Ups Communication Signals; Table 11. Ups Communication Signal Descriptions - ADTRAN Total Access 362R Installation And Maintenance Manual

Total Access 362R Single Family Unit with RF Return Installation and Maintenance Guide

UPS Communication Signals

The communication signals of the UPS are isolated from the internal circuitry via open
collector opto‐coupled transistors. The connection
return point for all communication signals. In the typical application, the attached equipment
digital ground connects to Signal Return, and pull‐up resistors turn the open collector signals
into logic levels.
A pinout of the communication signals is shown in Table 11.
Signal
+12 VDC
12 V RTN
SIGNAL RETURN
ON BATTERY
REPLACE BATTERY
BATTERY MISSING
LOW BATTERY
48

Table 11. UPS Communication Signal Descriptions

Description
Vo+ (+ Voltage output)
Return path for +12 VDC
Signal return
Low when operating from utility line
Open when operating from battery
Low when battery is charged
Open when battery fails self‐test
Low when battery is present
Open when battery is missing
Low when battery is near full charge capacity
Open when operating from a battery with less than 20% capacity
SIG RTN
(Signal Return) is a common
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