701 Motor Protection Relay Date Code 20010719
ASCII Serial Port Operation
You Will Need…
6.2
You Will Need…
To connect a PC serial port to the relay front-panel serial port and enter relay
commands, you will need the following:
Personal computer equipped with one available EIA-232 serial port.
Communication cable to connect the computer serial port to the relay
serial port.
Terminal emulation software to control the computer serial port.
SEL-701 Relay.
On most newer computers, the connector for the EIA-232 serial port is a 9-pin
D-sub connector. You can purchase the cable to connect the computer port to the relay
port from SEL (part number C234A), you can use a null-modem cable, or you can
build your own cable using the pinouts shown in Figure 6.1 on page 6.3.
You can use a variety of terminal emulation programs on your personal computer
to communicate with the SEL-701 Relay. Examples of PC-based terminal emulation
programs include:
ProComm Plus™.
Relay Gold™.
Microsoft Windows HyperTerminal™.
Smartcom™.
Crosstalk™.
The SEL-701PC software also includes a terminal emulation function. If you use
this package, no additional software is necessary.
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