ECM 2 CM850
SOURCE ADDRESS
(00) 60 - PIN
CONNECTOR
NOTE 1 : SOME OF THE CIRCUITS SHOWN HERE WILL NOT BE ACTIVE IN ALL
RED
DC VOLTAGE
BLUE
INPUT SIGNALS
APPLICATIONS. CONSULT THE EQUIPMENT MANUFACTURER'S
BLACK
GROUNDS, SHIELDS AND RETURNS
LITERATURE TO DETERMINE WHICH CIRCUITS ARE USED.
PURPLE
OUTPUT SIGNALS
GREEN
DATA LINKS
NOTE 2 : ALL WIRES ARE 18 AWG UNLESS OTHERWISE NOTED.
REPRESENTS FEMALE PIN
NOTE 3 : SUPPLIER MAY USE LARGE WIRE SIZE TO FACIUTATE CONTACT SIZW.
GENERATOR SPEED / LOAD GOVERNING BIAS SIGNAL
GENERATOR SPEED / LOAD GOVERNING BIAS SIGNAL
DROOP ADJUST POTENTIOMETER SIGNAL
DROOP ADJUST POTENTIOMETER SIGNAL
19
29
REPRESENTS MALE PIN
GENERATOR OUTPUT FREQUENCY ADJUST POTENTIOMETER SIGNAL
REPRESENTS TWISTED PAIR
OEM RESPONSIBILITY
CUMMINS RESPONSIBILITY
A
SAE J1939
DATA LINK
TERMINATOR
(120 OHM)
REPRESENTS SHIELD
B
C
GENERATOR OUTPUT FREQUENCY ADJUST POTENTIOMETER SIGNAL
SAE J1939 DATA LINK SUPPLY
SAE J1939 DATA LINK SUPPLY
SAE J1939 DATA LINK RETURN
SAE J1939 DATA LINK RETURN
SAE J1939 DATA LINK SHIELD
SAE J1939 DATA LINK SHIELD
CEN DATA LINK 2 ENGINE NETWORK
B
GENERATOR SPEED / LOAD GOVERNING BIAS SIGNAL
LOAD SHARE
EQUIPMENT
GENERATOR SPEED / LOAD GOVERNING BIAS RETURN (SENSOR RETURN 1)
07
GENERATOR SPEED / LOAD GOVERNING BIAS 5 VOLT
SUPPLY (SENSOR SUPPLY 1)
08
GENERATOR SPEED / LOAD GOVERNING BIAS SHIELD
GENERATOR SPEED / LOAD GOVERNING BIAS RETURN
(SENSOR RETURN 1)
SENSOR RETURN 1
GENERATOR SPEED / LOAD GOVERNING BIAS 5 VOLT
SUPPLY (SENSOR SUPPLY 1)
SENSOR SUPPLY 1
BAROMETRIC
PRESSURE SENSOR
2
32
3
21
1
INTAKE MAINFOLD 1
PRESSURE SENSOR
DROOP ADJUST POTENTIOMETER SIGNAL
21
2
3
DROOP ADJUST POTENTIOMETER SIGNAL
GAIN ADJUST POTENTIOMETER SIGNAL
GAIN ADJUST
POTENTIOMETER
13
GAIN ADJUST POTENTIOMETER RETURN (SENSOR RETURN 4)
GAIN ADJUST POTENTIOMETER SIGNAL
09
GAIN ADJUST POTENTIOMETER RETURN (SENSOR RETURN 4)
1
INTAKE MAINFOLD 2
PRESSURE SENSOR
SENSOR RETURN 4
22
GAIN ADJUST POTENTIOMETER 5 VOLT SUPPLY (SENSOR SUPPLY 4)
SUPPLY
CEN DATA LINK 2 ENGINE NETWORK
CEN DATA LINK 2 ENGINE NETWORK
SUPPLY
SHIELD
A
06
08
CEN DATA LINK 2
ENGINE NETWORK
TERMINATOR (120 OHM)
B
C
BAROMETRIC PRESSURE 5 VOLT SUPPLY (SENSOR SUPPLY 2)
BAROMETRIC PRESSURE RETURN (SENSOR RETURN 2)
BAROMETRIC PRESSURE SIGANL
BAROMETRIC PRESSURE SIGANL
03
