten the thumbscrews.
4. Reconnect all the cables (TMPR, XPDR, and SYS COM) as needed to the Communications Module.
5. Verify that the battery breaker is OFF, reconnect the battery input, and the temp probe cables, and then
finally switch ON the battery breaker.
Thumbscrews
Figure 2-1; Inverter Module Installation
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2.2 USM2 Installation, XM2
The optional, USM2 status monitoring upgrade plugs into the XM2 Series 2 Inverter Module. The USM2 can be
configured for various status monitoring interfaces by setting two DIP switches and two jumpers. Status monitoring
interfaces are listed according to their manufacturer, along with the associated parts in Section 3.1. The USM2 also
accommodates a tamper switch assembly to indicate unauthorized enclosure entries.
CAUTION: The USM2 PCB can contain some static sensitive components that could be easily damaged if not handled
properly.
When installing the USM2 use the following procedure:
USM2 Installation Procedure:
1. Remove the XM2 Inverter Module by:
CAUTION: ALWAYS switch the battery breaker OFF prior to removing the Inverter Module.
a) Switch OFF the battery breaker. Disconnect the battery input, and the temp probe cables from the
Inverter Module.
b) Loosen the thumbscrews at the bottom of the Inverter Module.
c) To remove the Inverter Module: grasp ONLY the handle on the right side of the Inverter Module, pull firmly
to release the module from the connector. Slide the module assembly straight out.
2. Install the USM2 on the Inverter Module:
Tools Required: #2 Philips head screwdriver.
a) The 2 x 9 pin Strip Connector (xJ4) needs to be installed onto the Inverter Module. Properly installed strip
connector will be fully seated and firmly in place.
Safety Note: DO NOT install the strip connecter if the USM2 will not be installed.
b) New USM2 will come with two snap-on supports. Position the USM2 over the strip connector and the rear
holes for the supports and carefully push into place. Verify the position of the strip connector, and that
the supports are fully seated into the Inverter Module mounting shield.
c) When replacing a USM2 the supports may already be installed. If so, align the USM2 over the supports
and gently rock onto the strip connector. Verify the position of the strip connector, and that the supports
are fully seated into the Inverter Module mounting shield.
d) Secure the USM2 card to the Inverter Module with two #6 machine screws.
2. Installation
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2. Installation
2.2 USM2 Installation, XM2
, continued
3. Setup the USM2 for proper operation (see Section 3, Configuration):
a) Before reinstalling the Inverter Module, set the two DIP switches, SW1 and SW2, and the two Jumpers,
JP1 and JP2, to the proper configuration settings for the status monitoring interface, as per Table 3-1.
Always verify USM2 configuration especially after upgrading or modifying the XM2 Series 2 Power
Supply.
4. Carefully reinstall the Inverter Module:
a) To re-seat the Inverter Module: align the metal shield in the upper and lower card-guides. Using ONLY
the Inverter Module’s handle (
absolutely apply no pressure of any kind to the front panel
) firmly drive
the module back into the connectors. The connectors are designed to be engaged with reasonable force.
The thumbscrews are not intended to aid in making these connections, but to secure the Inverter Module
to the chassis.
b) IF the Inverter Module is correctly seated, the front panel Smart Display will activate, and the “Inverter
Disconnected Alarm” will NOT be active.
c) Retighten the thumbscrews. ONLY tighten by hand, Do not use tools to tighten the thumbscrews.
d) Reconnect all the cables (TMPR, XPDR, and SYS COM) as needed to the Communications Module.
e) Verify that the battery breaker is OFF, reconnect the battery input, and the temp probe cables, and then
finally switch ON the battery breaker.
