Description, Basic Program Features | Murphy EMS447 instruction

Electronic Monitoring Systems

EMS-92199B

Revised 05-03

Catalog Section 40

(00-02-0101)

Approved for Cl. I, Div. 2, Grps. C & D areas on EMS447 (all transistor out- puts) and EMS448 (board only).

EMS448

Patent

Pending

EMS447

EMS447 / EMS448 Controllers

■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

Description

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.

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.

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.

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.

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.

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.

Applications

● Industrial Engines	● Compressors
● Generators	● Trucks
● Construction Equipment	● Pumps

Specifications

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).

Display: Alphanumeric: 2-line, 32 character backlit LCD (standard); VFD optional.

Relative Humidity: 95%RH @ 140°F (60°C).

Communications: RS485 port, standard.

Sensor Inputs:

•Digital: 3-optically-isolated inputs, (positive volt- age or ground) such as from Murphy SWICH- GAGE® instruments.(2)(3)

•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).

•Frequency: 1 optically-isolated input for speed reference, such as MP3298 magnetic sensor.

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)

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)

2 DPDT, 2A @ 220 VDC, 250 VAC. (5)

EMS448 Outputs:

•2-Transistor digital: 125 mA sinking.

•4-Relay:2-SPST, 5A @ 30 VDC, 250 VAC*, 1/10 hp @ 120 VAC; (4)

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)

2 DPDT, 2A @ 220 VDC, 250 VAC.(5)

Shipping Weights and Dimensions

EMS447: 2-1/4 lb (1 kg); 9-1/4 x 8-1/4 x 5-1/4 in. (235 x 210 x 133 mm).

EMS448: 3-1/2 lb (1.5 kg); 12-1/4 x 7-1/4 x 5-3/4 in. (311 x 184 x 146 mm).

(1)Program specific.

(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.