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Pin
number
Function
description
I/O
3 Rx input
2 Tx output
5 Ground GND
DB-9 pin assignment:
Optional AS400 interface
This optional AS400 card provides dry contact closure signal
“OPEN” or “CLOSE”. Following are the pin assignment and the
descriptions of AS400 card:
PIN1: UPS failure (normally open, active close)
PIN2: summary alarm
PIN3: ground
PIN4: Remote shutdown
PIN5: Common
PIN6: Bypass active (relay close)
PIN7: Battery low
PIN8: UPS On (relay close)
PIN9: Utility Power failure (normally open, active close)
RS232 Interface
AS400 Interface