USM2 Universal Status Monitor 2

Transcription

1 USM2 Universal Status Monitor 2 Operator s and Technical Manual Effective: May, 2001

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3 USM2 Universal Status Monitor 2 Topic Page Overview 3 About this Manual 3 Table of Contents 4 Overview: Audience: 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. This manual intended for the service technician and/or the operator of the system. How the Manual is Organized: section sub-section description 3UHIDFH 7DEOHÃRIÃRQWHQWV *HQHUDOÃ6DIHW\Ã3UHFDXWLRQVÃDQGÃ,QVWDOODWLRQÃ1RWHV,QWURGXFWLRQ 860Ã,QWURGXFWLRQ,GHQWLILFDWLRQÃRIÃ2OGÃVÃ1HZÃ860V,QVWDOODWLRQ,QYHUWHUÃ0RGXOHÃ5HPRYDOÃDQGÃ,QVWDOODWLRQÃ;0 860Ã,QVWDOODWLRQÃ;0,QYHUWHUÃ0RGXOHÃ5HPRYDOÃDQGÃ,QVWDOODWLRQÃ;0 860Ã,QVWDOODWLRQÃ;0 RQILJXUDWLRQ RQILJXUDWLRQ 6LJQDO 'HILQLWLRQV 860Ã,QSXWÃ6LJQDOVÃDQGÃRQWUROV 860Ã2XWSXWÃ6FDOLQJÃROWDJH 860Ã6LJQDOÃ'HILQLWLRQ 2SHUDWLRQ 860Ã2SHUDWLRQV 7URXEOHVKRRWLQJ 7URXEOHVKRRWLQJÃWKHÃRPPXQLFDWLRQVÃ/LQN 5HIHUHQFH 860Ã6LJQDOVÃ4XLFNÃ5HIHUHQFH 7HVWLQJÃDQGÃ7URXEOHVKRRWLQJÃ4XLFNÃ5HIHUHQFH

4 Preface Table of Contents IMPORTANT SAFETY PRECAUTIONS... 5 Precautions - Handling Circuit Boards Introduction USM2 Introduction Identification of Old Vs New USM2s Installation Inverter Module Removal and Installation, XM USM2 Installation, XM Inverter Module Removal and Installation, XM2V USM2 Installation, XM2V Configuration USM2 Configuration Signal Definitions USM2 Input Signals and Controls USM2 Output Scaling Voltage USM2 Signal Definition Operation USM2 Operations Troubleshooting Troubleshooting the Communications Link Reference USM2 Signals, Quick Reference Testing and Troubleshooting, Quick Reference 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 Figure 2-3; XM2V Power Supply Figure 2-4; USM2 Installation in XM2V Table 3-1; New USM2 Set-up Table 3-2; Old USM2 Set-up Figure 3-1; USM2 Jumper and Switch Locations Figure 3-2; Jumper JP Figure 3-3; Jumper JP Table 4-1; USM2 Output Scaling Samples Figure 4-1; USM2 Signal Schematic B0-003 Rev.D

5 Preface 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 B0-003 Rev.D

6 1. Introduction 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 1: Configure per this manual: USM2; Operators and Technical Manual (p/n B0-001, Revised 1/ or later) For USM2s manufactured before April 1: Configure per the documentation shipped with the unit or: XM2; Technical Manual (p/n B0-001, Revision 5/8) Configuration Information is also provided in this manual. Important Note Related to OLD USM2 s When Used with XM2 Power Supplies: Older (pre-april ) 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 B0-003 Rev.D

7 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 x 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 x (e.g x, x, 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 B0-003 Rev.D

8 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 B0-003 Rev.D

9 2. Installation 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 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 B0-003 Rev.D

10 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. Standoff SYS COM (J2, J1) R40 TMPR (J5) XPDR (J3) J4 JP2 SW1 JP1 SW2 Mounting Screws Standoff Front Panel Thumbscrew Figure 2-2; USM2 Front Panel PCB B0-003 Rev.D

11 2. Installation 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. Figure 2-3; XM2V Power Supply B0-003 Rev.D

