connector wiring scheme
9 pin D-SUB male connector at
the UPS
|
Pin# |
Signal Type |
Function |
|
1 |
RS-232 Earth Ground |
Signal Common for all RS-232 port signals (earth ground referenced) |
|
2 |
RS-232 Transmit Output |
Serial communication mode - output signal line. |
|
3 |
RS-232 Receive Input / Shutdown |
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). |