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Troubleshooting and Diagnostics
4
34937A 32-Channel GP Switch
The 34937A general- purpose switch module provides independent 
control of:
• Twenty- eight Form C (DPST) latching relays rated at 1 A
• Four Form A (SPST) latching relays rated at 5 A.
A simplified schematic is shown below.
For the 34937A, relay part numbers are given on page 130 and the
component locator is shown on page 145. The table below shows the
relationship of channel numbers to relay numbers.
Bank 1
Channel
001
002
003
004
005
006
007
008
009
010
011
012
013
Bank 2
Relay
K601
K602
K603
K604
K605
K606
K607
K608
K609
K610
K611
K612
K613
Channel
015
016
017
018
019
020
021
022
023
024
024
026
027
Form A
029
030
34980A Service Guide
Relay
K615
K616
K617
K618
K619
K620
K621
K622
K623
K624
K625
K626
K627
Form A
K629
K630
031
032
K631
K632
111