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Communication Port Configuration Table
Pin Signal Type Function
1 Input (0.2 second RS-232 Remote Power Off: In absence of normal AC Input,
level high pulse) output power is kept OFF until normal AC returns.
Unit turns off after delay set by the dip switches.
2 Output (RS-232 level high) AC Input Failure: Indicates absence of normal
AC Input.
3 Output (simulated contact AC Input Failure: Indicates absence of normal Input.
closing with pin 4)
4 Common Signal Common: Common signal for pins 1, 2, 3, 5,
6, 7, and 8.
5 Output (simulated contact Impending Low Battery: Indicates that the battery has
internal closing with pin 4) less than 2 or 5 minutes of backup time left.
6 Output (simulated contact AC Input Failure: Indicates absence of normal
opening with pin 4) Input.
7 Input (common or RS-232 Remote Output OFF, ON: UPS output can be turned
low, open, or RS-232 high) OFF by maintaining low or common. UPS output
output returns when pin is high or open if normal AC
Input is present. UPS ON/OFF Switch must be ON.
8 Output (+24VDC +24VDC: Short circuit protected. +24VDC is present
unregulated) whenever the UPS is ON.
9 Chassis Ground Chassis Ground
Signal Ratings:
open circuit voltage: +40VDC
short circuit current: 50mA
Shielded I/O Cables must be used when making
connections to the Communication Port.
Chapter 3. Operation 26
NOTE