INTAKE MAINFOLD 1 PRESSURE 5 VOLT SUPPLY (SENSOR SUPPLY 2)
INTAKE MAINFOLD 1 PRESSURE RETURN (SENSOR RETURN 2)
INTAKE MAINFOLD 1 PRESSURE SIGNAL
INTAKE MAINFOLD 1 PRESSURE SIGANL
44
2
3
23
INTAKE MAINFOLD 2 PRESSURE 5 VOLT SUPPLY (SENSOR SUPPLY 2)
SENSOR SUPPLY 2
INTAKE MAINFOLD 2 PRESSURE RETURN (SENSOR RETURN 2)
INTAKE MAINFOLD 2 PRESSURE SIGANL
INTAKE MAINFOLD 2 PRESSURE SIGANL
SENSOR TRTURN 2
4
GENERATOR OUTPUT FREQUENCY ADJUST POTENTIOMETER SIGNAL
SUPPLY
07
4
DROOP ADJUST POTENTIOMETER 5 VOLT SUPPLY (SENSOR SUPPLY 4)
DROOP ADJUST
POTENTIOMETER
SHIELD
CEN DATA LINK 2 ENGINE NETWORK
CEN DATA LINK 2 ENGINE NETWORK
1
CEN DATA LINK 2 ENGINE NETWORK
CEN DATA LINK 2 ENGINE NETWORK RETURN
CEN DATA LINK 2 ENGINE NETWORK
SHIELD
C
CEN DATA LINK 2 ENGINE NETWORK RETURN
CEN DATA LINK 2 ENGINE NETWORK RETURN
ECM 2 CM850 SOURCE
ADDRESS (00) 50 - PIN
CONNECTOR
02
SUPPLY
SAE J1939 DATA LINK
TERMINATOR (120 OHM)
B
SHIELD
CEN DATA LINK 2 ENGINE NETWORK RETURN
C
31 - PIN OEM
CONNECTOR
GENERATOR SPEED / LOAD GOVERNING BIAS SIGNAL
CEN DATA LINK 2 ENGINE NETWORK
A
CEN DATA LINK 2
ENGINE NETWORK
TERMINATOR (120 OHM)
A
12
37
18
47
GENERATOR OUTPUT FREQUENCY ADJUST POTENTIOMETER SIGNAL
12
GENERATOR OUTPUT
FREQUENCY ADJUST
POTENTIOMETER
GENERATOR OUTPUT FREQUENCY ADJUST
POTENTIOMETER 5 VOLT SUPPLY (SENSOR SUPPLY 4)
20
COOLANT PRESSURE 5 VOLT SUPPLY (SENSOR SUPPLY 1)
GENERATOR OUTPUT FREQUENCY ADJUST
POTENTIOMETER 5 VOLT SUPPLY (SENSOR SUPPLY 4)
SENSOR SUPPLY 4
1
22
2
COOLANT PRESSURE SENSOR
COOLANT PRESSURE RETURN (SENSOR RETURN 1)
COOLANT PRESSURE SIGANL
COOLANT PRESSURE SIGNAL
3
A
COOLANT LEVEL
SENSOR 1
B
COOLANT LEVEL 1 5 VOLT
SUPPLY (SENSOR SUPPLY 1)
4
COOLANT LEVEL 1 SIGNAL
1
ENGINE OIL RIFLE PRESSURE 1 5 VOLT SUPPLY (SENSOR SUPPLY 1)
COOLANT LEVEL 1 RETURN (SENSOR RETURN 1)
C
36
28
ENGINE OIL RIFLE
PRESSURE 1 SENSOR
(RIGHT SIDE OPTION)
ENGINE OIL RIFLE PRESSURE 1 RETURN (SENSOR RETURN 1)
SENSOR SUPPLY 1
2
3
ENGINE OIL RIFLE PRESSURE SIGNAL
ENGINE OIL RIFLE PRESSURE 1 SIGANL
33
13
4
RETURN
IDLE / RATED SWITCH SIGNAL
RETURN
26
DIAGNOSTIC TEST MODE SWITCH SIGNAL
RETURN
01
ALTERNATE FREQUENCY SWTCH SIGNAL
25
DIAGNOSTIC INCREMENT SWITCH SIGNAL
MOMENTARY
06
DIAGNOSTIC DECREMENT SWITCH SIGNAL
RETURN
10
ENGINE PROTECTION OVERRIDE SWITCH SIGNAL
03
IDLE / RATED SWITCH SIGNAL
18
DIAGNOSTIC TEST MODE SWITCH SIGNAL