SW1
JP1
SW2
JP2
SYS COM
(J2, J1)
R40
XPDR (J3)
TMPR (J5)
Front Panel
J4
Thumbscrew
Mounting Screws
Standoff
Standoff
Figure 2-2; USM2 Front Panel & PCB
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2.3 Inverter Module Removal and Installation, XM2V
The XM Series 2V power module comes with a field-replaceable, Inverter Module assembly containing the inverter and
control logic. The Inverter Module is designed to accept USM (Universal Status Monitor) plug-in logic upgrades to facilitate
remote status monitoring. The removable module is located on the front, right-hand side of the XM2V. Follow the procedure
outlined below to remove the Inverter Module:
CAUTION: ALWAYS switch the battery breaker OFF prior to removing or inspecting the Inverter Module assembly.
NOTE: The Inverter Module assembly can be removed while the power supply is running on line power. The XM2V will
continue to operate as a non-standby power supply.
Handle the Inverter Module with extreme care. Circuit boards and logic upgrades are static-sensitive
and susceptible to damage.
NOTE: When reinstalling the Inverter Module, verify the metal shield is properly seated in the card guides and fully
inserted into the housing.
1. Turn OFF the battery breaker. Disconnect the battery input, and the temperature probe cables from the
Inverter Module. Disconnect the TMPR and XPDR cables from the Communication Module.
2. Loosen the thumbscrews at the top of the Inverter Module.
3. To remove the Inverter Module assembly, grasp the hand hole at the center of the Inverter Module. Pull
firmly to release the module from the inverter connector. Gently slide the module assembly 3/4 of the way
straight out. Disconnect the Inverter Module ribbon cable. The Inverter Module has been designed to be
removed while the power supply is operating on AC line power.
4. To reset the Inverter Module assembly, align the metal shield in the card-guides; reconnect the Inverter
Module ribbon cable and slide the Inverter Module back onto the connector. The thumbscrews are not
intended to aid in making this connection, but to secure the Inverter Module to the chassis.
5. Retighten the thumbscrews.
6. Verify that the battery breaker is still OFF, reconnect the battery input, and the temperature probe
cables, and then finally turn ON the battery circuit breaker.
2. Installation
Figure 2-3; XM2V Power Supply
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2.4 USM2 Installation, XM2V
The optional, USM2 status monitoring upgrade plugs into the XM2V Inverter Module. The PCB can be configured for
various status monitoring interfaces by setting two DIP switches and two jumpers. Status monitoring interfaces are listed
according to their manufacturer, along with the associated parts. The USM2 also accommodates a tamper switch input to
indicate unauthorized enclosure entries.
CAUTION: The USM2 PCB contains static sensitive components that can be easily damaged if not handled properly.
USM2 Installation Procedure:
1. Switch the battery circuit breaker OFF.
2. Remove the battery input cable, and the temperature probe cable.
3. Remove the Inverter Module; loosen the thumbscrews located at the top of the panel, grasp the hand
hold at the center of the Inverter Module, pull firmly to release the module from the inverter connector.
Gently slide the module assembly 3/4 of the way straight out. Disconnect the Inverter Module ribbon
cable.
4. Set the two switches (SW-1 and SW-2) and two Jumpers (JP-1 and JP-2) on the USM2 to the proper
configuration settings for your status monitoring interface, as per the table on next page.
5. Install the interconnect ribbon cable to J-4 and the matching connector on the Inverter Module.
6. Snap the pins of the USM2 card onto the Inverter Module shield.
7. Install the two screws though the USM2 assembly into the inverter shield.
8. Carefully reinstall the Inverter Module and tighten the thumbscrews.
9. Reconnect the battery input cable and the remote temperature sensor.
10. Switch the battery circuit breaker ON.
2. Installation
sys/comm
tamper
transponder
ribbon cable SW-1 SW-2
JP 1
JP 2
J 4
Figure 2-4; USM2 Installation in XM2V
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704-587-B0-003 Rev.D
3. Configuration
C–1 = Jumper Center
Contact (C) to Pin-1 (+5V)
C–2 = Jumper Center
Contact (C) to Pin-2 (+15 V)
C–3 = Jumper Center
Contact (C) to Pin-3 (+24 V)
Jumper JP1
Switch SW1
ON
OFF
Switch SW2
ON
OFF
Jumper JP2
1–2 = Jumper
Pin-1 to Pin-2 (AC)
2–3 = Jumper
Pin-2 to Pin-3 (DC)
3.1 USM2 Configuration,
continued
6: 6:
Table 3-2; “Old” USM2 Set-up
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-3
-3
6:
6:
3. Configuration
3.1 USM2 Configuration,
continued
Always verify USM2 configuration especially after upgrading or modifying the XM2 Series 2 Power Supply.
