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DC CONTROL
J1 PIN
WIRE
CIRCUIT FUNCTION
1
4
Field boost current to rotor (about 9-10 volts DC).
2
86
Low oil pressure shutdown. Automatic shutdown occurs when Wire 85 is grounded by loss of oil
pressure to the LOP.
3
23
Switched to ground for Transfer Relay (TR) operation.
4
194
12 VDC output from the circuit board for transfer relay, present in AUTO or MANUAL operation.
5
56
Energized (12 volts DC) by circuit board's crank relay (K1) to crank the engine.
6
18
Engine shutdown. Circuit is grounded by circuit board action to ground the engine
7
14
12 VDC output for engine run condition. Used for fuel solenoid (FS), battery charge relay (BCR),
and hourmeter if equipped.
8
66A
AC input to the board for crank terminate and overspeed protection.
9
239
B+ input when SW1 is in the MANUAL position.
10
15A
B+ input into the board for source voltage when SW1 is in the AUTO or MANUAL position.
11
17
B+ output to SW1 for manual start operation.
12
15
12VDC source voltage for the circuit board. Also runs timer for exerciser.
13
0
Common ground.
14
225
Transformer reduced "Utility" source sensing voltage.
15
224
Transformer reduced "Utility" source sensing voltage.
16
NOT USED
17
NOT USED
J2 PIN
WIRE
CIRCUIT FUNCTION
1
NOT USED
2
85
High temperature oil engine safety.
3
351
Input set exercise. Signal to ground to set.
4
15B
Output for remote alarm relay, optional.
5
229
Output for remote alarm relay, optional.
PART 4
Figure 3. Circuit Board
DESCRIPTION AND COMPONENTS
SECTION 4.1
Page 4.1-2
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