Murphy Network Card EMS447 User Manual

EMS-92199B  
Revised 05-03  
Catalog Section 40  
(00-02-0101)  
Electronic Monitoring Systems  
EMS448  
R
R
C
EMS447 / EMS448 Controllers  
Approved for Cl. I,  
Div. 2, Grps. C & D  
areas on EMS447  
(all transistor out-  
puts) and EMS448  
(board only).  
Full Equipment Protection(1)  
Field Adjustable Parameters(1)  
First-Out Shutdowns and/or Alarms(1)  
Shutdown History File(1)  
Service Reminders(1)  
Back Lit LCD or VFD Alphanumeric Display  
1/4 DIN or NEMA 4X Enclosed Models  
Patent  
Pending  
EMS447  
Frequency: 1 optically-isolated input for speed  
reference, such as MP3298 magnetic sensor.  
Description  
Basic Models  
EMS448 has an extruded aluminum enclosure  
suitable for panel mounting. Wiring is via  
optional wiring harness. Relay boards are  
available for additional relay contact capabil-  
ity. Refer to “Accessories” on the back page.  
The EMS447 and EMS448 Electronic Monitoring  
Systems/Controllers are micro-processor based for  
monitoring and control of equipment functions. The  
basic EMS system is programmed for a typical  
industrial engine power unit. Custom programming  
is available to adapt the EMS to a wide variety of  
engine and equipment requirements.  
EMS447 Outputs:  
3-Transistor digital: 125 mA sinking.(4)  
3-Relay: SPST 3A @ 30VDC N.O. connected to  
battery positive*.  
S449-4 Relay Board (optional)*:  
2-Transistor digital: 125 mA sinking.  
4-Relay: 2-SPST, 5A @ 30 VDC, 250 VAC,  
1/10 hp @ 120 VAC;(4)  
EMS448 has a NEMA 4X type enclosure. Wiring is  
connected directly to the relay board terminal  
block located within the enclosure. Relay board  
for additional relay contact capability is avail-  
able. See “Optional Accessories” on reverse side.  
Basic programs provide auto-start/manual start and  
first-out shutdown for engine functions such as pres-  
sure, temperature, level and overspeed. Necessary  
time delays for start up lockout are included.  
Operating data is displayed on a 32 character back  
lit alphanumeric liquid crystal display.  
The EMS operating parameters are configured  
through a simple three-button interface. Access to  
the system memory is controlled by entry codes.  
A password-protected program uses built-in memo-  
ry to display the alarm/shutdown history, including  
a display of the last ten shutdowns, when and why  
they occurred and displays all of the engine operat-  
ing conditions at time of last shutdown.  
2-DPDT, 2A @ 220 VDC,250 VAC. (5)  
S449-2 Relay Board (optional)*:  
6-Dry Relay: 4 SPST, 5A @ 30 VDC, 250 VAC,  
1/10 hp @ 120 VAC; (4)  
Applications  
2 DPDT, 2A @ 220 VDC, 250 VAC. (5)  
Industrial Engines  
Generators  
Compressors  
Trucks  
EMS448 Outputs:  
2-Transistor digital: 125 mA sinking.  
4-Relay: 2-SPST, 5A @ 30 VDC, 250 VAC*,  
1/10 hp @ 120 VAC;(4)  
Construction Equipment  
Pumps  
Specifications  
2-DPDT, 2A @ 220 VDC,250 VAC. (4)  
S449-1 Relay Board (optional)*:  
6-Dry Relay: 4 SPST, 5A @ 30 VDC, 250 VAC,  
1/10 hp @ 120 VAC; (4)  
Input Voltage: 10 to 28 VDC.  
Operating Temperature: -4 to 149°F (-20 to 65°C).  
Storage Temperature: -4 to 149°F (-20 to 65°C).  
2 DPDT, 2A @ 220 VDC, 250 VAC.(5)  
Display: Alphanumeric: 2-line, 32 character  
backlit LCD (standard); VFD optional.  
Shipping Weights and  
Dimensions  
EMS447: 2- /4 lb (1 kg); 9- /4 x 8- /4 x 5- /4 in. (235  
Relative Humidity: 95%RH @ 140°F (60°C).  
Communications: RS485 port, standard.  
Sensor Inputs:  
Basic Program Features  
An on-board hourmeter keeps a log of equipment  
running hours and alerts you when to change oil,  
filters and perform other routine service.  
1
1
1
1
x 210 x 133 mm).  
Digital: 3-optically-isolated inputs, (positive volt-  
age or ground) such as from Murphy SWICH-  
GAGE® instruments.(2)(3)  
1
1
1
3
EMS448: 3- /2 lb (1.5 kg); 12- /4 x 7- /4 x 5- /4 in.  
(311 x 184 x 146 mm).  
(1)  
Analog: Up to 8 inputs–accepts a variety of resis-  
tive sending units, such as from Murphy electric  
gage senders. NOTE: When resistive sending  
units are used, one input will be designated for  
battery voltage sensing. The use of 2-wire type  
senders is strongly recommended. Special order  
analog inputs available (4-20 mA or 0-5 VDC).  
Program specific.  
Ramp Oil Pressure monitoring protects equip-  
ment at both high rated speed and low idle speed.  
For instance, based on engine manufacturer’s  
requirement, shutdown could occur at 30 lb. (207  
kPa) pressure at 1800 RPM or at 5 lb. (34 kPa) at  
600 RPM or any shutdown point in between.  
(2)  
One additional input can be ordered and traded for one transistor output.  
(3)  
Isolates the internal circuitry of the Murphy EMS from the sensor  
input circuitry to help avoid electrical noise and damage.  
(4)  
One additional output can be ordered and traded for one digital input.  
(5)  
One DPDT pole has common connected to battery+. N.O. available  
fused and unfused.  
*Not Class I, Division 2 approved.  
 

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