Murphy Display
and Diagnostic Module
Shutdown
(LED) Red
Alarm (LED)
Amber
MDDM-00071B
Revised 04-02
Catalog Section 78
(00-02-0429)
MDDM Series
■ Specifically Designed For SAE J1939 Controller
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Description
The Murphy Display and Diagnostic Module
(MDDM) is the keystone in a line of components
manufactured by FWMurphy as part of its J1939
MurphyLinkTM System. The J1939 MurphyLinkTM
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
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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
Analog Gages
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.
TM
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
Dimensions
IMPORTANT: The MDDM display is best viewed
either straight on or at the 6 o’clock position.
Panel 0.30 in. (8 mm)
Alarm (LED)
Amber
maximum thickness
Shutdown
(LED) Red
Mounting
Clamp
Ø2.03 in.
(52 mm)
MDDM
Scroll
Down
Connector Option “D” AMP/DeutschTM
Ø2.062 in. (52 mm) Dia.
Connector Option “B” DeutschTM
Wires Length
3 in. (76 mm)
Connector Option “C” Metri-PackTM
Wires Length
3 in. (76 mm)
P/N: DT04-08PA
8-Way Connector
1.78 in. (45 mm)
P/N: 12047931
8-Way Connector
1.88 in. (48 mm)
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
MDDM 20 – B – B
Connector
B = DeutschTM (DT04-08PA)
C = Metri-PackTM (12047931)
D = AMP/DeutschTM
(12047931)
MURPHY DE MEXICO, S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
+52 444 8206264 fax +52 444 8206336
Villahermosa Office +52 993 3162117
e-mail [email protected]
www.murphymex.com.mx
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
+44 1722 410055 fax +44 1722 410088
e-mail [email protected]
www.fwmurphy.co.uk
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West
Palmdale, California 93551-1442; USA
+1 661 272 4700 fax +1 661 947 7570
e-mail [email protected]
www.murphyswitch.com
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
+61 3 9358 5555 fax +61 3 9358 5558
e-mail [email protected]
RE
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100
fax +1 918 317 4266
e-mail [email protected]
www.fwmurphy.com
Bezel Type
Blank = A-20 Type
A = A-20 Type Black
B = SAE Type Low Profile
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819; Rosenberg, Texas 77471; USA
+1 281 633 4500 fax +1 281 633 4588
e-mail [email protected]
P/N: DT04-3P
3-Way Connector
1.78 in. (45 mm)
TM
To order the MDDM use the model number designation diagram below.
Size
20 = 2-1/16 in. (52 mm) Mounting hole.
Wires Length
25 in. (635 mm)
Accessories
MurphyLink Analog Gages
How to Order
Model
MDDM = Murphy Display and
Diagnostic Module
P/N: MTA-156
5-Way Connector
0.656 in. (17 mm)
GI
D
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Mounting Hole
2.13 in.
(54 mm)
E
Mounting
Clamp
STER
USA–ISO 9001:2000 FM 28221
UK–ISO 9001:2000 FM 29422
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.
Printed in U.S.A.
MDDM-00071B page 2 of 2
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