12 2. Installation 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.. Reconnect the battery input cable and the remote temperature sensor. 10. Switch the battery circuit breaker ON. sys/comm J 4 JP 2 JP 1 tamper transponder ribbon cable SW-1 SW-2 Figure 2-4; USM2 Installation in XM2V B0-003 Rev.D

13 3. Configuration 3.1 USM2 Configuration 860 ;3'5 RQILJ %DWW ' 2XWSXW XUUHQW 6: ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 6: ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ -3ÃÃÃÃ Å6(*Å )) 2)) 2)) 21 2)) )) Å6(*Å )) 21 2)) )) Å6(*Å 2)) 2)) 2)) 2)) 2)) 21 2)) )) Å6(*Å 2)) 2)) )) 21 2)) )) Å0Å )) 2)) 2)) 2)) 2)) )) Å0Å Y )) 2)) 2)) )) Å0Å 2)) 21 2)) 2)) 2)) 2)) 2)) )) Å0Å 2)) )) 2)) 2)) )) ÅÅ )) 2)) 2)) 2)) 2)) ÅÅ Y )) 2)) 2)) ÅÅ 2)) 21 2)) 2)) 2)) 2)) 2)) ÅÅ 2)) )) 2)) 2)) Å6Å )) 2)) 2)) 2)) 2)) 21 2)) 2)) 2)) 2)) 8606 Å6Å Y )) 2)) 2)) 21 2)) 2)) 2)) 2)) 8606 Å6Å 2)) 21 2)) 2)) 21 2)) 2)) 21 2)) 2)) 2)) 2)) 8606 Å6Å 2)) )) 2)) 21 2)) 2)) 2)) 2)) 8607 Å7Å )) 2)) 2)) 2)) 2)) Å7Å Y )) 2)) 2)) Å7Å 2)) 21 2)) 2)) 2)) 2)) 2)) Å7Å 2)) )) 2)) 2)) ' Å'Å )) 2)) 2)) 21 2)) )) ' Å'Å Y )) 21 2)) )) ' Å'Å 2)) 21 2)) 2)) 2)) 21 2)) )) ' Å'Å 2)) )) 21 2)) )) Å0Å )) 2)) 2)) 21 2)) )) * Å7*Å 1 ÃÃ 2)) 2)) 2)) 2)) )) * Å7*Å 1 Ã 2)) 2)) )) Table 3-1; New USM2 Set-up B0-003 Rev.D

14 3. Configuration 3.1 USM2 Configuration, continued 6 : 6 : 6WDQGDUG 7UDQVSRQGHUV Ã'()8/ )) 21 2)) )) Ã7(;61,7/Ã6,* )) 2)) 2)) //Ã-(552/' /,)(/,1( )) 2)) 2)) )) Ã25 48,.Ã/( )) 2)) 2)) Ã0*12; Ã'66 2)) 2)) 2)) 2)) 21 2)) 2)) )) Ã6,(17,), 7/17Ã )) 2)) 2)) 21 2)) 2)) 2)) 2)) 8606(* )) 21 2)) )) (*ÃÃÃ%77 2)) 2)) )) 21 2)) )) ' :'(%281( )) 21 2)) )) ,(17,), 7/17ÃÃ%77(5< 2)) )) 2)) 2)) 21 2)) 2)) 2)) 2)) Table 3-2; Old USM2 Set-up ON 21 ON 21 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 OFF Switch SW1 1 2 = Jumper Pin-1 to Pin-2 (AC) 2 3 = Jumper Pin-2 to Pin-3 (DC) Jumper JP2 OFF Switch SW B0-003 Rev.D

15 3. Configuration 3.1 USM2 Configuration, continued : 6: Figure 3-1; USM2 Jumper and Switch Locations 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) OFF OFF ON ON SW1 (2) OFF ON OFF ON Battery Scaling 0.1VDC/VDC 0.3VDC/VDC 0.3VDC/VDC Same as previous setting. 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 B0-003 Rev.D

16 3. Configuration 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) OFF ON Output Volts (DC) 0.25VDC/VAC 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) OFF ON Tamper Status Voltage Pulled to AUX DC (AUX DC volts selected by JP1) 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) OFF ON Tamper Status Not inverted (switch opens; Tamper Status goes HIGH) 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) OFF ON UPS Alarm Polarity (Equipment Fail, Standby / Line Fail, Output Fail) Not inverted (alarm active; pin goes HIGH) 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 B0-003 Rev.D

