Murphy MDDM User Manual

Description

The Murphy Display and Diagnostic Module
(MDDM) is the keystone in a line of components
manufactured by FWMurphy as part of its J1939
MurphyLink

TM

System. The J1939 MurphyLink

TM

System has been developed to meet the needs for
instrumentation and control on electronically
controlled engines communicating using the
SAE J1939 Controller Area Network (CAN).

The MDDM is a powerful, easy to use multi­function tool that enables the operator to view
many different engine parameters and engine
service codes.
The MDDM includes a two line by eight charac­ter backlit LCD display. The top line displays
data labels, i.e. "EngHrs". The bottom line dis­plays appropriate units information i.e "80 psi"
for oil pressure.

The UP and DOWN push buttons located on the
front of the MDDM, are used for scrolling through
the parameters and viewing the menu list. Two
LEDs (amber and red) are used to annunciate
active fault messages received by the MDDM.

Other components in the system are micro­processor-based analog gauges for displaying
critical engine data broadcast by the ECM:
engine RPM, oil pressure, coolant temperature,
system voltage, etc., a combination audible
alarm and relay unit for warning and shutdown
annunciation. Up to 32 components may be
linked to the MDDM by an RS485 daisy chained
twisted pair cable up to 1,000 meters from the

MDDM. The MDDM and all connected compo­nents can be powered by 12 or 24 volt systems,
are back lit using LEDs, and are 100% environ­mentally sealed.

Engine Parameters

The following are some of the engine para­meters displayed by the MDDM in English
or Metric units (when applicable):

●

Engine Hours

●

Engine RPM

●

System Voltage

●

% Engine Load at the current RPM

●

Coolant Temperature

●

Oil Pressure

●

Fuel Economy

●

Throttle Position

●

Manifold Air Temperature

●

Current Fuel Consumption

●

Active Service Codes

●

Stored Service Codes from the engine

●

Set the Units for display

●

View Engine Configuration

Parameters

Applications

The Murphy Display and Diagnostic Module is a
low-cost solution for your instrumentation needs
on stationary or mobile equipment applications.

Specifications

Bezel:

Stainless Steel (Black Optional).

Membrane Switch:

Polyester.

Case/Clamp:

Nickel Plated Steel,

Aluminum Killed, QQ-S-698.

Maximum Panel Thickness:

0.30 inch. (8 mm).

Mounting Hole:

2.062 inch (52 mm) in diameter.

Dial:

White on Black.

Reversed Polarity:

Withstands reversed battery terminal
polarity indefinitely within operating
temperatures.

CAN BUS:

SAE J1939 Compliant.

Auxiliary Gage Communication:

RS485.

Operating Voltage:

8 VDC Minimum to 32

VDC Maximum.

Operating Temperature:

-4 to 158°F (-20 to 70°C).

Storage Temperature:

-40 to 185°F (-40 to 85°C).

Shipping Weights (all models):

1 lb. (45 g.).

Shipping Dimensions (all models):

5-1/2 x 5-1/2 x 5-1/2 in. (140 x 140 x
140 mm).

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

MDDM-00071B

Revised 04-02

Catalog Section 78

(00-02-0429)

Murphy Display
and Diagnostic Module

MDDM Series

■

Specifically Designed For SAE J1939 Controller
Area Network (CAN) Equipment Applications

■

Displays Over 30 Standard SAE J1939
Parameters Broadcast by Major Engine and
Transmission Manufacturers’ ECM’s

■

Displays Active Faults and ECM Stored Fault
Codes For Diagnosing Equipment Malfunctions

■

Re-broadcasts Critical Data to MLink

TM

Analog Gages

Alarm (LED)

Amber

Shutdown

(LED) Red

Scroll Down

Scroll Up

MDDM-00071B page 2 of 2

Dimensions

How to Order

To order the MDDM use the model number designation diagram below.

Connector

B = Deutsch

TM

(DT04-08PA)

C = Metri-Pack

TM

(12047931)

D = AMP/Deutsch

TM

(12047931)

Model

MDDM = Murphy Display and

Diagnostic Module

Size

20 = 2-1/16 in. (52 mm) Mounting hole.

Bezel Type

Blank = A-20 Type
A = A-20 Type Black
B = SAE Type Low Profile

MDDM 20 –B–B

Accessories

MurphyLinkTMAnalog Gages

MLA20-A-100-A =

Oil Engine Pressure

MLA20-B-250-A =

Coolant Temperature

MLA20-C-12-A =

Voltmeter 12 VDC

MLA20-C-24-A =

Voltmeter 24 VDC

MLA20-D-100-A =

Percent Load @Current Speed

MLA20-E-400-A =

Gear Oil Pressure

MLA20-F-250-A =

Gear Oil Temperature

MLA35-T-3000-A =

Tachometer

MLA35-S-85-A =

Speedometer

MLAA20 =

Audible Alarm

MLVC2412 =

Regulator for 24 VDC systems

Connector Option “D”

AMP/Deutsch

TM

Connector

Option “C” Metri-Pack

TM

IMPORTANT:

The MDDM display is best viewed

either straight on or at the 6 o’clock position.

Connector Option “B” Deutsch

TM

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

R

E

G

I

S

T

E

R

E

D

USA–ISO 9001:2000 FM 28221

UK–ISO 9001:2000 FM 29422

Printed in U.S.A.

Ø2.03 in.

(52 mm)

Mounting
Clamp

Scroll Up

2.13 in.

(54 mm)

Wires Length
3 in. (76 mm)

P/N: DT04-08PA
8-Way Connector

1.78 in. (45 mm)

Panel 0.30 in. (8 mm)

Alarm (LED)
Amber

Mounting Hole

Ø2.062 in. (52 mm) Dia.

Wires Length
3 in. (76 mm)

Shutdown
(LED) Red

Scroll
Down

P/N: 12047931

8-Way Connector

1.88 in. (48 mm)

maximum thickness

MDDM

Wires Length

25 in. (635 mm)

Mounting
Clamp

P/N: MTA-156

5-Way Connector

0.656 in. (17 mm)

P/N: DT04-3P

3-Way Connector

1.78 in. (45 mm)