Alpha Technologies USM2.5 Status Monitor - Manual (Page 7)

1. Introduction
7 704-683-B0-004, Rev. D
1.1 USM2.5 Introduction
This Operator’s and Technical Manual will cover the installation, signal definition, operation,
and basic troubleshooting for the USM2.5 when used with the Alpha XM Series 2 Power
Supply.
The USM2.5 card is a logic controller PCB which may be used to upgrade any XM Series 2
Power Supply for the purpose of remote status monitoring. As part of the Communications
Module upgrade, the USM2.5 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 USM2.5 remote status monitoring system is comprised of the following basic building
blocks:
• An Alpha XM Series 2 Uninterruptible Power Supply.
• An approved transponder.
• The USM2.5 status monitoring card.
Operating through a transponder and status monitoring system, the operator may issue
commands to the USM2.5 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 uninterrupted performance of each power supply. More importantly, proper USM2.5
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 USM2.5
Figure 1-1,
Old Version of USM2.5
Figure 1-2,
New Version of USM2.5