10
PCM500 SERIES
OPERATING MANUAL
Outputs on terminals 13-36 are Form C relay contact alarms for the functions
given. “Normally Closed” (NC) means a “short” between this terminal and the
Common (C) terminal when the function is operating properly with power
applied. “Normally Open” (NO) means an “open” between this terminal and
the Common (C) terminal when the function is operating properly with power
applied.
13.3
Abbreviations/Acronyms. These are used in the previous tables and are
defined in the following table.
13.4
Explanation of Other I/O Connections. Most of the connections to TB1 are
alarm inputs and outputs. The “Other I/O” connections are various analog
type connections.
13.41 I+ and I- Input. These are the + and - connections from a meter shunt
that is used to measure battery current. See Section 15.3 on
“Current” for further details.
13.42 TC Input. This is the optional temperature compensation input from
the temperature compensation probe that comes with this option. The
probe is used to measure battery temperature which is used to control
the output of the rectifier. See Section 16.0 on “Battery Temperature
Compensation”. There is no polarity reference on this.
13.43 B+ and B- Input. These connections are to the common rectifier
output bus which is used to provide power to operate the PCM500
ACRONYM
DESCRIPTION
LVDA
Low Voltage Disconnect Alarm
FA
Fuse/Circuit Breaker Alarm
I+, I-
Meter Shunt
TC
Temperature Compensation (from probe)
B+, B-
Battery (from rectifier bus)
CS
Current Share (to rectifier shelves)
EQA
Equalize Alarm
OVA
Battery Overvoltage Alarm
RFA-MIN
Rectifier Failure Alarm - Minor (single rectifier failure)
ACFA
AC Failure Alarm
RFA-MAJ
Rectifier Failure Alarm - Major (two or more
rectifier failures)
UVA
Battery Undervoltage Alarm
RA
Remote Adjust (to rectifier shelves)
BS+, BS-
Battery Sense
