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Note: All connections to sensors can be made with stranded hook-up #16-20 gauge wire.
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OIL TEMPERATURE:
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Sensor located on the engine block.
Engine ground provides the return path.
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OIL PRESSURE:
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Oil pressure sensor located on the engine block.
Engine ground provides the return (neg) path.
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| OIL LEVEL |
Float Switch off the oil pan drain plug, similar to a sight gauge.
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WATER TEMPERATURE:
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Water temperature sensor located on the engine.
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MANIFOLD PRESSURE:
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Manifold pressure sensor located on the engine.
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FUEL PRESSURE:
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A single wire to a Fuel Pressure sensor located on the engine fuel line.
Engine ground provides the return (neg) path.
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Vacuum Line RPM Sensing (preferred method)
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Vacuum RPM sensor: This is a sensor that connects to the vacuum line of the
engine intake manifold. This sensor is located within the DEMS-1000 engine
control unit. This is the preferred method of sensing RPM of the engine.
Normally this is the 1/8" NPT connector between the air breather and the air
intake manifold. Quick and simple.
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Alternator RPM SIG INPUT
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Alternator input type: A connection to the alternator coil winding can be
used as an input for the controller. This input is a special connection to the
alternator, some alternators may not have this connection and may require
a modification or special connector. Contact DieselEngineMotor.Com for more
information on this option.
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| Magnetic RPM Pick-Up Sensor |
This is a single wire input from an optional magnetic type pick-up sensor
located on the Bell housing of the engine. This sensor is mounted such as to
pick up the teeth of the fly wheel. Spacing of sensor to the teeth of the
fly wheel is important, see instructions of sensor. Normal spacing will be
between .01 to .035 of a inch. (Optional method of RPM sensing)
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ALTERNATOR AMPS (optional)
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This input is for a 3 wire connection to a current sensor. The sensor is a
Non-contact type, it slips or clamps over the positive output wire from the
alternator. See instructions included with the sensor. This sensor is a
special unit design for this controller. Contact DieselEngineMotor.Com for more
information.
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HYDRAULIC/AIR/FLOW (optional)
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This is a 3 wire input connection from a pressure sensor to measure air or
hydraulic pressure. This sensor is connected to the output of a air or
hydraulic pump and is used to alarm or shut-down if the pressure is not
within the range of the unit.
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FUEL FLOW (optional)
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Sensor is mounted inline with the fuel line to the engine.
This is a 3 wire input from a fuel flow type sensor.
It is used to measure the rate of fuel used per hour (GPM).
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FUEL LEVEL (optional)
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This is a 3 wire connection to a fuel level sensor located in the fuel tank.
This sensor is a special unit design by DieselEngineMotor.Com to be used with
the DEMS-1000 control units.
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LOW ENGINE COOLANT INPUT (optional)
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This is a single wire connection to a level switch in the cooling system of
the engine. The sensor is mounted in a location to detect a low coolant level
within the radiator. The radiator must be grounded to the engine to provide
the return path of the sensor.
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WATER IN FUEL (optional)
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This is a sensor used to detect water in the fuel system. It is a single wire
connection to the sensor, return path is via the engine ground. This sensor
is mounted in the lowest point of the fuel tank or line from the tank.
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AIR FILTER (optional)
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This is a sensor used to indicate the air filter of an engine is dirty and
needs to be cleaned. This sensor is mounted within the air intake and the
filter. This is a single wire connection with the engine ground providing
the return path.
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REMOTE PWR ON/OFF
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This is an input from the remote DEMS display/control unit to control the power
of the DEMS engine control unit. This is a four wire connection from the remote
display/control unit to the engine control unit. Up to several miles using
fiber optics.
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MANUAL START
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This is an auxillary manual start push button or key switch.
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HIGH RPM INPUT
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This is a manual input to change from high to low RPM, to be used in conjuction with a manual start.
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AUTO START
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Typical use would be a float switch initializing an auto start and shut down sequence.
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GENERATOR G1 CARD
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This series of connections is connected to a generator input interface box.
This box is used to monitor the output of a single or three phase generator.
Using Potential and Current Transformers that will monitor up to 5000
amp, 600VAC with DC as an option. User selected 1 or 5 amp terminators.
Both current and voltage is monitored of each phase. This is a special option
for the DEMS, please contact DieselEngineMotor.com for more
information.
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BATTERY +
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This is the main power connection to power the DEMS located on the right side
of the 100 Amp glowplug relay. The connections should be made with #10 gauge
wire. The + terminal is connected to the positive terminal of the battery.
The - is connected to ground of the engine and to the ground of the DEMS
Enclosure.
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GLOW PLUG
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This is the output contacts of the DEMS to turn on the Glow Plug of an Engine.
Use appropriate size wire for the number of glow plugs on the engine. Maximum
100 amp capacity. This relay/contactor is preinstalled in the DEMS engine
enclosure. The front panel key is pressed to turn on the glow plug which
is timed by the DEMS controller. 15 seconds.
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FUEL PUMP
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This is an output to drive a fuel pump for priming and starting the engine.
The + connection connects directly to the electric fuel pump. Power is supplied
from the DEMS controller, 8 amps. The - connection of electric fuel pump
connects to engine ground.
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ALARM
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This is an output contact to be used as an indicator that an alarm status is
active on the engine. This output can be used to turn on a light, horn or both,
up to 8 amps or optional pager/cell phone/Internet messaging system.
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ENGINE SHUTDOWN
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This is an output contact to be used to indicate and shutdown the engine. This
output contact can be used to shutdown the fuel solenoid which stops the fuel
to the engine. The contacts have both normally open and closed contacts
available up to 8 amps. Can be configured to energize fuel shutoff solenoid
for 30 seconds after key switch (shutdown) is turned off without draining
battery.
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RPM ACTUATOR
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This is a PWM (Pulse Width Modulated).
This is the output of the DEMS controller to be used to control the position of
the engine throttle. This is a linear actuator supplied by DEMS. This is a two
wire connection which connects directly to the actuator A and B terminals of
the DEMS-1000 control box.
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RPM SOLENOID
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This is an output to control a solenoid to open the engine throttle lever to a
preset RPM. This is used when not using the RPM Acuator.
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ENGINE ALTERNATOR EXCITER
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This is an output contact to be used to excite a 12 or 24 Volt engine
alternator.
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STARTER SOLENOID
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This is a single wire that connects and activates the starter solenoid of the
engine.
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GENERATOR EXCITER
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This is an output contact to be used to turn on the generator exciter when the
generator is connected to the engine. This contact will close when the engine
is within +/- 2% of the desired RPM. This output closes and turns on the
generator exciter at this time, and is a latched function.
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GENERATOR CONTACTOR
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This could be utilized to control a magnetic contactor on the output of the
generator.
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VIBRATION ALERT: (Optional)
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The DEMS controller can monitor vibration of the engine with a vibration sensor
mounted on the engine block. Part number of the sensor is MA15 made by Honeywell.
This sensor is connected to the controller with a two conductor cable, see
drawing on connection. This monitors the input of the optional vibration
sensor.
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