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CHAPTER 4
CHAPTER 4
COMMUNICATIONS INTERFACES
RS-232 INTERFACE
21
Pin # Function explanation I/O
9 RS 232 Rx INPUT
6 RS 232 Tx OUTPUT
7 Ground
Location:
The RS-232 interface is standard on all SG series UPS models. The port is
located on the UPS rear panel, via a DB-9 female connector.
Supported Protocols
UPSILON 2000 & SEC SmartMon
BAUD RATE ------- 2400bps
DATA LENGTH---- 8 bits
STOP BIT----------- 1 bit
PARITY-------------- None
DB-9 Connector Pin Assignment
When making a connection between a computer and the UPS RS-232 port,
always use the green cable supplied with the UPS.
There are communications options that WILL DISABLE the RS-232 port and
render it inoperable. The options are as follows:
a. Internal SNMP/HTTP agent option installed into the UPS
communications option slot.
The following options WILL NOT affect the operation of the RS-232 port:
a. Falcon Opto Coupler based signal interface board installed in the
communications option slot.
b. Any Falcon relay-based, dry contact signal interface board
installed in the communications option slot.
DB-9 Signals are not isolated and intended for connection to like RS-232
interfaces. DO NOT APPLY ANY OTHER VOLTAGES TO THESE PINS!
6
7
8
9
1
2
3
4
5
TX
RX
GEN
CAUTION
CAUTION
CAUTION
GND