02/02
56
GND
1
TD
2
RD
3
RTS
4
CTS
5
DSR
6
GND
7
DCD
8
DTR
20
RI
22
1
2
3
4
5
6
7
8
20
22
D25 m
D25 f
Modem
UPS X4
wiring details for connections
of UPS to Modem via DB25
socket
GND
1
TD
2
RD
3
RTS
4
CTS
5
DSR
6
GND
7
DTR
20
1
2 TD
3 RD
4 RTS
5 CTS
6 DSR
7 GND
8 DTR
D25 m
D25 f
Modem
UPS X4
wiring details for connections
of UPS to Personal
Computer via DB25 socket
GND
1
TD
2
RD
3
RTS
4
CTS
5
DSR
6
GND
7
DTR
20
2 RD
3 TD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
D25 m
D9 m
PC RS-232
UPS X4
wiring details for connections
of UPS to Personal
Computer via DB9 socket
Figure 4-12: RS232 connections to PC or Modem
7400M - Series UPS User Manual
Single Module and 1+N Parallel System