Function Switch SW1 Reference
The following information describes each switch position (1–8) for the DIP switch SW1. SW1 is an eight switch
component used primarily to select analog scaling and digital signal polarity for the USM2 card.
SW1 (1 and 2): Inverter Battery Voltage Scaling Select
SW1, positions 1 and 2 are used together to select the appropriate scaling for the XM2 Series 2 battery
voltage measurement.
SW1 (1) SW1 (2) Battery Scaling
OFF OFF 0.1VDC/VDC
OFF ON 0.3VDC/VDC
ON OFF 0.3VDC/VDC Same as previous setting.
ON ON 0.5VDC/VDC
SW1 (3): Output Current Scaling
SW1, position 3 is used to select the appropriate scaling for the XM2 Series 2 AC OUTPUT CURRENT#1.
SW1 (3) Output Current #1
OFF 0.4VDC/AAC for Output Current less than 20A.
ON 0.4VDC/AAC for Output Current equal to or greater than 20A.
The switch settings for the Output Current Scaling are for “new” USM2, see Note following SW1 (4) on the next page.
Figure 3-1; USM2 Jumper and Switch Locations
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3.1 USM2 Configuration,
continued
SW1 (4): Output Current #2 Scaling
SW1, position 4 is used to select the appropriate scaling for the XM2 Series 2 AC OUTPUT CURRENT #2.
SW1 (4) Output Current #2
OFF 0.4VDC/AAC for Output Current less than 20A.
ON 0.4VDC/AAC for Output Current equal to or greater than 20A
NOTE: In order to represent the proper, 0.4V/AAC Output Current:
• New USM2’s in XM2 with 15A or less output must have SW1-3 and SW1-4 placed in the “OFF” position
• New USM2’s in XM2 with 20A or 22A output must have SW1-3 & SW1-4 placed in the “ON” position.
• Generally speaking, “old” USM2’s installed in XM2 with 15A or less output should have SW1-3 & SW1-4
placed in the “ON” position.
SW1 (5): Output Voltage DC Scaling Select (DC)
SW1, position 5 is used to select the scaling for the DC representation of the XM2 Series 2 AC OUTPUT
VOLTAGE measurement (if configured for DC scaling).
SW1 (5) Output Volts (DC)
OFF 0.25VDC/VAC
ON 0.15VDC/VAC
SW1 (6): Tamper Status Voltage Limit Select
SW1, position 6 is used to select the maximum voltage applied to the system’s transponder “Tamper Status”
pin.
SW1 (6) Tamper Status Voltage
OFF Pulled to AUX DC (AUX DC volts selected by JP1)
ON Pulled to +5VDC
SW1 (7): Tamper Status Polarity Select
SW1, position 7 is used to select between inverted or non-inverted signal polarity for the system’s transponder
“Tamper Status” pin #7 of J3.
SW1 (7) Tamper Status
OFF Not inverted (switch opens; Tamper Status goes HIGH)
ON Inverted (switch opens; Tamper Status goes LOW)
SW1 (8): UPS Alarm Signals Polarity Select
SW1, position 8 is used to select the active state polarity of all alarm signals (General, Inverter, and Output).
SW1 (8) UPS Alarm Polarity (Equipment Fail,
Standby / Line Fail, Output Fail)
OFF Not inverted (alarm active; pin goes HIGH)
ON Inverted (alarm active; pin pulled LOW)
The alarm active states are defined as:
Pin 6 - Equipment Failure: A UPS equipment battery failure alarm is present (TEST FAIL, LOW BATTERY)
Pin 3 - Standby / Line Fail: Inverter is operating.
