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Serial communication mode - input signal line. Contact Closure mode - shuts down UPS if signal is held high (RS-232 level) for 200 milliseconds while UPS is operating in battery mode.
4
AC Line Fail (normally closed)
Contact Closure mode - opened when AC line fails and UPS is operating in battery mode (breaks connection between Pin#4 and Pin#5).
5
Contact Closure Common / RS-232 Common
Signal Common for all Contact Closure group / RS-232 Signal Common line.
7
Low Battery (normally open)
Contact Closure mode - closed when remaining "on-battery runtime" drops below the under-defined time limit (makes connection between Pin#7 and Pin#5).
9
AC Line Fail (normally open)
Contact Closure mode - closed when in battery mode (makes connection between Pin#9 and Pin#5).
3.8.2 HP PowerWise L600/L900/L1250 cable
Hewlett-Packard Part# - 201-471-09 , Software - HP PowerWise Assistant
3.9 Optiquest/Viewsonic
3.9.1 OptiUPS-650E/420E Cable
Optiquest Part# 730-02024-00 , Software - OPTI-SAFE+
3.10 Liebert
3.10.1 UPStation-GXT interface pinout
| Pin# | Function |
| 1 |
Low Battery (Optocoupler Collector: +V) |
| 2 |
UPS TxD |
| 3 |
UPS RxD |
| 4 |
Remote ShutDown (+5..12VDC, 10 mA max); on battery operation |
| 5 |
Common |
| 6 |
Remote ShutDown (Short to pin 5); any mode operation |
| 7 |
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