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Users Guide: iMFD Sensor Module
iMFD Sensor Module SM-FluidTemp
Version 1.0 January 24, 2007
*Please read the instructions completely through at least once before proceeding with the
installation to minimize errors.
*Double check polarity of power before powering it on for the first time.
Overview:
(Figure 1) (Figure 2)
1. Connects to 12V-18V power source.
2. Analog outputs (0-5V linear output) *For sensor #1 ONLY
3. Termination jumper. Closed for first SM in iMFD daisy chain.
4. Connects to next SM in iMFD daisy chain or to first DM
5. Connects to previous SM or unconnected if first SM in iMFD daisy chain
6. Connects to PLX Fluid Temp Sensor. Up to 2 sensors can be connected for 2 channel operation.
7. Fluid Temperature Sensor. (*Using a sensor not provided by PLX Devices may lead to inaccurate readings due to a
mismatch in calibration)
8. 24k Gold Ring Terminal
9. 24k Gold Female Disconnect Terminal
10. Molex Connector Terminals
11. Molex 2 Pin Connector
Install the Fluid Temperature Sensor:
1. The PLX Fluid Temperature probe screws into a 1/8 NPT tap.
2. Connect the fluid temperature sensor with the provided 2 pin Molex connector according to the following diagram.
Connections can be made by crimping the terminals or soldering th e terminals with the provided wire. *Note the orientation
of the Molex 2 pin connector. A reverse connection will result in inaccurate readings and may damage the device.
Version 1.0 January 24, 2007
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(Figure 3)
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Users Guide: iMFD Sensor Module
Connecting Power to the Unit:
CAUTION! CONNECTING THE SM-FluidTemp IN REVERSE POLARITY
WILL DAMAGE THE UNIT! CHECK CONNECTIONS BEFORE POWERING
ON.
1. The SM-FluidTemp accepts 12-18V DC for power. Connect the negative wire (black) to your vehicle’s ground. This is usually
the negative terminal of your automobile’s battery. Connect the positive wire (red) to your v ehicle’s ignition power. This
power is only supplied when your key is turned passed a specific position and is off when your key is removed. Your power
connection must be capable of supplying at least 1 amp of current. A 5 Amp fuse is recommended for safety.
*If you plan to integrate the SM-FluidTemp with other aftermarket devices by utilizing the analog output signal wire. Make sure that
the negative wire (black) is connected as close as possible to your device's ground. This guarantees that both devices "see" the same
reference ground and a more accurate interpretation of the output voltages will be achieved. Please refer to the PLXApp notes online
for more information.
2. Locate the 2.1mm Power plug. Unscrew the plas tic cover and insert it into the red/black power wires.
3. Solder or crimp the red power wire to the CENTER of the connector. (12-18V)
4. Solder or crimp the black power wire to the SHIELD of the connector. (GROUND)
(Figure 4)
Using the Sensor Module in the iMFD Chain:
1. If the SM-FluidTemp is the only se nsor module or last sensor module in the iMFD chain, be sure to have the terminati on
jumper installed. Otherwise, remove the jumper. Please refer to (Figure 1) for the location of the termination jumper.
(Figure 5)
Using the Sensor Module Analog Output:
1. The SM-FluidTemp has one 0-5V analog output designed to be interfaced with a number of aftermarket products such as
engine management systems, data loggers and tuning electronics. It is not mandatory for you to use this output for your
unit to properly function.
Version 1.0 January 24, 2007
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Users Guide: iMFD Sensor Module
(Figure 6)
Linear Analog Output (0-5V)
Recommended Accessory:
(Figure 8) DM-5 FluidTemp 52mm Gauge. Ideal for affordable Fluid Temperature
monitoring from your SM-FluidTemp
Included Items:
1. SM-FluidTemp main unit
2. 4ft red power wire
3. 4ft black ground wire
4. 4ft gray analog output wire
5. 2.1mm power connector
6. Resistive type fluid temperature sensor (Additional
sensor sold separately)
7. 24k gold ring terminal
(Figure 7)
8. 24k gold female disconnect terminal
9. 2 pin Molex connector with 2 terminals for sensor
10. 16ft sensor wire
11. 4 pin Molex connector with 4 terminals for analog output
12. 1ft Serial Cable
13. Termination jumper
14. Quick start guide
Version 1.0 January 24, 2007
www.plxdevices.com
(408)745-7591
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Users Guide: iMFD Sensor Module
Specifications:
Physical Dimensions 2" x 2.875" x 1.125" (52mm x 75mm x 28mm) L x W x H
Accuracy +- 1 Deg C (+- ~2 Deg F)
Measurement Range 0-150 Deg C (32-302 Deg F)
Analog Outputs Linear 0-5V (Driving Current 20mA)
Operating Voltage 8V-18V
Power Consumption 0.3 Watts
Operating Temperature 0 - 85 Deg C
Sensors Two Resistive Type Temperature Senders
Enclosure Extruded Aluminum
TERMS OF USE
PLX Devices Inc. does not guarantee the Sensor Module functiona lity with any ECU, data logger or other devices that uses the output
signals. Implementation and integration of the Sensor Module with any other device(s) must be done at your own risk. Improper
installation and usage may lead to engine damage. Mount and install the Sensor Module in a location where it does not obstruct the
driver’s view and/or ability to safely control the vehicle.
LIMITED WARRANTY
PLX Devices Inc. warrants this product to be free from defects for 90 days from the date of purchase. If applicable, Oxygen sensors
and other non-serviceable items are excluded from stated warranty. S erviceable goods must be determined by PLX Devices to be
defective before any warranty or replacement is issued. PLX Devices’ ob ligation under warranty shall be limited to repairing or
replacing, under the discretion of PLX Devices, any part proven defective. This warranty is limited to the repair or replacement of
parts in the manufactured good and the necessary labor done to affect its repair or replacement.
SERVICE UNDER WARRANTY
In the unlikely event that your PLX Devices hardware should fail during the warranty period, a Return Material Authorization number
(RMA) must be first retrieved from PLX Devices Customer Support. Support can be contacted through email:
or by phone: 408-745-7591. All serviceable goods must be packaged securely with proof of purchase, RMA number, with all shipping
charges prepaid and shipped to PLX Devices Inc. Goods returned under warranty must be received by PLX Device s Inc. within ten
(10) business days after the RMA number has been issued. Goods received after this period is subject to fees for the service of repair
or replacement. All repaired or replaced items shall be warranted for the remainder of the original product warranty.
RETURNS AND RESTOCKING FEE
A 15% restocking fee will apply to applicable PLX Devices products for refund. All returns are to be packed in original condition
including packaging, documentation, m a nuals, and accessories. Returns that do not include all the accessories and components may
be returned to the customer or charged on a per item basis. The customer assumes responsibility for product until receip t at PLX
Devices Inc., shipping via an insurable carrier is recommended. Any unauthorized shipping charges will be billed to the customer or
shipment will be refused.
DISCLAIMER
PLX Devices Inc. shall not be liable for direct, special, incidental, or consequential damages resulting from any legal theory including,
but not limited to, lost profits, downtime, goodwill, damage, injury to persons, or replacement of equipment and property due to
improper installation, integra tion and/or misuse of any PLX Devices Inc.’s product(s). This warranty applies to the original purchaser
of product and is non-transferable. All i mplied warranties shall be limited in dura tion to the said 90 day warranty period.
Revision History
Version 1.0 (1/24/07) Initial release
Version 1.0 January 24, 2007
www.plxdevices.com
(408)745-7591
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