Sel 421 - Figure 2.19 Major Component Locations on the SEL-421 Main Board a (or B)

U.2.19
Date Code 20090715 User’s Guide SEL-421 Relay
Installation
Jumpers
Figure 2.19 Major Component Locations on the SEL-421 Main Board A (or B)
PORT 1PORT 2PORT 3
Control Inputs Control Outputs Control Outputs Control Outputs
J20
J22
PORT F
J17
J18
J16
JMP1 JMP2 JMP3
80-Pin PORT 5 Connector
Battery
J19
IRIG-B
A
B
C
D
Rear of Relay
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