Replacing Sensor Module - Emerson MRLDS-450 Installation And Operation Manual

Figure 5-3 - IP66 Sensor Configuration
IP66 Product arrangement shown for reference; Remote Daughterboard PCB shown
(used for Remote IP66 Sensor Configurations). Note: Cable Glands and labeling are
factory installed.

5.3.1. Replacing Sensor Module

CAUTION! This product uses semiconductors that can be damaged by electrostatic
discharge (ESD). When handling the PCB, care must be taken so that electronics are not
damaged.
To replace the gas detector's sensor module:
1. Power-down the gas detector.
2. Using a 5/32" (4mm) hex key/allen wrench (not included), remove the lid and 
disconnect the ribbon cable from the sensor module.
3. Remove installed sensor module from the lid by holding onto the housing and turning
counter-clockwise 90°. Take care not to apply excessive force to the sensor module's
circuit board. When the square tab of the sensor housing is aligned with the lock icon,
firmly pull the module to remove it from the housing.
32 • MRLDS-450 Refrigerant Gas Detection I&O Manual
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026-1316 Rev 0