Pin 10 - Output Fail Alarm: UPS has no output.
3. Configuration
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3.1 USM2 Configuration,
continued
Function Switch SW2 Reference
The following information describes the each switch position (1–4) for the DIP switch SW2. This switch is a four switch
component and is used primarily to select/deselect pull-ups to digital signals for the USM2 card.
SW2 (1): Equipment Fail Alarm Pull-up Select
SW2, position 1 is used to enable or disable the 10k Ohm pull-up to AUX DC on the system’s transponder
“Equipment Fail Alarm” pin #6 of J3.
SW2 (1) Equipment Fail Alarm Pull-up
OFF Open collector output with no pull-up.
ON Open collector output with 10k pull-up to AUX DC.
NOTE: For “Tri-level” alarm (see SW2 (2) below), SW2 (1) must also be on.
SW2 (2): Tri-level Alarm Enable/Disable
SW2, position 2 is used to enable or disable the “Tri-level” alarms on the “Equipment fail and Standby / Line
fail” Alarm pins (pin #6 & pin #3 of J3, respectively).
SW2 (2) Tri-level Alarm
OFF Tri-level alarm function is disabled.
ON Tri-level alarm function is enabled.
NOTE: For proper operation of “Tri-level” alarm, SW2 (1) and SW2 (3) must also be on in conjunction with SW2 (2).
SW2 (3): Standby/Line Fail Alarm Pull-up Select
SW2, position 3 is used to enable or disable the 10k Ohm pull-up to AUX DC on the system’s transponder
“Standby / Line Fail” pin (pin #3 of J3).
SW2 (3): Standby/Line Fail Alarm Pull-up
OFF Open collector output with no pull-up.
ON Open collector output with 10k pull-up to AUX DC.
NOTE: For “Tri-level” alarm see SW2 (2), SW2 (3) must also be ON.
SW2 (4): Output Fail Alarm Pull-up Select
SW2, position 4 is used to enable or disable the 10k Ohm pull-up to AUX DC on the system’s transponder
“Output Alarms” pin (Pin #10 of J3).
SW2 (4) Output Fail Alarm Pull-up
OFF Open collector output with no pull-up.
ON Open collector output with 10k pull-up to AUX DC.
3. Configuration
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3. Configuration
To select between fixed AC or variable DC scaling of the XM2 Series 2 output voltage, set the jumper as follows:
JP2 (1–2): AC Scaled XM2 Series 2 Output Voltage
This position selects AC scaling (0.5VAC per VAC Output Voltage).
JP2 (2–3): DC Scaled XM2 Series 2 Output Voltage
This position selects DC scaling. The actual scaling ratio is defined by SW1 (5).
3.1 USM2 Configuration,
continued
Jumper JP1 Reference: Auxiliary DC Voltage Select
The jumper designated JP1 is used to select the voltage of AUX DC delivered to the system’s transponder. This jumper
is configured by removing and placing the shorting connector on to one of the three positions (from the contact designated
as “C” for center).
To select between the various AUX DC output voltages supplied to the system’s transponder, set the jumper as follows:
JP1 (C–1):
Selects +5 V for the AUX DC output.
JP1 (C–2):
Selects +15 V for the AUX DC output.
JP1 (C–3):
Selects +24 V for the AUX DC output.
Jumper JP2 Reference: Output Voltage C or DC Scaling Select
The jumper designated JP2 is used to select either fixed scaling AC representation or variable scaling DC representation
of the XM2 Series 2 output voltage.
C–3C–2
C–1
1–2
2–3
Figure 3-2; Jumper JP1
Figure 3-3; Jumper JP2
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4.1 USM2 Input Signals and Controls
Definition of what is acceptable for HIGH and LOW signal levels used throughout the USM2:
HIGH is typically defined as AUX DC Voltage ± 10% (+5VDC, +15VDC, or +24VDC as set by configuration). Voltage
exceeding AUX DC is abnormal, but will not likely damage the USM2.
