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Note
Use in zones 2 and 22
In normal operation, non-arcing resources for zones 2 and 22 may not be connected or
disconnected under voltage.
However, the positioners can be connected and disconnected under voltage when installing
or repairing; refer to the certificate or the manufacturer's declaration for zones 2 and 22.
Note
Installing the optional modules
Install the essential optional modules before connecting the positioner electrically.
Transmission ratio selector
Before closing the module cover of the positioner, check whether the transmission ratio
selector has been set correctly.
Note
Owing the reasons pertaining to tightness (IP enclosure rating) and the required tensile
strength, only use the cables having a diameter ≥ 8 mm for standard M20x1.5 cable gland,
or use a suitable seal insert in case of smaller diameters.
In the NPT version, the positioner is delivered with a coupling. When inserting a counter
piece in the coupling, ensure that the maximum permissible torque of 10 Nm is not
exceeded.
6.1.3
Interference immunity
If the bus shield is fully effective, the interference immunity and the interference emission
conform to the specifications. The following measures ensure that the bus shield is fully
effective:
● The shields have been connected to the metallic connections of the positioner.
● The shields have been laid up to the terminal boxes, the distributor and the transceiver.
SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07
NOTICE
Dissipation of glitch impulses/equipotential bonding
In order to dissipate glitch impulses, the positioner must be connected to a potential
equalizing cable (earth potential) using a low resistance. The positioner in the plastic
enclosure is therefore equipped with an additional cable. Connect the this cable to the
shield of the bus cable and the potential equalizing cable using a cable clamp.
Devices in the metal enclosure have a corresponding terminal on the outer side of the
enclosure. This terminal must also be connected to the potential equalizing cable.
For applications in hazardous areas, ensure an adequately suitable equipotential
bonding between the hazardous and non-hazardous areas.
Connect
6.1 Connect electrically
75
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