16
ALTERNATE FREQUENCY SWTCH SIGNAL
04
DIAGNOSTIC INCREMENT SWITCH SIGNAL
B
25
ENGINE PROTECTION OVERRIDE SWITCH SIGNAL
15
ENGINE COOLANT TEMPERATURE 1 RETURN (SENSOR RETURN 1)
INTAKE MAINFOLD 1 TEMPERATURE SIGNAL
INTAKE MAINFOLD 1 TEMPERATURE SIGANL
A
INTAKE MAINFOLD 1
TEMPERATURE SENSOR
B
24
DIAGNOSTIC DECREMENT SWITCH SIGNAL
ENGINE COOLANT TEMPERATURE 1 SIGNAL
ENGINE COOLANT TEMPERATURE 1 SIGANL
A
ENGINE COOLANT
TEMPERATURE 1 SENSOR
A
INTAKE MAINFOLD 2
TEMPERATURE SENSOR
B
INTAKE MAINFOLD 2 TEMPERATURE SIGNAL
INTAKE MAINFOLD 2 TEMPERATURE SIGANL
FAULT ACKNOWLDGE SWITCH SIGNAL
27
15
FAULT ACKNOWLDGE SWITCH SIGNAL
06
A
ENGINE OIL
TEMPERATURE SENSOR
B
ENGINE OIL TEMPERATURE SIGNAL
TACHOMETER OUTPUT SIGNAL
31
SWITCH / METER RETURN
11
TACHOMETER OUTPUT SIGNAL
SWITCH / METER RETURN
SWITCH / METER RETURN
CONTROL MODULE IDENTIFICATION 3
34
1
RTC BATTERY BACKUP
2
RTC BATTERY BACKUP SUPPLY
RTC BATTERY BACKUP SUPPLY
RTC BATTERY BACKUP RETURN
RTC BATTERY BACKUP RETURN
COMMON WARNING LAMP (AMBER)
17
COMMON SHUTDOWN LAMP (RED)
16
OVERSPEED SHUTDOWN LAMP
SENSOR SUPPLY 3
12
ENGINE CRANKSHAFT SPEED SIGNAL
45
COMMON WARNING LAMP
COMMON SHUTDOWN LAMP
ENGINE OIL BURN VALVE SIGNAL
A
ENGINE OIL BURN VALVE RETURN
B
ENGINE OIL LEVEL REMOTE RESERVOIR SIGNAL
40
42
14
C
ENGINE CRANKSHAFT
SPEED SENSOR
B
A
29
30
ENGINE ID KEY 1
27
ENGINE CRANKSHAFT SPEED SIGNAL
ENGINE CRANKSHAFT SPEED SIGNAL
ENGINE CRANKSHAFT SPEED RETURN
ENGINE CRANKSHAFT SPEED RETURN
ENGINE CRANKSHAFT SPEED 5 VOLT SUPPLY (SENSOR SUPPLY 3)
ENGINE CRANKSHAFT SPEED 5 VOLT SUPPLY
17
18
08
03
ENGINE ID KEY 2
17
ENGINE ID KEY 3
02
C
ENGINE POSITION SENSOR
B
A
ENGINE POSITION SIGNAL
ENGINE POSITION SIGNAL
ENGINE POSITION RETURN
ENGINE POSITION RETURN
ENGINE POSITION 5 VOLT SUPPLY
ENGINE POSITION 5 VOLT SUPPLY
PRIMARY ID BIT
PRIMARY ID BIT
16 - PIN OEM
POWER
CONNECTOR
CEN DATA LINK ENGINE NETWORK
SUPPLY
CEN DATA LINK ENGINE NETWORK RETURN
GRID HEATER RELAY SUPPLY
R
48
ECM 1 CM552
SOURCE ADDRESS
(00) 50 - PIN
CONNECTOR
50
ENGINE OIL BURN VALVE
SOLENOID DRIVER
28
16
43
19
05
32
44
LOW OIL PRESSURE (LOP) SHUTDOWN LAMP
LOW OIL PRESSURE (LOP) SHUTDOWN LAMP (RED)
35
07
SENSOR RETURN 3
18
38
41
CONTROL MODULE IDENTIFICATION 2
OVERSPEED SHUTDOWN LAMP (RED)
50
ENGINE OIL TEMPERATURE RETURN (SENSOR RETURN 1)
