Murphy Series A900 manual 3.2 A902 wiring

Figure 4-2.3.2: A902 wiring

Hourmeter Voltmeter

Input

Barrier

Terminal

Blocks

Remove jumper from 4 and 27 to use manual start switch

	AUTO START
		MODULE
15	B+ OUT		ALARM SILENCE	35
26	HOURMETER		AUDIBLE ALARM	36
4	B-		OVERCRANK	37
27	MANUAL START		OVERSPEED	38
28	START		OIL PRESSURE	39
4	PICKUP		HI WATER TEMP.	40
29	PICKUP	REMOTE SHUTDOWN		41
30	OIL PRESSURE		SPARE SHUTDOWN	42
31	LO WATER TEMP.		LOSS OF SPEED	43
32	HI WATER TEMP.		LO WATER TEMP.	44
33	REMOTE S.D.		*SPARE ALARM	45
34	SPARE ALARM			46

LEVEL 2 ALARM

*Air damper closed on a 2-cycle engine

Output

Barrier

Terminal

Blocks

B+

Optional

Battery	NOTE 2
	Auxiliary Starter
	Solenoid

LOW WATER LEVEL REMOTE VISUAL REMOTE AUDIBLE LOCAL AUDIBLE N.C. N.C. OVERSPEED RELAY SHUTDOWN RELAY FUEL RELAY CRANK RELAY AUX. CRANK DISCONNECT N.C. CONTROL ON SYSTEM READY FUSED B+ B-

Alternator

NOTE 1

NOTE 2

Starter

NOTE 2

NOTE 2

NOTE 2

8A

Circuit

Breaker

Energize to Stop solenoid

Energize to Run solenoid

Alternator Excitor

Breaker Shunt trip coil

Fuel Pressure Switch

Spare shutdown

			Red	Blk
	J1 A B C D E F G H I J K L M N J2 + -
			D9
1A	MDQ3	100K		15
	3A Fuse
4				4
5			Local	16
6	Fuel			17
			Audible
	Relay
7		I	Alarm	18
			D
8			J1G	19
9	Shut		Remote	20
	Down		Audible
10	Relay	H	Alarm	21
			C
11				22

B+
B-	Auxiliary crank
	disconnect
	relay
	Crank relay

Optional Run relay and Remote signal

Local audible alarm

Power supply

Remote audible alarm

Air Damper

Solenoid

To Battery +

To Battery +

Control on sink 200 mA MAX

System ready sink 200 mA MAX

Ç ontrol on source 200 mA MAX

12		Over	Remote	23
13		Speed	Visual	24
	Q2	Relay	Alarm
14		G	B	25
	D8	Q3

Power supply

Remote visual alarm Power supply

NOTE 1: Fuel Pressure Switch and Air Damper Solenoid are used on a 2-cycle engine

NOTE 2: Place Reverse Bias Diodes across inductive loads.

Q1

Drawing Revision C

17