Schweitzer Engineering Laboratories SEL-351A - Page 413

10.3
Date Code 20080213 Instruction Manual SEL-351A Relay
Serial Port Communications and Commands
Port Connector and Communications Cables
The following cable diagrams show several types of EIA-232 serial
communications cables that connect the SEL-351A to other devices. These
and other cables are available from SEL. Contact the factory for more
information.
SEL-351A to
Computer
SEL-351A to Modem
SEL-351A Relay
9-Pin Male
"D" Subconnector
9-Pin Female
"D" Subconnector
2
3
5
8
3
2
5
8
7
1
4
6
RXD
TXD
GND
CTS
TXD
RXD
GND
CTS
RTS
DCD
DTR
DSR
Pin
Func.
Pin
Func.
Pin # Pin #
Cable SEL-C234A
*DTE Device
*DTE = Data Terminal Equipment (Computer, Terminal, Printer, etc.)
SEL-351A Relay
9-Pin Male
"D" Subconnector
25-Pin Female
"D" Subconnector
5
3
2
9
8
7
3
2
1
4
5
6
8
20
GND
TXD
RXD
GND
CTS
GND
RXD
TXD
GND
RTS
CTS
DSR
DCD
DTR
Pin
Func.
Pin
Func.
Pin # Pin #
Cable SEL-C227A
*DTE Device
*DTE = Data Terminal Equipment (Computer, Terminal, Printer, etc.)
SEL-351A Relay
9-Pin Male
"D" Subconnector
25-Pin Female
"D" Subconnector
5
3
7
2
8
9
7
2
20
3
8
1
GND
TXD
RTS
RXD
CTS
GND
GND
TXD (IN)
DTR (IN)
RXD (OUT)
CD (OUT)
GND
Pin
Func.
Pin
Func.
Pin # Pin #
Cable SEL-C222
**DCE Device
**DCE = Data Communications Equipment (Modem, etc.)
Courtesy of NationalSwitchgear.com