Guardian Technologies 4389 Section, Part, Description And Components, Circuit Board, J1 PIN, Wire

DC CONTROL

PART 4

SECTION 4.1

DESCRIPTION AND COMPONENTS

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.

Figure 3. Circuit Board

Page 4.1-2