(90%AUX DC < HIGH < AUX DC)
LOW is typically defined as 0VDC, however any nonnegative voltage between 0VDC and +1VDC will be accepted by the
USM2 as LOW.
(0VDC < LOW < 1VDC)
USM Input Results:
Defines affect of USM2 inputs on the XM2.
Charger Control (pin 9)
LOW
XM2’s Battery Charger commanded to ‘Accept’ mode.
HIGH
XM2’s Battery Charger allowed to return to ‘Float’ mode
NOTE: Due to design improvements and changes the Charger Control function is no longer supported, however,
some “old” USM2 may still have this function.
Test/Reset Control (pin 11)
LOW
XM2 commanded to initiate a remote inverter test. Successful completion of an inverter test will reset / clear
a latched Equipment Fail Alarm.
HIGH
Inverter test command released, XM2 may exit test.
USM2 Input Legend:
LOW:
Status monitoring device pulls USM2 input to common (pin 1 and/or pin 12). (0VDC < LOW < 1VDC)
HIGH:
Status monitoring device opens connection, allowing input to be pulled up to Aux DC, or drives input high.
(4VDC < HIGH < AUX DC)
IMPORTANT NOTE: In order for the USM2 to function correctly, OUTPUT (N) must be grounded to the XM2’s chassis!
During normal operation this is automatically done though the SPI, but during bench testing this ground will
have to be manually maintained, by placing a jumper between the Output Neutral and chassis ground.
4. Signal Definitions
20
©2000 ™
704-587-B0-003 Rev.D
4.2 USM2 Output Scaling Voltage
USM Output Scaling Results:
Defines affect of XM2 operations on the USM2 output scalings.
Auxiliary DC Out (J3, pin 2)
Auxiliary DC output voltage is selected by JP1 and can provide: +5VDC, +15VDC, or +24VDC. This voltage
is used to provide transponder power.
Output Voltage level (J3, pin 4)
The scaling for 60VAC level is selected by JP2 and SW1(5) which can provide: 0.5VAC, 0.25VDC, or 0.15VDC
per VAC output.
Battery Voltage (J3, pin 5)
The scaling for Battery voltage is selected by SW1(1) and SW1(2) which can provide: 0.5VDC, 0.3VDC,
or 0.1VDC per VDC battery voltage.
AC Output Current #1 (J3, pin 8)
The scaling for AC output current #1 is selected by SW1(3) which will provide: 0.4VDC per ampere AC output.
AC Output Current #2 (J3, pin 13)
The scaling for AC output current #2 is selected by SW1(4) which will provide: 0.4VDC per ampere AC output.
IMPORTANT NOTE: In order for the USM2 to function correctly, OUTPUT (N) must be grounded to the chassis of the XM2
Series 2 power supply!
4. Signal Definitions
1ELPMAS
2SMX
TUPTUO
GES-2MSU MA-2MSU GT-2MSU
tuOCDyrailixuAA/NCDV5+CDV51+CDV5+
egatloVtuptuOCACAV36CAV5.13CAV5.13CDV57.51
egatloVyrettaBCDV4.14CDV7.02CDV7.02CDV41.4
tnerruCtuptuOA7CDV8.2CDV8.2CDV8.2
2ELPMAS
2SMX
TUPTUO
GES-2MSU MA-2MSU GT-2MSU
tuOCDyrailixuAA/NCDV5+CDV51+CDV5+
egatloVtuptuOCACAV78CAV5.84CAV5.84CDV52.42
egatloVyrettaBCDV6.93CDV8.91CDV8.91CDV69.3
tnerruCtuptuOA41CDV6.5CDV6.5CDV6.5
Table 4-1; USM2 Output Scaling Samples
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