Murphy MURPHYMATIC ASM150 Owner's manual

Description
The ASM150 is a solid-state, automatic engine controller with automatic
start/stop capabilities.
TheASM150 operates from a 12 or 24 volt battery. It includes selectable
crank and rest cycles, sensing circuit for crank disconnect and overspeed,
overcrank, and re-crank protection on false starts. Four LEDs indicate first-out
shutdown for: low oil pressure, high temperature, overcrank and overspeed.A
fifth LED indicates engine running.
The ASM150 mounts flush in a panel and is ideal for small generator or
engine panels.
Specifications
Power Input: 12 or 24 VDC.
Operating Temperature: -40 to 185°F (-40 to +85°C).
Inputs: Ground or positive inputs for high temperature or low pressure sensors.
Outputs: 5 A relay for cranking and fuel valve. 300 mA transistor for fault
annunciation.
Cycle Crank Timer: Up to 8 attempts. Re-Cranks on false starts (fixed 30 sec.).
Crank/Rest Cycle Timing: 4 to 25 seconds (adjustable).
Lockout Time Delay: 1 to 25 seconds (adjustable). Locks out low oil and
high temperature on start-up.
Crank Disconnect Speed Setting: From 30 to 8500 Hz.
Overspeed Trip Point Setting: From 30 to 8500 Hz.
Magnetic Pickup Input: Requires 2V rms minimum.
Installation Accessories
● Tools as needed for module mounting, such as drill and screw driver.
● 10 and 14 AWG (6.0 mm2and 2.5 mm2) wire for hook up.
● Set of wire termination tools.
● Wire termination; such as spade terminals.
ASM150 MURPHYMATIC®Micro-controller
Installation and Operation Instructions
Please read the following information before installing.A visual inspection of this product for damage
from shipping is recommended before installing. It is your responsibility to have a qualified person install
this unit and make sure it conforms to local codes.
GENERAL INFORMATION
WARNING
BEFORE BEGINNING INSTALLATION OFTHIS MURPHY PRODUCT
✔Disconnect all electrical power to the machine.
✔Make sure the machine cannot operate during installation.
✔Follow all safety warnings of the machine manufacturer.
✔Read and follow all installation instructions.
ASM150 Mounting Dimensions
ASM-92152N
Revised 01-04
Section 40 and 75
(00-02-0198)
12345
3 in.
(76 mm)
3 in. (76 mm)
0.525 in. (13 mm)
2.828 in. (72 mm)
DIP switches
Potentiometers
3-1/4 in. (83 mm)
3-1/4 in.
(83 mm)
Mounting Drill Pattern
Back ViewFront View
Side View
0.828 in. (21 mm)
1.925 in. (49 mm)
1.575 in. (40 mm)
1.225 in. (31 mm)
0.875 in. (22 mm)
0.525 in. (13 mm)
0.428 in. (11 mm)
Origin
2.928 in. (74 mm)
0.203 in. (5 mm) dia.
0.203 in.
(5 mm)
diameter
0.250 in. (6 mm) dia.
LOW PRESSURE
HIGH TEMPERATURE
OVERCRANK
OVERSPEED
ENGINE RUNNING
model by
ASM 150
®
Mounting the ASM150 Module
1. To mount the ASM150 module to your panel or wall, drill five (0.250 in.
[6 mm] dia.) holes for LED indicators, and two (0.203 in. [5 mm] dia.) holes for
mounting screws. See “Mounting Drill Pattern”, above, for dimensions.
2. Insert the ASM150 module from the back of the panel or wall into the pre-drilled
holes. See schematic below.
3. Remove the adhesive cover from the back of the ASM150 label and position the
label on the panel or wall–press firmly.
Make sure the panel is clean
and free of oil.
4. Secure the label and module
in place with the two
screws provided.
LOW PRESSURE
HIGH TEMPERATURE
OVERCRANK
OVERSPEED
ENGINE RUNNING
model by
ASM 150
®
Label
Screws
Module
Panel or Wall
CAUTION: Certain danger to human and to equipment
such as applied in a mobile or marine application may occur
if some equipment is stopped without pre-warning. It is there-
fore, recommended that monitored functions be limited to
alarm only or to alarm before shutdown in such applications.
ASM-92152N page 1 of 4

The ASM150 is a pilot duty device. The outputs are designed for control only.
1. Wire the ASM150, using 14 AWG (2.5 mm2) stranded wire. When wiring to
terminals 2, 13, and 14 (terminals for the power connections), we suggest
using larger wire size (10 AWG [6.0 mm2] recommended), this will help to
carry necessary power to the unit during an engine start.
