Murphy Network Card MDDM User Manual

Murphy Display  
and Diagnostic Module  
MDDM-00071B  
Revised 04-02  
Catalog Section 78  
(00-02-0429)  
MDDM Series  
Shutdown  
(LED) Red  
Alarm (LED)  
Amber  
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  
TM  
Scroll Up  
Scroll Down  
Re-broadcasts Critical Data to MLink  
Analog Gages  
MDDM. The MDDM and all connected compo-  
nents can be powered by 12 or 24 volt systems,  
are back lit using LEDs, and are 100% environ-  
mentally sealed.  
Description  
Specifications  
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).  
Bezel: Stainless Steel (Black Optional).  
Membrane Switch: Polyester.  
Case/Clamp: Nickel Plated Steel,  
Aluminum Killed, QQ-S-698.  
Engine Parameters  
The following are some of the engine para-  
meters displayed by the MDDM in English  
or Metric units (when applicable):  
Maximum Panel Thickness:  
0.30 inch. (8 mm).  
Mounting Hole:  
2.062 inch (52 mm) in diameter.  
Dial: White on Black.  
The MDDM is a powerful, easy to use multi-  
function tool that enables the operator to view  
many different engine parameters and engine  
service codes.  
The MDDM includes a two line by eight charac-  
ter backlit LCD display. The top line displays  
data labels, i.e. "EngHrs". The bottom line dis-  
plays appropriate units information i.e "80 psi"  
for oil pressure.  
Engine Hours  
Reversed Polarity:  
Engine RPM  
Withstands reversed battery terminal  
polarity indefinitely within operating  
temperatures.  
System Voltage  
% Engine Load at the current RPM  
CAN BUS: SAE J1939 Compliant.  
Coolant Temperature  
Auxiliary Gage Communication: RS485.  
Oil Pressure  
Operating Voltage: 8 VDC Minimum to 32  
VDC Maximum.  
Fuel Economy  
Operating Temperature:  
-4 to 158°F (-20 to 70°C).  
Throttle Position  
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.  
Manifold Air Temperature  
Storage Temperature:  
-40 to 185°F (-40 to 85°C).  
Current Fuel Consumption  
Active Service Codes  
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).  
Stored Service Codes from the engine  
Other components in the system are micro-  
processor-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  
Set the Units for display  
View Engine Configuration  
Parameters  
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  
Applications  
The Murphy Display and Diagnostic Module is a  
low-cost solution for your instrumentation needs  
on stationary or mobile equipment applications.  
 

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