SENSOR RETURN 1
RETURN
30
INTAKE MAINFOLD 2 TEMPERATURE RETURN (SENSOR RETURN 1)
ENGINE OIL TEMPERATURE SIGANL
RETURN
23
INTAKE MAINFOLD 1 TEMPERATURE RETURN (SENSOR RETURN 1)
49
GRID HEATER RELAY RETURN
CEN DATA LINK ENGINE NETWORK SHIELD
29
S
IGNITION ( EMERGENCY STOP ) INPUT
IGNITION
RUN / STOP SWITCH
SAE J1939 DATA LINK ENGINE NETWORK SHIELD
SAE J1939 DATA LINK ENGINE NETWORK RETURN
SAE J1939 DATA LINK ENGINE NETWORK SUPPLY
09
19
10
47
48
02
12
44
39
BATTERY 1 VOLTAGE SUPPLY
37
BATTERY 1 VOLTAGE SUPPLY
47
BATTERY 1 VOLTAGE SUPPLY
15 AMP FUSE
46
BATTERY 1 VOLTAGE SUPPLY
38
39
40
50
IGNITION
( EMERGENCY STOP )
NC
BATTERY 1 VOLTAGE RETURN
BATTERY 1 VOLTAGE RETURN
BATTERY 1 VOLTAGE RETURN
BATTERY 1 VOLTAGE
BATTERY 1 VOLTAGE RETURN
20
28
29
30
A
10 AMP FUSE
BATTERY 1 VOLTAGE (ECM 2)
F
2
B
FUEL SHUTOFF VALVE SUPPLY
FUEL SHUTOFF VALVE SUPPLY
RACK ACTUATOR RETURN
RACK ACTUATOR RETURN
RACK ACTUATOR RETURN
BATTERY DRIVER SUPPLY
10 AMP FUSE
BATTERY 1 VOLTAGE
FUEL SHUTOFF VALVE RETURN
01
J
B
1
FUEL SHUTOFF VALVE
(SERVICE PORT)
FUEL PUMP
C
TIMING ACTUATOR PWM SUPPLY
TIMING ACTUATOR PWM SUPPLY
D
TIMING ACTUATOR RETURN
TIMING ACTUATOR RETURN
RACK POSITION REFERNCE
RACK POSITION REFERNCE
RACK POSITION MEASURED
RACK POSITION MEASURED
F
RACK POSITION COMMON
RACK POSITION COMMON
G
RACK ACTUATOR PWM SUPPLY
RACK ACTUATOR PWM SUPPLY
A
E
RACK ACTUATOR PWM SUPPLY
EMERGENCY STOP (KEYSWITCH)
H
1.3K OHM RESISTOR JUMPER
D
L
K
C
C
C
B
B
A
A
KEYSWITCH INPUT
BATTERY RETURN (ECM 1)
UNSWITCHED BATTERY VOLTAGE SUPPLY (ECM 3)
ENGINE CRANKSHAFT SPEED RETURN
KEYSWITCH INPUT
B
C
D
FUEL PUMP
A
E
BATTERY RETURN
RACK ACTUATOR RETURN
RACK ACTUATOR RETURN
F
BATTERY 1 VOLTAGE SUPPLY
G
TIMING ACTUATOR PWM SUPPLY
TIMING ACTUATOR PWM SUPPLY
TIMING ACTUATOR RETURN
TIMING ACTUATOR RETURN
RACK POSITION REFERNCE
RACK POSITION REFERNCE
RACK POSITION MEASURED
RACK POSITION MEASURED
RACK POSITION COMMON
RACK POSITION COMMON
RACK ACTUATOR PWM SUPPLY
RACK ACTUATOR PWM SUPPLY
RACK ACTUATOR PWM SUPPLY
E
07
13
04
03
36
46
SAE J1939 DATA LINK SUPPLY
SAE J1939 DATA LINK RETURN
SAE J1939 DATA LINK SHIELD
2
FUEL SHUTOFF VALVE
1
1.3K OHM RESISTOR JUMPER
C
C
B
B
A
A
FUEL SHUTOFF VALVE SUPPLY
09
19
17
18
05
RACK ACTUATOR RETURN
SAE J1939
DATA LINK
SERVICE PORT
CONNECTOR
D
06
ECM 3 CM552
SOURCE ADDRESS
(01) 50 - PIN
