PLX Devices SM-FP - Manual (Page 2)

Users Guide: iMFD Sensor Module
Version 1.0 March 14, 2008
www.plxdevices.com
(408)745-7591
(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.
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-FluidPressure 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 plastic 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-FluidPressure is the only sensor module or last sensor module in the iMFD chain, be sure to have the termination
jumper installed. Otherwise, remove the jumper. Please refer to (Figure 1) for the location of the termination jumper.