2.14
SEL-351S Relay Instruction Manual Date Code 20080103
Installation
Making Rear-Panel Connections
Making Rear-Panel Connections
Refer to Figure 2.17–Figure 2.31 for wiring examples of typical applications.
Refer to Table 2.1 and Figure 2.2–Figure 2.6. Notice the two types of rear-
panel hardware connections. Reference is made to the model numbers in
discussing rear-panel connection differences in the following text.
Required Equipment/
General Connection
Information
Models 0351SxY (Plug-In Connectors)
Tools: Small slotted-tip screwdriver, wire strippers.
Parts: SEL-WA0351 Wiring Harness for 0351SxYx3/4 models.
SEL-WA0351S Wiring Harness for 0351SxYx5/6/A/B models
Wiring Harness
The wiring harness includes all connectors necessary for relay installation. All
connectors requiring special termination come prewired from the factory.
The SEL-WA0351 Wiring Harness includes the following connectors (not
prewired):
➤ (2) 8-position female plug-in connectors for output contacts
OUT101–ALARM.
➤ (2) 6-position female plug-in connectors for optoisolated inputs
IN101–IN106.
➤ (1) 8-position female plug-in connectors for EIA-485/IRIG-B
Serial Port 1.
➤ (4) 6-position female plug-in connectors for output contacts
OUT201–OUT212.
➤ (2) 8-position female plug-in connectors for optoisolated inputs
IN201–IN208.
These connectors accept wire size AWG 24 to 12. Strip the wires 0.31 inches
(8 mm) and install with a small slotted-tip screwdriver. Secure each 8-position
connector to the relay chassis with the screws located on either end of the
connector. The 8-position connectors are coded at the factory to prevent
swapping connectors during installation. Refer to Figure 2.12 for the standard
input/output connector coding.
The wiring harness includes the following prewired connectors:
➤ (1) CT shorting connector for current inputs IA, IB, IC, and IN.
➤ (1) connector for voltage inputs VA, VB, VC, and VS.
➤ (1) connector for POWER inputs (+ and –).
➤ (1) spade connector for GROUND connection (chassis ground).
➤ (2) connectors for auxiliary {TRIP} and {CLOSE} pushbuttons and
LEDs (for 0351SxYx5/6/A/B models Only)
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