Murphy EA150 User Manual

Model EA150

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Automatic Engine Controller with
Built-in SWICHGAGE®Instruments
And Hourmeter

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Quick and Easy to Install

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Advanced, Rugged, Reliable
Microprocessor Based Design

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Very Competitive Low Cost

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Operates On 12 or 24 Volt Systems

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First-out Shutdown LED

Description

The EA150 Automatic Engine Controller
provides you with simple–yet sophisticated,
engine automation. It features basic auto­matic start/stop capabilities plus other fea­tures found on more sophisticated and
expensive controllers–all in an easy to
install panel.

The EA150 operates from 12 or 24 volt sys­tems. It includes crank and rest cycles, sens­ing circuit for crank disconnect and over­speed, overcrank, and re-crank on false starts.
Four LEDs indicate first-out shutdown for:
low pressure, high temperature, overcrank
and overspeed. A fifth LED for engine run­ning indicates when crank disconnect occurs.

The built-in oil pressure and water tempera­ture SWICHGAGE

®

instruments provide visu­al indication and can be set to initiate shut­down on critical pressure and temperature.

The electromechanical quartz base hourme­ter can record up to 9,999.9 hours. It is
housed in a shockproof case and built to be
rugged and durable for a long life.

A selector switch allows you to manually
select the operation sequence.

Features

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Compact Design

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Adjustable Overspeed circuit

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Adjustable Overcrank circuit

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Adjustable Shutdown Lockout Delay

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Adjustable Crank Disconnect Setpoint

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Engine Running Indication LED

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Re-Cranks Engine on False Starts

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Advanced Microprocessor Technology

Offers Reliability, Small Size, and Low Cost

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Convenient Hat Bracket design for simple
engine mounting

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Built-in Hourmeter

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Temperature SWICHGAGE

®

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Oil Pressure SWICHGAGE

®

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Operates On 12 or 24 volt systems

Specifications

Power Input

12 or 24 VDC.

Operating Temperature

-40 to 185°F (-40 to +85°C).

Outputs

• 5 A relay for cranking and fuel valve.

• 300 mA transistor for engine annunciation.

Cycle Crank Timer

Up to 8 attempts. Re-Cranks on false
starts (fixed 30 seconds).

Crank/Rest Cycle Timing

4 to 25 seconds (adjustable).

Shutdown 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.

Shipping Weight

5 lbs. 4 ozs. (2.38 kgs.).

Shipping Dimensions

9-3/4 x 9-1/2 x 6 in. (248 x 241 x 152 mm).

EA-94013B

Revised 09-96

Catalog Section 30

(00-02-0083)

Automatic Engine Controller

Sequence of Operation

NOTE: The following sequence is pre-pro­grammed into the EA150 Engine Automatic.

Operation Sequence with Panel in Auto

When the EA150 receives an automatic start
signal the engine will begin to crank and the
Shutdown Lockout time delay will begin. The
Shutdown Lockout Delay does two functions. It
allows the EA150 to disregard signals from the
low oil pressure and high temperature SWICH­GAGE®at engine start-up. Also, if the engine
false starts, the re-crank will be delayed to
allow the engine to stop moving before engag­ing the starter. If the engine fails to start after
the set number of crank and rest attempts, the
EA150 will indicate an overcrank condition by
turning on the Overcrank LED. The engine will
be locked out from any further start attempts.

NOTE: All shutdown conditions can be reset
by moving the selector switch into the OFF
position and back into the AUTO position.

Once Crank Disconnect speed is reached the
Engine Running LED will turn on. The engine
will also run at full governed speed while in
operation. If the engine speed exceeds the
Overspeed setpoint, the EA150 will initiate an
engine shutdown and Overspeed LED will turn
on. The engine will be locked out from any fur­ther start attempts.

If a low oil pressure or high temperature condi­tion occurs while the engine is running, the
EA150 will shutdown the engine and the
appropriate LED will turn on. The engine will
be locked out from any further start attempts.
NOTE: The Shutdown Lockout Delay must
have expired to get a shutdown on low oil pres­sure and high temperature.

Operation Sequence with Panel in Test

When the selector 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 mon­itored conditions or until the selector switch is
moved to the AUTO or OFF positions. Keep in
mind, it will still shutdown the engine if a mon­itored condition occurs such as low oil pressure
or high temperature.

How to Order

Specify EA150.

Dimensions

Typical Wiring Diagram

EA-94013B page 2 of 2

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 [e-mail]
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 [e-mail]
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 [e-mail]

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.

7 in.

(178 mm)

High
Temperature

To Starter

Relay**

Ground

LOW PRESSURE

HIGH TEMPERATURE

OVERCRANK

OVERSPEED

ENGINE RUNNING

Low Oil

Pressure

8-1/2 in.

(216 mm)

7-3/4 in.

(197 mm)

Shielded
Cable

Magnetic
Pickup

5-1/2 in.
(140 mm)

TEST OFF AUTO

3 in.

(76 mm)

Start/Stop*
Contact

To Solenoid
Fuel Valve**

131415

6

Relay

1

5

4

Relay

2

3

2

1

Customer Wiring

* Close to start and run. Open to stop.

** When using the EA150 with inductive loads, we recommend

installing a suppression diode across all coils.

1234 5

Selector Switch

Auto

Off

Test

12

11

10

9

8

7

Fuse Lead
To Battery (+)

Hourmeter