PLX Devices SM-AIT User Manual

Imfd sensor module sm-ait

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Users Guide: iMFD Sensor Module

Version 1.0 July 11, 2007


Version 1.0 July 11, 2007

www.plxdevices.com

(408)745-7591

iMFD Sensor Module SM-AIT

*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)

1. Connects to 12V-18V power source.
2. Analog outputs (3.3V, 0-5V analog output, ground)
3. Termination jumper. Closed for first SM in daisy chain.
4. Connects to next SM in daisy chain or to first DM
5. Connects to previous SM or unconnected if first SM in daisy chain
6. Connects to AIT probe K-Type Thermocouple

Install the Exhaust Gas Temperature Sensor:

1. The PLX AIT K Type thermo coupler probe screws into a 1/8 NPT tap.
2. Mate the AIT probe with the SM-AIT module where indicated K-Type T.C.

Connecting Power to the Unit:

CAUTION! CONNECTING THE SM-AIT IN REVERSE POLARITY WILL

DAMAGE THE UNIT! CHECK CONNECTIONS BEFORE POWERING ON.

1. The SM-AIT 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-AIT 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

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