Powerware 9315 UPS User Manual

Page 51

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Communication

7−5

EATON Powerware

®

9315 UPS (200–300 kVA) Operation Manual

S 164201036 Rev G www.powerware.com

Table 7-2.

Pin Assignments for Port 2 (DB-25)

Pin Number

Symbol

Function

Comments

1

GND

Chassis Ground

2

TXD

Transmit Data

Input to UPS

3

RXD

Receive Data

Output from UPS

4

RTS

Request to Send

Input to UPS

5

CTS

Clear to Send

Output from UPS

6

DSR

Data Set Ready

Output from UPS

7

RTN

Return

8

+12V

+12 Volts

Output from UPS - always true

20

DTR

Data Terminal Ready

Input to UPS - typically not used by UPS

22

–12V

–12 Volts

Output from UPS - always true

NOTE

Pins 5 and 6 are tied together internally.