17 3.1 USM2 Configuration, continued Function Switch SW2 Reference 3. Configuration 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) OFF ON Equipment Fail Alarm Pull-up Open collector output with no pull-up. 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) OFF ON Tri-level Alarm Tri-level alarm function is disabled. 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) OFF ON Output Fail Alarm Pull-up Open collector output with no pull-up. Open collector output with 10k pull-up to AUX DC B0-003 Rev.D

18 3. Configuration 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). C 1 C 2 Figure 3-2; Jumper JP1 C 3 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 Figure 3-3; Jumper JP2 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) B0-003 Rev.D

19 4. Signal Definitions 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. (0%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 ) 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 B0-003 Rev.D

20 4. Signal Definitions 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! SAMPLE 1 XMS2 OUTPUT USM2-SEG USM2-AM USM2-TG Auxiliary DC Out N/ A + 5VDC + 15VDC +5VDC AC Output Voltage Battery Output Voltage Current 63VAC 31.5VAC 31.5VAC 15.75VDC 41.4VDC 20.7VDC 20.7VDC 4.14VDC 7A 2.8VDC 2.8VDC 2.8VDC SAMPLE 2 XMS2 OUTPUT USM2-SEG USM2-AM USM2-TG Auxiliary DC Out N/ A + 5VDC + 15VDC +5VDC AC Output Voltage Battery Output Voltage Current 87VAC 48.5VAC 48.5VAC 24.25VDC 3.6VDC 1.8VDC 1.8VDC 3.6VDC 14A 5.6VDC 5.6VDC 5.6VDC Table 4-1; USM2 Output Scaling Samples B0-003 Rev.D

21 4. Signal Definitions 4.3 USM2 Signal Definition This Section provides specific details of all signals (input and output) provided on the USM2 s XPDR and TMPR Connectors when set up as an USM2 (Default setting). 7DPSHU6Z5WQ 7DPSHU6Z 2XWSXWÃXUUHQWÃ *URXQG 7HVW5HVHW 2XWSXWÃ)DLO 4XLFNÃKDUJH 2XWSXWÃXUUHQWÃ 7DPSHUÃ6WDWXV 6HOI7HVWÃ)DLO %DWWHU\ÃROWDJH Ã2XWSXWÃROWDJH 6WDQGE\/LQHÃ)DLO X[Ã'Ã2XWSXW *URXQG - - Figure 4-1; USM2 Signal Schematic Name: Common Pin: J3-1 Signal Type: Ground reference / return Referenced to: N/A Description: Ground / return reference for ALL signals (analog, input output) on the USM. Same as pins J3-12 and J5-2. Name: Auxiliary DC Out Pin: J3-2 Signal Type: Power Referenced to: Common (J3-1, J3-12) Description: This pin provides power for transponder pull up resistors as needed. Auxiliary DC Out is not intended to provide complete logic transceiver power to the transponder. Parameters: Current drawn from this pin should NOT exceed 100mA under any circumstance. Auxiliary DC Out is overcurrent protected by the Fuse, F1, which is a 100mA, 250V Slow Blow fuse. How to test: Verify voltage on pin #2 is +5VDC, +15VDC, or +24VDC; as set by configuration. Name: Standby / Line Fail Pin: J3-3 Signal Type: USM2 Discrete output Referenced to: Common (J3-1, J3-12) Description: This USM2 output indicates the state of the XM2 inverter. Active Means: The XM2 s inverter is ON, and/or the line input has failed. Active State: LOW Inactive Means: The XM2 s inverter is NOT ON. Inactive State: HIGH How to test: With the XM2 s inverter ON, verify LOW on J B0-003 Rev.D