2. When hooking the battery positive (+) and ground wires to the ASM150, route
them directly from the battery to the unit. This will help reduce electrical noise
coupling and avoid voltage losses from other devices.
3. If a standby battery charger is installed, it must be wired directly to the battery,
NOT to the ASM150. This could cause electronic "noise" produced by the
charger to be coupled into the microprocessor. If the "noise" is severe, erratic
operation could occur.
4. Do not route low voltage DC (battery) control wires in the same conduit as
high voltage AC wires.
5. Use shielded cable for connecting the magnetic pick up to the ASM150.
Ground only one end of the shield (suggest to ground it at the engine).
6. Always place reverse bias diodes across inductive loads (see “Typical Wiring
Diagram”, Note: 2, below). This increases the contact life and helps eliminate a
source of electro magnetic noise.
7. Outputs 6 and 15 are rated for 5 A. Outputs 7, 8, 9, 10, 11, and 12 are rated for
300 mA.
8. Output 7 “Engine Fail IN/OUT” can be used as remote failure output. An exter-
nal device supplying battery positive (+) to the terminal will cause a shutdown.
WARNING: Disconnect ALL electrical power before beginning the wiring. STOP ALL machinery before performing the hook up.
Any load connected to the panel which draws current in excess of 5 Amps MUST be piloted at the load. Do NOT short output to ground.
1234 5
Relay
1
Relay
2
1
2
3
4
5
6
7
8
9
10
11
12
Solenoid
Fuel Valve
131415
Auto
Off
Test
Selector
Switch
Magnetic
Pickup
12/24VDC
Battery
Low Oil Pressure
1
1
3
High Temperature
Overcrank
Overspeed
NOTES
Engine Running
Engine Failure
Normally Open
Push Button
For Lamp Test
Remote
Start/Stop
Switch
Shielded
Cable
Close to start and run, open to stop.
2
Load not to exceed 5 A. Place reverse
bias diodes across induction loads.
3
Remote lights (if used) not to exceed 300 mA.
Starter
Assembly
Pilot
Relay
2
2
High
Temperature
Low Oil
Pressure
WIRINGTHE ASM150
MAKING ADJUSTMENTSTO THE ASM150
Typical Wiring Diagram
On the back of theASM150, you will find four
(4) potentiometers and five (5) DIP switches
for customizing your controller. The four
potentiometers are designated as follows:
R1 = OverspeedAdjustment
R2 = Crank DisconnectAdj.
R3 = Crank / Rest TimeAdj.
R4 = Shutdown Lockout DelayAdj.
Please note, the factory default set-
tings are approximately 3750 Hz
OVERSPEED, 600 Hz CRANK DIS-
CONNECT, 10 Seconds CRANK/REST,
5 CRANKING ATTEMPTS and 25 Seconds
for SHUTDOWN LOCKOUT DELAY.
Overspeed (R1 Pot)
The OVERSPEED adjustment prevents the
engine from being damaged if there is a malfunc-
tion which causes the engine speed to exceed the
recommended speed.
To set the OVERSPEED value, turn the
OVERSPEED Pot (R1) fully clockwise and
run the engine up to the maximum operating
speed. Next, slowly turn the Pot (R1) coun-
terclockwise until the engine shuts down on
OVERSPEED. Now, turn Pot (R1) clockwise
two turns. This will adjust the OVERSPEED set-
point slightly higher than the maximum engine
operating speed.
Relay
2
Potentiometers
DIP
Switches
1
2
3
4
7
8
123 4 5
ON
R1
R2
R3
R4
25 Turn Pot
ASM150 Module
Back View Detail Potentiometer
Detail
ASM-92152N page 2 of 4

MAKING ADJUSTMENTSTO THE ASM150 continued
SEQUENCE OF OPERATIONS
Sequence of Operations with Panel in “Auto”
When the ASM150 receives an automatic start signal from the remote start con-
tacts, it cranks the engine until CRANK DISCONNECT speed is reached. At this
time, the SHUTDOWN LOCKOUT time delay will begin timing and the ENGINE
RUNNING light will be lit. It will continue to run until it is no longer needed or a
malfunction occurs. The SHUTDOWN LOCKOUT DELAY serves a dual purpose.
It causes the ASM150 to disregard the signals to the OIL PRESSURE and WATER
TEMPERATURE terminals at engine start-up. It is also a delay which, if the engine
false starts before the delay expires, causes the engine to RE-CRANK after a fixed
delay (35 seconds), to let the engine stop moving before engaging the starter.
