PLX Devices SM-FT - Manual (Page 2)

Users Guide: iMFD Sensor Module
Version 1.0 January 24, 2007
www.plxdevices.com
(408)745-7591
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 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-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 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-FluidTemp 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.
(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.