Murphy A900 Series manual 3.3 A903 wiring

Page 21

 

 

 

Figure 4-2.3.3: A903 wiring

 

Hourmeter

Voltmeter

Input

 

 

 

 

 

 

 

 

 

 

 

 

Barrier

 

 

 

 

 

 

Terminal

AUTO START

 

 

 

Blocks

 

 

 

15

B+ OUT

MODULE

ALARM SILENCE

35

 

 

 

 

 

26

HOURMETER

 

AUDIBLE ALARM

36

Remove jumper from

4

B-

 

OVERCRANK

37

4 and 27 to use

 

27

MANUAL START

 

OVERSPEED

38

manual start switch

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

SWITCH NOT IN AUTO

46

 

 

47

 

SPARE

 

53

 

 

48

 

SPARE

 

54

 

 

49

 

SPARE

 

55

 

 

50

 

SPARE

 

56

 

 

51

 

SPARE

 

57

 

 

52

 

SPARE

 

58

 

 

 

LEVEL 2 ALARM

 

Output

Barrier

Terminal

Blocks

B+

*Air damper closed

on a 2-cycle engine

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

18

Image 21
Contents A900-9025N Revised Section Before Beginning Installation of this Murphy Product Table of Contents Power Requirements How to use this manualField Wiring Connections Operating Temperature165 mm A901NFPA99 CAN/CSA Counts the number of cranking attempts A901-2 159 mm A902 A902-2 Provides a signal to the overspeed shutdown circuit if A903 1.2Lamp Test Pushbutton Tests the lights on the A903 module A903-2 Page Location Wiring2.5 Mounting Dimensions 3.1 A901 wiring 3.2 A902 wiring 3.3 A903 wiring Pre-operational Check-out Crank DisconnectFuel Relay Operator Controls Routine MaintenanceOperating Modes Operational Tests13.8 27.6 Circuit Input Output A900 Selectronic Control Alarm Circuit OperationService Parts FWMurphy