Wiring RIA14
32 Endress+Hauser
4.2 Electrical connection
Both the terminal assignment and the connection values of the field display unit correspond to
those of the Ex-version. The device is only designed for operation in a 4 - 20 mA measuring
circuit. There must be potential equalisation along the circuits (within and outside the hazardous
area).
4.3 Degree of protection
The devices fulfil all the requirements for IP 67 degree of protection. Compliance with the
following points is mandatory following installation or servicing in order to ensure that IP 67
protection is maintained:
• The housing seal must be clean and undamaged when inserted into the seal groove. The seal
may have to be cleaned, dried or replaced.
• The cables used for connection must be of the correct specified outside diameter (e.g. M20 x
1.5, cable diameter from 8 to 12 mm).
The cables must loop down before they enter the cable entries (→ å 8).
This arrangement prevents moisture penetrating the entry. Install the device so that the cable
entries are not facing upwards.
• Replace any unused cable entries with dummy plugs (contained in the scope of delivery).
• The grommet used should not be removed from the cable entry.
• The housing cover and the cable entry must be well tightened.
a0011260
Fig. 8: Connection instructions to retain IP67 protection
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