Powerware Powerware 9315 ‐2. Port 2 DB‐25, ‐2. Pin Assignments for Port 2 DB‐25, Pin Number

COMMUNICATION

GND

RS‐232 TXD

RS‐232 RXD

RS‐232 RTS

RS‐232 CTS

RS‐232 DSR

RTN

+12V

NOT USED

NOT USED

NOT USED

NOT USED

NOT USED

1		NOT USED
	14
2
	15	NOT USED
3
		NOT USED
	16

4NOT USED

17

5 18 NOT USED

6NOT USED

19

7RS‐232 DTR

20

8NOT USED

21

9–12V

22

10NOT USED

23

11NOT USED

24

12 NOT USED

25

13

Figure 12‐2. Port 2 (DB‐25)

Table 12‐2. 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.

12-2 EATON Powerware® 9315 UPS (500–750 kVA) Installation and Operation Manual S 164201244 Rev E www.powerware.com