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Figure 25 - Engine Monitoring System DisplayThe Engine Monitoring System (EMS) displays various engine/transmission parameters. EMS provides excellent visibility at various light conditions and supports backlight connections.The engine ECM monitors and processes engine operating parameters and diagnostic information. This information is then transmitted to the Engine Monitoring System through the CAT Data Link. The Main EMS Gauge Unit receives and displays information and communicates to the other gauges for display. Only two wires are required from the ECM to the display to transmit/receive all engine operating parameters and diagnostic information.Engine Monitoring System incorporates three individual gauge units which can be installed in various locations to enhance operator and vessel operation. The system has the ability to display vessel speed when connected to a GPS Interface Module. Refer to the GPS Interface Module section for more information.One Main EMS Gauge Unit is required for each desired operator station. The Tachometer and/or Quad-Gauge Units are optional and will NOT operate without connection to a Main EMS Gauge Unit.The following information describes the function and installation requirements of each gauge unit.The Main EMS Gauge Unit has ten (two rows of five) indicators to display system related diagnostics. A digital LCD readout displays the different engine/transmission parameters monitored.Monitored parameters include the following: Engine SpeedEngine Oil PressureEngine Coolant TemperatureTransmission Oil PressureTransmission Oil TemperatureFuel RateEngine HoursEngine (Percent) LoadEngine LocationThe Quad-Gauge Unit has scaled warning zones and displays engine oil pressure, engine coolant temperature, marine gear oil pressure, and marine gear oil temperature in analog format.The Tachometer Unit displays engine rpm on an analog style gauge. Vessel Speed, Engine Synchronization, and Trolling Status are displayed on a digital LCD readout.Engine Monitoring System Power Requirements
The Engine Monitoring System display hardware has a 24 VDC power requirement. If a 12 VDC electrical system is used, the display will require a 12 VDC to 24 VDC (12/24) converter. The 127-8853 12 VDC to 24 VDC Converter is capable of supplying 5 Amps at 24 VDC and can be used in Engine Monitoring System installations in vessels having a 12 VDC electrical system.The 127-8853 case dimensions are: Length ... 140 mm (5.5 in)Width ... 89 mm (3.5 in)Height ... 57 mm (2.7 in) Avoid splicing or soldering wire connections. All connections should be terminated at terminal strips to ensure engine and communication systems reliability. Use 5A circuit protection on the 24 VDC +Battery supply to the display.12 VDC To 24 VDC Converter Connections (12 Volt Vessel Systems ONLY)
1. Connect from the RUN Terminal of the Start Switch to the +V IN Terminal of the 12/24 Converter.2. Connect from the +V OUT terminal to pin-1 on the EMS 40-Pin connector.3. Connect from the station -Battery Bus Bar to the -V OUT Terminal of the 12/24 Converter.4. Connect from the 12/24 Converter -V IN Terminal to the 12/24 Converter -V OUT Terminal.5. Connect from the 12/24 Converter -V OUT terminal to pin-2 on the EMS 40-Pin connector.
Figure 26 - 12 VDC To 24 VDC Connections24 VDC System Connections
1. Connect from the RUN Terminal of the Start Switch to pin-1 on the EMS 40-Pin connector.2. Connect from the -Battery Bus Bar to pin-2 on the EMS 40-Pin connector.
Figure 27 - 24 VDC ConnectionsEngine Monitoring System Gauge Unit Mounting Dimensions
Figure 28 - Gauge Module Dimensions Each module (gauge unit) has identical dimensions. The mounting options with bezels are described below.Each module can be mounted from either the front or rear, and with or without a decorative bezel. Each module has a 5.0 mm (0.20 in) tapped hole in each corner (four holes), a 4 mm (0.16 in) clearance hole in each corner, and four 6 mm (0.24 in) tapped holes in the back housing.Front Mount
The fabricated gauge bracket is NOT required.Bezels must be installed over the front of the module. The 5 mm (0.20 in) screws mount through four corners of the bezel, through the dash panel mounting surface, and into the tapped gauge module holes.Rear Mount
The bracket is required and may be "U" shaped to butt against the dash panel and pull the module tightly against the dash panel. (The bracket shown is a reference. The length of the bracket legs must be adjusted to fit your dash panel.) The bracket can be attached to the module with the 8T3992 screws 6 mm (0.24 in) in the holes on the rear of the moduleThe bezel can then be attached to the gauge module with 7Y7388 screws 5 mm (0.2 in) through the bezel into the tapped holes in the module flange. Screws must not exceed 12 mm (0.47 in) long or they will protrude through the module into the dash panel.Connecting Engine Monitoring Display Modules
Figure 29 - Monitoring Display and Harness Connecting Harness To Gauge Units
1. Connect P1 (40-Pin) gauge connector to Main EMS Gauge Unit.Connecting Tachometer and Quad-Gauge Units
2. Connect P2 (6-Pin) tachometer gauge connector to EMS Tachometer unit.3. Connect P3 (6-Pin) quad-gauge connector to EMS Quad-Gauge unit.24 VDC Battery Connections
4. Connect +Battery Bus Bar to the positive terminal of the Start (Ignition) Switch. Connect the Run terminal of the Start (Ignition) Switch to pin-1 of J1 (12-Pin) EMS Customer Connector.5. Connect -Battery Bus Bar to pin-2 of the J1 (12-Pin) EMS Customer Connector.Connecting CAT Data Link
Refer to the table below for the proper pin numbers for your engine arrangement.1. Connect the PORT and STBD ECM Customer Connector CAT Data Link+ terminals to the CAT Data Link+ terminal of the Engine Room Data Terminal Strip.2. Connect the PORT and STBD ECM Customer Connector CAT Data Link- terminals to the CAT Data Link- terminal of the Engine Room Data Terminal Strip. 3. Connect the CAT Data Link+ terminal of Engine Room Data Terminal Strip to the CAT Data Link+ terminal of the Bridge Data Terminal Strip.4. Connect the CAT Data Link- terminal of Engine Room Data Terminal Strip to the CAT Data Link- terminal of the Bridge Data Terminal Strip.5. Connect