If the engine fails to start after the user adjustable number of crank and rest
attempts, the ASM150 will annunciate an OVERCRANK condition on the LED's
and lockout the engine from any further start attempts. The OVERCRANK condi-
tion can be reset by moving the Test - Off - Auto switch into the "OFF" position and
back into the "AUTO" position.
If the engine speed exceeds the OVERSPEED setpoint (user adjustable), the ASM
150 will shut down the engine, and annunciate OVERSPEED as the cause of shut-
down on the LED's, and lockout the engine from any further start attempts. The
OVERSPEED condition can be reset by moving the Test - Off - Auto switch into
the "OFF" position and back into the "AUTO" position.
If a low oil pressure condition occurs while the engine is running, the ASM150 will
shut down the engine and annunciate "LOW PRESSURE" on the LED's and lock-
out the engine from any further start attempts. Please note that the SHUTDOWN
LOCKOUT DELAY must have expired to get a shutdown on low oil pressure or
high water temperature. This is also reset by moving the Test - Off - Auto switch
into the "OFF" position and back into the "AUTO" position.
If a high engine temperature condition occurs while the engine is running and after
the SHUTDOWN LOCKOUT DELAY has expired, the ASM150 will shutdown
the engine and annunciate "HIGH TEMPERATURE" on the LED's and lockout the
engine from any further start attempts. This is also reset by moving the Test - Off -
Auto switch into the "OFF" position and back into the "AUTO" position.
Sequence of Operations with Panel in “Test”
When the Test - Off - Auto switch is placed in the "TEST" position, an automatic
start signal is simulated. Therefore, the controller will operate the same as it does in
"AUTO." However, it will continue to run as long as there are no signals from mon-
itored conditions or until the Test - Off - Auto switch is moved to the "AUTO" or
"OFF" positions. Keep in mind, it will still shut down the engine if a monitored
condition occurs such as low oil pressure or high temperature.
Crank Disconnect (R2 Pot)
The CRANK DISCONNECT adjustment is used to let the ASM150 know when the
engine has started so that it will disengage the starter. First, set the throttle at a slow
idle (as slow as the Engine will run while cold, plus 100 or 200 RPM). Now, turn the
Pot (R2) fully clockwise, loosen the crank wire at Terminal #6. Cause the engine to
start and immediately disconnect the crank wire (terminal #6) to prevent further
cranking. Slowly turn the Pot (R2) counter-clockwise until the green light (Engine
Running) turns ON. This adjustment must be complete within 90 seconds, or the
engine will shut down indicating OVERCRANK. If this happens, simply connect
the crank wire (terminal #6), enable starter circuit, manually reset and try again.
Crank / Rest Time (R3 Pot)
The CRANK/REST TIME refers to the length of time the ASM150 will crank the
engine and then rest the starter between cranks. This time is adjustable between 4
and 25 seconds. To increase the setting, turn the Pot (R3) clockwise; to decrease
the setting, turn Pot (R3) counterclockwise.
Shutdown Lockout Delay (R4 Pot)
The SHUTDOWN LOCKOUT DELAY adjustment is used to disregard any signal
from the Low Oil Pressure and High Temperature switches. When an engine first
starts, there is no oil pressure. Because of this, the SHUTDOWN LOCKOUT
DELAY must be set so the engine oil pressure and coolant temperature can reach
normal operating ranges. When starting a cold engine, it takes a few seconds for the
oil pressure to build up which would cause the unit to shutdown the engine unnec-
essarily. This is also true with coolant temperature when starting a hot engine. This
delay is adjustable between 1 and 25 seconds and begins timing as soon as CRANK
DISCONNECT occurs. To increase the setting, turn the Pot (R4) clockwise; to
decrease the setting, turn Pot (R4) counterclockwise.
Overcrank Adjustments (DIP Switches)
The ASM150 allows you to crank the engine once and signal OVERCRANK if it
fails to start, or you can configure it to crank the engine several times before it sig-
nals OVERCRANK. See the “DIP Switch Setting Chart” (at right) for the number
of cranking attempts you would like to have for your specific application.
If you would like only one crank, move Switch 4to ON. Remember, that by
switching Switch 4ON, the ASM150 will only
crank one time. Now, move Switch 1through
Switch 3to the number you would like to multiply
the CRANK/REST TIME by and then add to the
CRANK/REST TIME. The formula for calcu-
lating single crank time is as follows:
Single Crank Time = (Crank/Rest Time X Dip
Switch Attempts) + Crank/Rest Time.
