Sel 421 - Figure 2.21 Major Component Locations on the SEL-421 INT1 (or INT2) I;O Board

U.2.23
Date Code 20090715 User’s Guide SEL-421 Relay
Installation
Jumpers
Figure 2.21 Major Component Locations on the SEL-421 INT1 (or INT2) I/O
Board
JMP2A
JMP2B
JMP1A
J8
Control Inputs Standard Control Outputs Standard Control Outputs
JMP1B
Rear of Relay
Courtesy of NationalSwitchgear.com