22 4. Signal Definitions 4.3 USM2 Signal Definition, continued Name: AC Output Voltage Pin: J3-4 Signal Type: USM2 Analog Output Referenced to: Common (J3-1, J3-12) Description: This pin provides a scaled, analog representation of the XM2 s output voltage. Parameters: This analog output should be 0.5VAC, 0.25VDC, or 0.15VDC per VAC of the XM2 s output. A transponder will slightly load this analog pin when connected to a USM2. Measured with transponder connected, the scaled output voltage will be approximately 2% lower than expected (e.g. with a 60VAC output, instead of 30VAC, a USM2 scaled output connect to a transponder may read ~2.4VAC). How to test: Verify voltage on pin #4 is 0.5VAC, 0.25VDC, or 0.15VDC per VAC of the XM2 s output, as set by configuration. Name: Battery Voltage Pin: J3-5 Signal Type: USM2 Analog Output Referenced to: Common (J3-1, J3-12) Description: This pin provides A scaled, analog representation of the XM2 s battery string voltage. Parameters: This analog output should read 0.1VDC, 0.3VDC, or 0.5VDC per VDC of the XM2 s battery voltage, as set by configuration SW1 (pins 1 and 2). How to test: Verify voltage on J3-5 is 0.1 VDC, 0.3VDC, or 0.5VDC per VDC of the XM2 s battery voltage, as set by configuration. Name: Equipment Fail Alarm Pin: J3-6 Signal Type: USM2 Discrete Output Referenced to: Common (J3-1, J3-12) Description: This USM2 output indicates the general health of the XM2. Active Means: An active Equipment Fail Alarm pin indicates a latched failure of an automated, local or remote, inverter test or some other major alarm within the XM2. No matter the cause, an Equipment Fail Alarm indicates the XM2 will NOT perform as required and should be serviced. Once this condition has been detected by the USM2, the Equipment Fail Alarm will stay active until reset by the successful completion of a Self Test (either locally or remotely). Active State: LOW Inactive Means: Utility AC line input is present and no inverter failures have been detected. Inactive State: HIGH How to Test: Verify that Equipment Fail Alarm is not currently latched HIGH. With utility AC line and batteries present, initiate a remote inverter test (see description of Pin 11 on page 1). Next, simulate a battery failure by Switching XM2 s battery circuit breaker OFF, the Equipment Fail Alarm should go LOW. Reapply the battery circuit breaker; the General Alarm will stay LOW. To clear the Equipment Fail Alarm, initiate an inverter test, wait one minute, stop the inverter test B0-003 Rev.D

23 4. Signal Definitions 4.3 USM2 Signal Definition, continued Name: Tamper Switch Status Pin: J3-7 Signal Type: USM2 Discrete Output Referenced to: Common (J3-1, J3-12) Description: USM2 output indicates the current state of the XM2 s enclosure tamper switch. This is a non-latching type alarm. Active Means: The enclosure door is opened or the tamper switch is disconnected. Active State: HIGH Inactive Means: The enclosure tamper switch is properly connected and the door is closed. Inactive State: LOW How to Test: Disconnect any tamper switch from the USM2 TMPR connector. Short USM2 TMPR connector; the USM2 tamper status (pin #7) should go LOW. Remove the short on USM2 TMPR connector (open circuit) and the Tamper Status output should go HIGH. Name: Output Current #1 Pin: J3-8 Signal Type: USM2 Analog Output #1 Referenced to: Common (J3-1, J3-12) Description: This USM2 analog output is a DC approximation of the total XM2 AC output #1 current. Parameters: 0.4VDC per AC ampere XM2 output. How to Test: Verify voltage on J3-8 is 0.4VDC per AC ampere XM2 output #1. NOTE: Due to design improvements and changes the Quick Charge function is no longer supported, however, some old USM2 may still have this function. The Quick Charge definition remains only as a reference, current configurations do not have this feature. Name: Quick Charge (Not used in newer versions of the USM2) Pin: J3- Signal Type: USM2 Discrete Input Referenced to: Common (J3-1, J3-12) Description: This USM2 input controls the mode of the XM2 charger. Allowing remote initiation of a charger Accept mode. This control signal originates from the transponder. Active Means: The XM2 has been commanded to initiate and hold a battery charger Accept mode. Active State: LOW Inactive Means: The XM2 charger is no longer commanded to hold an Accept mode. The charger may return to Float. Disconnected from a transponder, this USM2 input defaults to the inactive state. Inactive State: HIGH How to test: To perform a test of the Charger Accept pin, disconnect the transponder from the USM2. With line and battery applied to the XM2, carefully short hold the Charger Accept J3- to ground (J3-1). The XM2 charger should immediately enter Accept mode, verified by the Charger Mode screen on the Smart Display. Release J3- from ground and the charger should return to Float mode B0-003 Rev.D