CONNECTOR
BATTERY RETURN (ECM 3)
ENGINE CRANKSHAFT SPEED SIGNAL
C
26
UNSWITCHED BATTERY SUPPLY (CM 552 LEFT BANK)
ENGINE POSITION RETURN
B
16
05
ENGINE POSITION SIGNAL
A
43
04
BATTERY 1 VOLTAGE RETURN (ECM 2)
BATTERY
ECM 2 CM850
POWER
CONNECTOR
FUEL SHUTOFF VALVE SUPPLY
FUEL SHUTOFF VALVE RETURN
BATTERY 1 VOLTAGE RETURN
BATTERY 1 VOLTAGE RETURN
BATTERY 1 VOLTAGE RETURN
BATTERY 1 VOLTAGE RETURN
16
26
06
07
13
04
03
36
46
43
20
28
29
30
15 AMP FUSE
9 - PIN ECM 1 AND 3
CEN DATA LINK
SERVICE PORT
CONNECTOR
BATTERY 1 VOLTAGE SUPPLY
BATTERY 1 VOLTAGE SUPPLY
BATTERY 1 VOLTAGE SUPPLY
SECONDARY ID BIT
A
D
E
10 AMP FUSE
BATTERY 1 VOLTAGE SUPPLY
SECONDARY ID BIT
FUEL PUMP RELAY
25 AMP FUSE
CEN DATA LINK 2 ENGINE NETWORK
CEN DATA LINK 2 ENGINE NETWORK
ENGINE POSITION RETURN
LIFT PUMP RELAY SIGNAL
CEN DATA LINK 2 ENGINE NETWORK RETURN
CUMMINS RESPONSIBILITY
1
1
2
Bulletin 4021683 - 02
Cummins Inc.
50 - PIN ENGINE
HARNESS
CONNECTOR PORT
CM850 ECM
CM552 ECM
60 - PIN ENGINE HARNESS
CONNECTOR
50 - PIN OEM HARNESS
CONNECTOR
01
10
01
10
COOLANT LEVEL SENSOR
CONNECTOR MATING FACE
A
60
51
50-PIN ENGINE INTERFACE
CONNECTOR MATING FACE
(CM552)
B
BAROMETRIC PRESSURE SENSOR
CONNECTOR MATING FACE
50-PIN OEM INTERFACE
CONNECTOR MATING FACE
(CM552)
01
10
C
41
50
2
1
01
10
3
TYPE B
41
50
41
50
ENGINE CRANKSHAFT SPEED,
ENGINE POSITION SENSOR
CONNECTOR MATING FACE
B
A
31 - PIN ENGINE SIDE OEM
INTERFACE CONNECTOR B
MATING FACE
16 - PIN ENGINE SIDE OEM
POWER CONNECTOR MATING
FACE
ENGINE COOLANT TRMPERATURE
INTAKE MANIFOLD TEMPEATURE
ENGINE OIL TEMPERATURE SENSORS
CONNECTOR MATING FACE
B
4 - PIN ECM POWER
CONNECTOR MATING FACE
1
4
A
COOLANT PRESSURE, ENGINE OIL
RIFLE PRESSURE, INTAKE MANIFOLD
PRESSURE SENSORS CONNECTOR
MATING FACE
1
9 - PIN SERVICE PORT
CONNECTOR MATING FACE
2
3
3
J1939 TERMINATOR
CONNECTOR MATING FACE
B
A
C
47
42
LIFT PUMP 2 RETURN
CEN DATA LINK 2 ENGINE NETWORK
QST30 CM850 Power Generation Interface
Wiring Diagram
50 - PIN OEM
HARNESS
CONNECTOR
10
2
CEN DATA LINK 2 ENGINE NETWORK
4 - PIN POWER
CONNECTOR PORT
48
LIFT PUMP 1 SUPPLY
SUPPLY
CEN DATA LINK 2 ENGINE NETWORK RETURN
50 - PIN OEM
HARNESS
CONNECTOR
39
SHIELD
LIFT PUMP 2
60 - PIN ENGINE
HARNESS
CONNECTOR PORT
40
SUPPLY
LIFT PUMP 1
OEM RESPONSIBILITY
50
38
BATTERY RETURN
B
C
BATTERY 1 VOLTAGE SUPPLY
2
SHIELD
02
12
44