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Sensor and IOLM Mounting

Since the devices being used in the operational environment are subject to normal industrial conditions they need to be properly installed and affixed to mechanically stable surfaces to avoid damage to the devices and cabling.

IO-Link master mounting

IOLMs are provided with two through-hole screw-down points at the top and bottom of the device; anchor the IOLM via these and appropriate bolts with lock-nuts to avoid loosening due to vibration.  Although the IOLM is IP-rated for immersion and dust infiltration protection it is best mounted in a protective enclosure; this is particularly important if any of the contaminants it is exposed to are electrically conductive.
Note:   All ports on the device which do not have a cable terminating on them must be capped with a suitable port protective cap like the following https://www.ifm.com/ca/en/product/E73004
 

Sensor mounting

Sensor mounting needs to take into account the type of transducer being used and the recommendations from the manufacturer’s usage documentation.  Most industrial sensors are mountable through one of three approaches: through-hold screw-down mounts on the sensor’s hardpoints (these are generally motion, vibration, orientation, infrared, etc. type devices); threaded fittings designed to screw into a port on industrial equipment (normally these are pressure, liquid level, temperature, etc. devices) and the use of sealing tape should only be done where recommended); and externally clamped devices (essentially barrel shaped sensors where the mount is clamping the sensor to the part being measured, temperature and capacitive sensors are two type which fall into this grouping).
Selection of a mounting point needs to make the physical attachment of the sensor as close to the machine element being measured (e.g. cooling water outlet pipe face) to provide the most accurate reading and minimize reading inaccuracy and hysteresis. Secondary criteria to the positioning of the sensor is meeting orientation requirements (i.e. some sensors have internal elements which require vertical or horizontal orientation and not oblique ones, esp. those with vibrating or rotating parts); orientation also covers the sensor’s connection cable which needs protection from abrasion and excessive flexion.
Cable length should also be considered in the positioning of sensors, although the cables are balanced (electrically constructed to avoid stray signal pickup) the shorter a run the less attenuation and signal degradation (e.g. slew).

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