24 4. Signal Definitions 4.3 USM2 Signal Definition, continued Name: Output Fail Alarm Pin: J3-10 Signal Type: USM2 Discrete Output Referenced to: Common (J3-1, J3-12) Description: This USM2 signal indicates the state of the AC output. A non-latching signal, the Output Alarm will match the state of the power supply output in real-time. Active Means: The XM2 s AC output has failed. Active State: LOW Inactive Means: The XM2 s AC output is OK. Active State: HIGH How to Test: Remove the XM2 s AC output fuse; verify J3-10 is LOW. Return the XM2 s fuse; verify J3-10 is HIGH. Name: Test/Reset Pin: J3-11 Signal Type: USM2 Discrete Input Referenced to: Common (J3-1, J3-12) Description: This USM2 input controls remote test of the XM2 s inverter and allows reset of a latched USM2 Equipment Fail Alarm. This control signal originates from the transponder. Active Means: An active Test / Rest pin indicates that the XM2 has been commanded to initiate and hold a remote inverter test. Active State: LOW, a transition from HIGH to LOW will indicate to the USM2 that the Test/ Reset pin has been activated. The pin will be considered active by the USM2 for the duration that the pin is held LOW. Inactive Means: The XM2 is not commanded to perform or hold a remote inverter test. Any previously held test will be ended when the input is transitioned from active to inactive. Disconnected from a transponder the USM2-SEG input defaults to the inactive state. Inactive State: HIGH How to test: To perform a test at the XM2, disconnect the transponder from the USM2. With line and battery applied to the XM2, carefully short and hold the Test/ Reset J3-11 to ground (J3-1), the XM2 will immediately start inverter test mode. Release J3-11 from ground and the inverter test mode will end, and any latched Equipment Fail Alarm should clear. Resetting a latched Equipment Fail Alarm: If a USM2 Equipment Fail Alarm is latched when the Test/Reset pin is made active and a successful inverter test is completed, the Equipment Fail Alarm will be cleared (i.e., J3-6 change to inactive) B0-003 Rev.D

25 4. Signal Definitions 4.3 USM2 Signal Definition, continued Name: Common Pin: J3-12 Signal Type: Ground reference / return Referenced to: N/A Description: Ground / return reference for ALL signals (analog, input output) on the USM. Same as pins 1 and 15. Name: Output Current #2 Pin: J3-13 Signal Type: USM2 Analog Output #2 Referenced to: Common (J3-1, J3-12) Description: This USM2 analog output is a DC approximation of the total XM2 AC output #2 current. Parameters: 0.4VDC per AC ampere XM2 output. How to Test: Verify voltage on J3-13 is 0.4VDC per AC ampere XM2 output #2. Name: Tamper Switch In Pin: J5-1 Signal Type: USM2 Discrete Input (dry contact switch) Referenced to: J5-2 Description: Dry contact tamper switch input. Left open circuit, this USM2 input will be pulled up to +5VDC Active Means: The enclosure s door is open or the tamper switch is not connected. Active State: OPEN Inactive Means: The enclosure s door is closed. Inactive State: SHORT How to test: See How to Test for J3-7 (page 23). Name: Tamper Switch Return Pin: J5-2 Signal Type: Ground Reference / return Referenced to: N/A Description: Return / ground for Tamper switch. 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. All Values used as examples are for USM2-SEG, which is the factory default USM2 configuration B0-003 Rev.D

