Date Code 20010731 Serial Port Communications and Commands 8-3
SEL-352-1, -2 Instruction Manual
Table 8.2: SEL-352 Relay Communications Cable Numbers
SEL-352 Port # Connect to Device
(gender refers to device)
SEL Cable #
2, 3, 4 PC, 25-Pin Male (DTE) C227A
2, 3, 4 Laptop PC, 9-Pin Male (DTE) C234A
2, 3 SEL-2020 or SEL-2030 without IRIG-B C272A
2 SEL-2020 or SEL-2030 with IRIG-B C273A
2 SEL-IDM, Ports 2 through 11 Requires a C254 and C257 cable.
2, 3 Modem, 5 Vdc Powered (Pin 10) C220*
2, 3 Standard Modem, 25-Pin Female (DCE) C222
* The 5 Vdc serial port jumper must be installed to power the modem using C220. See Serial
Port Jumpers in Section 2: Installation.
For example, to connect the SEL-352 Relay Port 2, 3, or 4 to the 9-pin male connector on a
laptop, order cable number C234A, and specify the length needed. To connect the SEL-352
Relay Port 2 to the SEL-2020/SEL-2030 Communications Processor that supplies the
communications link and the time synchronization signal, order cable number C273A, and
specify the length needed. For connecting devices at over 100 feet, fiber-optic transceivers are
available. The SEL-2800 and SEL-2810 provide fiber-optic links between devices for electrical
isolation and long distance signal transmission. Call the factory for further information on these
products.
The following cable diagrams show several types of EIA-232 serial communications cables.
These and other cables are available from SEL. Contact the factory for more information.
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