Power Supply User Manual

CHAPTER

COMMUNICATIONS INTERFACES

RS-232 INTERFACE

Pin #

Function explanation

I/O

RS 232 Rx

INPUT

RS 232 Tx

OUTPUT

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 Smart Mon

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 due to the propriatary pin-

out of the RS-232 port.

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 to 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!

GEN

CAUTION

GND