Ecu-To-Sensor Connection - HID Lumidigm M Series Mechanical Integration Manual

3.6 ECU-to-Sensor Connection

The M3xx is shipped as three separate components: the ECU, the sensor head, and the
connecting flex cable. Care must be taken to assemble the unit correctly to avoid damage
to the components. Figure 15 shows the proper installation orientation for the flex cable.
Care should be taken to avoid creating a crease in the flex cable, or excessively bending
the cable during handling or as a result of the mounting strategy used.
Figure 15: Flex cable installation
If the cable is not secured, it is possible for the cable to rotate with respect to the
connector. In this event, power events can disrupt the calibration data or ultimately cause a
hardware failure in the sensor head.
We recommend using hot glue to secure the flex cable to the connector. When assembling,
(1) place components in final assembly positions in the enclosure; (2) visually verify that the
flex cable is fully seated in the connector and not rotated as shown in Figure 16a; and (3)
apply hot glue to the flex cable / connector interface so that movement or loads on the flex
cable will not lead to cable rotation (Figure 16c).
Warning: Do not glue the black flip-up bail (locking tab) as shown in Figure 16b.
Figure 16: Securing the flex cable
The black flip-up bail should be locked in place by applying equal pressure on both sides.
Operator training is imperative to get a consistent clamping pressure.
Page 19 of 28
Lumidigm M-Series M3xx Modules Mechanical Integration Guide, PLT-02217, Rev. A.0
December 2014