Emerson Machinery Health PR 642 Series, Installation Manual

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Figure 4-7: Mounting example PR 6426
4.4 Wiring hints
This section contains general information and wiring hints regarding the sensor cable
installation. The necessary measures for the proper cable installation depend always on
the situation on-site. Observe the following points for a reliable cable installation:
• Do not bend or twist the sensor cables. Cables and connectors must be movable when
the sensor is adjusted in its holder.
• Install the cable strain-free and spin-free such that it is protected against mechanical
damages.
• Do not shorten the sensor cable or the extension cable of PR 6422 and PR 6423. Rollup
the excess cable (rolling diameter ≥100 mm).
• Ensure that no parts of the cable, including the adapter plug, touch any rotating parts
of the machine.
• Note that machines can expand or shrink due to temperature influences. Always install
the sensor cable with a cable length reserve to compensate for the thermal behavior of
the machine.
• Only install cables with a minimum bending radius of 25 mm. For sensor cables with
metal protection tubes, the minimum bending radius is 35 mm.
• Avoid oil stream areas for sensor cableways. Be sure that no oil stream or other
agitations will permanently move the cable.
• Avoid sensor cableways where the cable is permanently submerged into oil.
• Affix the sensor cable at recurring short distances.
Installation and Mounting Installation Guide
January 2020 MHM-97857
20 MHM-97857, Rev 1.5