26 5. Operation 5.1 USM2 Operations USM2 Start up and Test Procedure The XM2 power supply should be fully tested before attempting any USM2 operations. Refer to the XM2 technical manual for details. Once the power supply has been verified as GOOD the USM2 can then be tested as follows: 1. Verify the USM2 installation by checking: Configurations settings of switches and jumpers on the USM2. USM is properly installed onto Communication Module, and that the Communication Module is correctly installed into the XM2 power supply. Tamper switch is properly installed and connected. Data cable from the USM2 to the transponder is correctly installed. 2. Unplug transponder s data cable from the USM2. 3. Using a true RMS multimeter, verify the USM2 s analog data (set by configuration) on the J3 connector by checking (ground on J3-1): Auxiliary DC output on J3-2 AC Output Voltage Level on J3-4 Battery Level output on J3-5 Output Current #1 level on J3-8 Output Current #2 level on J Using a true RMS multimeter, verify the USM2 s Digital data (set by configuration) on the J3 connector by checking (ground on J3-1): Standby Status Alarm J3-3, active any time inverter in ON. Equipment Fail Alarm J3-6, active if test failure or low battery condition. Tamper Alarm J3-7, active when the enclosure s door is open. Output Alarm J3-10, active when the XM2 s AC output has failed. 5. Verify remote USM2 control on the J2 connector by shorting to ground (J3-1): Test/Reset J3-11, shorted XM2 inverter Test ON, open inverter Test OFF. NOTE: Passing test steps 1-5 is a very good indication that the USM2 is operating correctly, if any of the tests fail; retest, verify failure, replace USM2 as needed. 6. Plug transponder s data cable back into the USM2. Repeat test steps 3-5; local results should remain the same. If results do NOT remain the same, this is an indication of a possible transponder failure. 7. Review analog data at status monitoring center, reported data should be similar to measured data (step 6). 8. Initiate an inverter test command from the status monitoring center, the power supply should go into test as commanded. Monitor command signals from the transponder on the USM connector J2 using a multimeter by checking: Test/Reset J3-11, active XM2 inverter ON, inactive inverter OFF. NOTE: Test steps 6-8 are used to verify the transponder and the status monitoring system, if any of the tests fail; retest, verify failure, troubleshoot status monitoring system (less USM2) as needed B0-003 Rev.D

27 6. Troubleshooting 6.1 Troubleshooting the Communications Link Occasionally the communications link between the XM2 power supply and the headend site may appear to break down; updates to and from the power supply may not take place, or data received may be faulty. When this happens isolate and correct the failed elements in a precise fashion to avoid extended troubleshooting times or possibly spreading a potential failure from site to site. Symptom: Diagnosis: Repair Solution: No Remote Control (Inverter Test) To start, verify that USM2 J3-11 (Test/Reset) are HIGH; change state via remote command pins should go LOW. If the remote commands are present, goes from HIGH to LOW, replace the USM2; if not, troubleshoot the transponder and RF section. Symptom: Diagnosis: Repair Solution: Incorrect Scaling voltage reported. Verify that the USM2 is configured correctly; then verify the XM2 Output in question; verify USM2 scaling. If the scaling voltage reported is NOT correct, replace the USM2. If scaling voltages are correct, troubleshoot the transponder and RF section. Symptom: Diagnosis: Repair Solution: Status monitoring reports Comm Error Verify that the USM2 is correctly connected to the transponder, and that the transponder is correctly connected to the RF section. Correct connections as needed. Symptom: No Auxiliary DC output Diagnosis: Verify Auxiliary DC output by checking voltage on J3-2 with the USM2 disconnected from the status monitor; if voltage is correct, reconnect status monitor and check again. Repair Solution: With the USM2 disconnected from the transponder the Auxiliary DC voltage is NOT correct, replace the USM2. If AUX DC voltages is correct with transponder, troubleshoot the transponder and RF section B0-003 Rev.D

