TM 5-3810-307-24-1-2
10. DRAWING 7. CONNECTION BOARD IN CENTRAL UNIT
VOLTMETER SHOULD MEASURE +24 VOLTS BETWEEN CONNECTIONS:
INPUT X1:1 (POSITIVE) & X1:3 (GROUND)
OUTPUT X4:1 (POSITIVE) & X4:3 (GROUND)
REFER TO DRAWING 2 FOR WIRING DIAGRAM.
REFER TO DRAWING 3 FOR BOARD LOCATION.