For example, if Switch 1through Switch 3were
all OFF and the CRANK/REST TIME is set to 10
seconds, then the single crank would be 20 seconds
because (10 X 1) + 10 = 20.
If Switch 1through Switch 3were all ON and the CRANK/REST TIME is set to
10 seconds, then the single crank would be 90 seconds because (10 X 8) +10 = 90.
You can also achieve a single crank by setting Switch 1through Switch 4to OFF.
However, this single crank can only range between 4 and 25 seconds depending on
the setting of the CRANK/REST TIME pot.
If the engine false starts and the ASM150 RE-CRANK's the engine, it will count
this as a cranking attempt. This way, if the engine false starts the same number of
times as your cranking attempts, then the unit will show OVERCRANK.
Please note: Switch 5is not used for any function on theASM150.
Crank Attempts Switch 1 Switch 2 Switch 3
1 OFF OFF OFF
2 OFF ON OFF
3 ON OFF OFF
4 ON ON OFF
5 OFF OFF ON
6 OFF ON ON
7 ON OFF ON
8ONONON
123 4 5
ON
Move Switch Up
To Turn ON
DIP Switch Setting Chart
NOTE: Switch 5is not used. Values in the chart are true only when Switch 4is in the OFF
position. When Switch 4is in the ON position, there will be only one crank attempt.
DIP Switches
Detail
ASM-92152N page 3 of 4

TROUBLESHOOTING INFORMATION
WARNING: Make sure voltage and current requirements are within the ASM150 ratings. Determine the polarity for the
application. Use appropriate wire size for voltage and current. Do NOT route/bundle AC POWER wires with any other wiring.
These instructions will assist in the correction of most problems which you may encounter with the unit. Before checking the
list, first check all wiring and connections. If problems persist after the checks, consult any Murphy facility.
SYMPTOM CORRECTIVE ACTION
When Test - Off - Auto Switch is placed in the
TEST Position, nothing happens. Check your fuse to make sure it is good. Use a SFE 14 fuse. If good, check with a meter
to see that battery (+) is present on middle terminal of toggle switch. Also, confirm volt-
age is present at terminal 13 when switch is in TEST position.
Starter does not hold in long enough for the
engine to start. Unit is possibly seeing a voltage drop. Ensure that battery is hooked directly to unit,
14 AWG wire is used, and no short circuits are present. Also make sure that the crank
disconnect pot (R2) is turned up high enough.
Odd, erratic behavior is noticed. Check to ensure that all alternator and ignition wiring is routed in a separate wiring loom
from the rest of the control wiring. Also, confirm the use of shielded cable for the mag-
netic pickup. Resistor type spark plug wires and/or RF type spark plugs may be neces-
sary for spark ignition engines.
Unit will not start when remote start / stop
contact closes
Unit shuts down on oil pressure soon after
start.
Move panel mounted Test - Off - Auto switch to the “AUTO” position.
Check oil level. Turn up shutdown lockout delay pot (R4) to increase lockout time and
give engine time to develop oil pressure.
Engine cranks but never starts. Make sure your fuel valve circuit is wired to terminal 15.
Engine starts but green light blinks on briefly
then goes out for 35 seconds. This occurs the
same number of times set for crank attempts.
Engine is then shutdown on Overcrank.
Verify the number of teeth on flywheel and engine running speed. Using the following for-
mula RPM ÷ 60 x Teeth = Hertz, determine the engine frequency in hertz. Also, determine
the date code and revision number for your ASM150 unit. This information is printed on the
side of the module. Call Murphy with this information to further trouble shoot the problem.
Output appears not to function. Tighten connections to back of ASM150. Usually a good tight torque on the screw will
solve this problem.
You can verify operation by hooking a lamp to the suspect output. If the light does not
come on when it should, call Murphy.
ASM-92152N page 4 of 4
Warranty
A limited warranty on materials and workmanship is given with this FW Murphy product.
A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819; Rosenberg, Texas 77471; USA
[phone] fax [phone]
e-mail [e-mail]
MURPHY DE MEXICO, S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
[phone] fax [phone]
Villahermosa Office [phone]
e-mail [email protected]
www.murphymex.com.mx
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
[phone] fax [phone]
e-mail [e-mail]
www.fwmurphy.co.uk
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West
Palmdale, California 93551-1442; USA
[phone] fax [phone]
e-mail [email protected]
www.murphyswitch.com
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
[phone] fax [phone]
e-mail [email protected]
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
[phone]
fax [phone]
e-mail [e-mail]
www.fwmurphy.com
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USA–ISO 9001:2000 FM 28221
UK–ISO 9001:2000 FM 29422
Printed in U.S.A.