CHAPTER 5

COMMUNICATIONS INTERFACES

RS-232 INTERFACE

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

1

 

TX

2

6

GND

3

7

GEN

4

8

RX

5

9

 

DB-9 Connector Pin Assignment

Pin #

Function explanation

I/O

9

RS 232 Rx

INPUT

6

RS 232 Tx

OUTPUT

7

Ground

 

CAUTION

When making a connection between a computer and the UPS RS-232 port, always use the green cable supplied with the UPS.

CAUTION

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 to the communications option slot.

b.Any Falcon relay based, dry contact signal interface board installed into the communications option slot.

CAUTION

DB-9 Signals are not isolated and intended for connection to like RS-232 interfaces. DO NOT APPLY ANY OTHER VOLTAGES TO THESE PINS!

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