6. COMMUNICATION INTERFACE:
The UPS provides both computer interfaces, smart software (RS-232) and dry
contact (DB-9); by using different software and cable, the UPS shows different
monitoring function.
6.1 The definition and setup for RS-232 is as following:
Baud Rate : 2400 dps
Data Length : 8 bits
Stop Bit : 1 bit
Parity : None
Pin #6 : RS-232 data Tx out.
Pin #7 : Common of Pin #6 and Pin #9
Pin #9 : RS-232 data Rx In
6.2 The definition and setup for DB9 (optional) is as following:
Pin #2 : AC Power Failure
Pin #4 : Common GND of Pin #2 & Pin #5
Pin #5 : UPS Battery Low
Pin #6 : Turn off UPS
Pin #7 : GND of Pin6
The interface with computer is diagramed as above for your reference. Use Pin #4 as the
common of Pin #2 and Pin #5, Pin #2 and Pin #4 will become close loop from open when
the utility fails, Pin #5 and Pin #4 will become close loop from open when the battery level
is low.
The UPS will shut down itself when the high level signal from RS-232, sustained for
3 seconds, is applied between Pin #6 and Pin #7.
5 4 3 2 1
9 8 7 6
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