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Users Guide: iMFD Sensor Module

Version 1.0 March 14, 2008

www.plxdevices.com

(408)745-7591

iMFD Sensor Module SM-Fluid Pressure

*Please read the instructions completely through at least once before proceeding with the

installation to minimize errors.

*DO NOT use this sensor for Fuel Pressure sensing purpose

*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 Pressure Sensor. Up to 2 sensors can be connected for 2 channel operation.

7. Fluid Pressure Sensor (150psi). (*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. Molex Connector Terminals

10. Molex 2 Pin Connector

Install the Fluid Pressure Sensor:

1. The PLX Fluid Pressure probe screws into a 1/8 NPT tap.

2. Connect the fluid pressure sensor with the provided 2 pin Molex connector according to the following diagram. It should

connect to the port “G” on the sensor. Connections can be made by crimping the terminals or soldering the 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.

Summary of content (6 pages)

PAGE 1
Users Guide: iMFD Sensor Module iMFD Sensor Module SM-Fluid Pressure Version 1.0 March 14, 2008 *Please read the instructions completely through at least once before proceeding with the installation to minimize errors. *DO NOT use this sensor for Fuel Pressure sensing purpose *Double check polarity of power before powering it on for the first time. Overview: (Figure 1) (Figure 2) 1. 2. 3. 4. 5. 6. 7. Connects to 12V-18V power source.
PAGE 2
Users Guide: iMFD Sensor Module (Figure 3a) (Figure 3b, Port “G”) Connecting Power to the Unit: CAUTION! CONNECTING THE SM-FluidPressure IN REVERSE POLARITY WILL DAMAGE THE UNIT! CHECK CONNECTIONS BEFORE POWERING ON. 1. The SM-FluidPressure 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 vehicle’s ignition power.
PAGE 3
Users Guide: iMFD Sensor Module (Figure 5) Using the Sensor Module Analog Output: 1. The SM-FluidPressure 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. (Figure 6) Linear Analog Output (0-5V) Pressure Versus Output Voltage 5.0 Voltage = 0.025 * Pressure (PSI) 4.5 Output Voltage 4.0 3.5 3.0 2.5 2.0 1.5 1.
PAGE 4
Users Guide: iMFD Sensor Module While the power input of the lamp and buzzer can be 12V or 3.3V, the ground side of the lamp or the buzzer needs to be connected to the “WK” lead of the sensor. (Figure 8, connection illustration of lamp or buzzer) Caution: please follow the power input ratings indicated on the buzzer or the lamp to decide whether using 12V or 3.3V power. (Figure 9, location of “WK” lead for the grounding of lamp or buzzer) Version 1.0 March 14, 2008 www.plxdevices.
PAGE 5
Users Guide: iMFD Sensor Module Recommended Accessory: (Figure 10) DM-5 Fluid Pressure 52mm Gauge. Ideal for affordable Fluid Pressure monitoring from your SM-FluidPressure. Release date will be updated. Included Items: 1. 2. 3. 4. 5. 6. 7. SM-FluidPressure main unit 4ft red power wire 4ft black ground wire 4ft gray analog output wire 2.1mm power connector Resistive type fluid pressure sensor (Additional sensor sold separately) 24k gold ring terminal 8. 9. 10. 11. 12. 13.
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Users Guide: iMFD Sensor Module LIMITED WARRANTY PLX Devices Inc. warrants this product to be free from defects for 1 year from the date of purchase. If applicable, Oxygen sensors and other non-serviceable items are excluded from stated warranty. Serviceable goods must be determined by PLX Devices to be defective before any warranty or replacement is issued. PLX Devices’ obligation under warranty shall be limited to repairing or replacing, under the discretion of PLX Devices, any part proven defective.