28 7. Reference This page intentionally blank B0-003 Rev.D

29 7. Reference 7.1 USM2 Signals, Quick Reference # CUT HERE PIN 2 SIGNAL NAME Tamper Switch Return TYPE SIGNAL DESCRIPTIO N ( Ground) Return for tamper switch input to USM2 (same as J3 pins 1 12). 1 Tamper Switch Discrete (In) Tamper switch input to USM2 13 Output Current 2 A nalog Scaled analog representation of UPS output current #2. Scaling 0.4VDC per amp AC out. 12 Ground G round Ground reference for all signal and power (same as J5 pin 2, J3 pin 1). 11 Test / Reset Discrete (In) Command to UPS to initiate hold a UPS battery / inverter test. Pulling the signal to ground (from Aux DC) for >100mS will initiate an inverter test. Release will allow the UPS test to end. Alternatively, if the UPS has latched Equipment Fail Alarm, a successful completion of a test will clear the alarm. 10 Output Fail Alarm Discrete (Out) Indicates state of UPS output. Open collector transistor, can configuration. Polarity of signal defined by configuration. be pulled up to AuxDC or not depending on Quick Charge NOT USED 8 Output Current 1 A nalog Scaled analog representation of UPS output current #1. Scaling 0.4VDC per amp AC out. 7 Tamper Status Discrete (Out) Indicates state of enclosure tamper switch. Open collector +5VDC. Polarity of signal defined by configuration. transistor, can be pulled up to AuxDC or limited to 6 Equipment Fail Alarm Discrete (Out) Indicates power supply Equipment Failure Open collector transistor, can depending on configuration. Polarity of signal defined by configuration. be pulled up to AuxDC or not 5 Battery Voltage Analog Scaled analog representation or 0.5VDC per volt battery. of UPS battery voltage. Scaling set by configuration. Can be: 0.1VDC, 0.3VDC, 4 AC Output Voltage Analog Scaled analog representation or 0.15VDC per volt AC out. of UPS output voltage. Scaling set by Configuration. Can be: 0.5VAC, 0.25VDC 3 Standby/ Line Fail Alarm Discrete (Out) Indicates state of UPS inverter. Open collector transistor, can configuration. Polarity of signal defined by configuration. be pulled up to AuxDC or not depending on 2 Auxiliary DC Out Power Auxiliary output power for transponder. Fused at 100mA. Voltage selected by JP1: +5VDC, +15VDC, +24VDC 1 Ground G round Ground reference for all signal and power (same as J5 pin 2, J3 pin 12). # CUT HERE IMPORTANT NOTE: In order for the USM2 to function correctly, OUTPUT (N) must be grounded to the XM2 Series 2 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 B0-003 Rev.D

30 7. REFERENCE 7.2 Testing and Troubleshooting, Quick Reference USM2 Start up and Test Procedure The XM2 power supply should be fully tested before attempting any USM2 operations. Refer to the XM2 technical manual for details. Once the power supply has been verified as GOOD the USM2 can then be tested as follows: 1. Verify the USM2 installation by checking: Configurations settings of switches and jumpers on the USM2. USM is properly installed onto Communication Module, and that the Communication Module is correctly installed into the XM2 power supply. Tamper switch is properly installed and connected. Data cable from the USM2 to the transponder is correctly installed. # CUT HERE 2. Unplug transponder s data cable from the USM2. 3. Using a true RMS multimeter, verify the USM2 s analog data (set by configuration) on the J3 connector by checking (ground on J3-1): Auxiliary DC output on J3-2 AC Output Voltage Level on J3-4 Battery Level output on J3-5 Output Current #1 level on J3-8 Output Current #2 level on J Using a true RMS multimeter, verify the USM2 s Digital data (set by configuration) on the J3 connector by checking (ground on J3-1): Standby Status Alarm J3-3, active any time inverter in ON. Equipment Fail Alarm J3-6, active if test failure or low battery condition. Tamper Alarm J3-7, active when the enclosure s door is open. Output Alarm J3-10, active when the XM2 s AC output has failed. 5. Verify remote USM2 control on the J2 connector by shorting to ground (J3-1): Test/Reset J3-11, shorted XM2 inverter Test ON, open inverter Test OFF. NOTE: Passing test steps 1-5 is a very good indication that the USM2 is operating correctly, if any of the tests fail; retest, verify failure, replace USM2 as needed. 6. Plug transponder s data cable back into the USM2. Repeat test steps 3-5; local results should remain the same. If results do NOT remain the same, this is an indication of a possible transponder failure. 7. Review analog data at status monitoring center, reported data should be similar to measured data (step 6). 8. Initiate an inverter test command from the status monitoring center, the power supply should go into test as commanded. Monitor command signals from the transponder on the USM connector J2 using a multimeter by checking: Test/Reset J3-11, active XM2 inverter ON, inactive inverter OFF. NOTE: Test steps 6-8 are used to verify the transponder and the status monitoring system, if any of the tests fail; retest, verify failure, troubleshoot status monitoring system (less USM2) as needed B0-003 Rev.D # CUT HERE