Murphy Portable Generator MGC447 User Manual

MGC-96079B  
Revised 08-02  
Catalog Section 75  
(00-02-0766)  
Digital Generator Panels  
FWMurphy  
MGC447 and MGC547 Series  
Microprocessor-Based Controller  
Digital Engine and Generator Display  
Pre-Programmed, Full Featured  
Built-In Advanced Communications  
MGC547  
Compact Design, NEMA 1 Drip Proof  
Operating Temperature: -4 to 149°F (-20 to 65°C).  
Storage Temperature: -4 to 149°F (-20 to 65°C).  
Relative Humidity: 95%RH @ 60°C (140°F).  
Description  
Features  
Pre-programmed generator panels for typical  
gen-set operations: warm-up, transfer to  
load, run time, engine unload, cooldown.  
The MGC447 and MGC547 generator panels  
provide inexpensive engine and generator  
monitoring and control with digital accuracy.  
These microprocessor-based controllers  
include all basic industry requirements plus  
many value added features such as: remote  
communications and control capabilities; on-  
board real time clock; shutdown history dis-  
play of last 5 shutdowns; service reminders.  
Communications:  
MGC447: 1-RS485 serial port.  
MGC547: 2-RS485 and 2-RS232 serial ports.  
For 3-phase, 4-wire or 1-phase, 3-wire generators.  
Digital readout of all engine and generator  
functions: pressure, temperature, rpm, amps  
and volts. Monitored with first-out shutdown  
annunciation.  
Digital Inputs: 3 optically-isolated, (positive voltage  
or ground) such as from Murphy SWICHGAGE®s.  
Input 1: Auto position on toggle switch  
*
Input 2: Test position on toggle switch  
*
Built-in communication for remote start/stop  
and monitoring engine and generator func-  
tions (MGC547 models).  
Input 3: Spare 1 Input  
Operating parameters are configured through  
a three-button interface. Data is displayed on a  
32-character, back lit alphanumeric liquid  
crystal display. Access to the system memory  
is controlled by entry codes, and the program  
is stored in EPROM.  
Analog Inputs: 7  
Analog 1: Water Temperature Sender  
Analog 2: Engine Oil Pressure Sender  
Analog 3: Low Coolant Input (closed on fault)  
Analog 4: Oil Level Input (closed on fault)  
Optically-isolated noise resistant inputs.  
Open collector transistor outputs.  
Crank and Rest cycle timers, 1 to 300 seconds  
each (adjustable).  
Analog 5: AC Volts (0-5 VDC)  
*
These panels accept a variety of sensor inputs  
such as from Murphy electric gage type resis-  
tive sending units and digital inputs such as  
from SWICHGAGE® instruments.  
Analog 6: AC Amps (0-5 VDC)  
*
Shutdown time delay, 2 to 2000 seconds  
(adjustable), locks out low oil pressure  
and high temperature on start-up.  
Analog 7: Remote Start/Stop  
Frequency Input: 1 optically-isolated for speed  
reference from magnetic sensor (pickup).  
Crank disconnect and overspeed sensing  
operates from a magnetic pickup signal  
(requires 2 Vrms minimum) or alternator  
tachometer terminal.  
The MGC447 and MGC547 feature open col-  
lector transistor type and relay type outputs.  
Outputs: 7  
Output 1: Fuel Solenoid  
Output 2: Starter  
Output 3: Common Fail  
These compact panels measure only 13-1/4 x  
8-1/2 x 12-1/2 inches (337 x 216 x 318 mm), and  
are shock mounted and rated NEMA 1 drip-proof.  
Important: Off-panel items such as senders, mag-  
netic sensors and CT’s must be ordered separately.  
Output 4: Glow Plug**  
Output 5: Generator Regulator Control**  
The MGC547 Series models incorporate built-  
in serial ports for advanced communication  
capabilities. They can communicate with  
remote terminals, such as a computer via  
modem or can automatically dial your pager to  
inform you of the status of the generator.  
Output 6: Phase 2 Selection  
*
Specifications  
NOTE: These specification apply to all models  
unless otherwise indicated.  
Output 7: Phase 3 Selection  
*
NOTE: I/O’s and comm. ports are program specific  
and will vary depending upon the software program  
used. Custom programming is available.  
MGC447 models: EMS447 controller.  
MGC547 models: EMS547 controller.  
Power Requirements:  
*
Internal, not for customer connection.  
The user is able to start or stop the engine, view  
operating parameters and reset or acknowledge  
abnormal conditions from a computer.  
** Open collector transistor type, 300 mA maximum.  
To drive customer supplied relay.  
Auxiliary relay, customer connection is  
form “A” relay contact, 12 V, 40 A; 24 V, 16 A.  
12 VDC battery for 12 V models.  
24 VDC battery for 24 V models.  
 

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