Eaton Electrical Powerware 9315 operation manual Pin Assignments for Port 2 DB-25

Communication

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.

EATON Powerware® 9315 UPS (200–300 kVA) Operation Manual S 164201036 Rev F powerware.com 7-5