Installation, Operating and Maintenance
7/8
Instructions for Jola external-mounting limit switches
RK 1/K/…/Variant ./Ex-..
21.04.2018
6.
Connection
Connect the
contact of the external-mounting limit switch
RK 1/K/…/Variant ./Ex-..
as shown in the circuit diagram in the supplied product documentation.
If intrinsically safe contact protection relays are used, connect the external-
mounting limit switch RK 1/K/…/Variant ./Ex-.. in line with the instructions
contained in the corresponding production description.
Potential equalisation is necessary with:
the external-
mounting limit switch RK 1/K/…/Variant ./Ex-..
and
the metal accessories and the accessories made of antistatic electrically
conductive plastic.
Connection to the potential equalisation system is essential for safe operation
and must never be neglected.
You must also always ensure that you are connecting to the potential equalisation
system and not to a potential earth.
7.
Start-up
Prior to start-up, you must re-check the mounting position, the mechanical
fastening and the electrical connection.
In particular, you must check once again that the unit is also connected to the
corresponding, admissible intrinsically safe circuit (see point 2).
In addition, you must also check and verify that there is no possibility
whatsoever of hazardous conditions occurring due to non-adherence to any of
the relevant instructions, standards or official regulations.
Only then may the unit in question be started up electrically.
The entire installation set-up must always comply with the standard
IEC/EN 60 079-14 resp. the replacing standard.
Connect the green-yellow conductor or the non-insulated conductor of
the cable (depending of the type of cable) of
the external-
mounting limit switch RK 1/K/…/Variant ./Ex-..
to the potential equalisation system.
The horizontal metallic shaft and all other accessories made of metal or
made of electrically conductive plastic material have as well to be
connected to the potential equalisation system.
