Siemens PROFIBUS PA SIPART PS2 Manual page 58

Preparing for Operation
!
Figure 3-12 Base plate
Fitting the bus cable
Normal, intrinsically safe and zone 2 ver-
sions.
1. Isolate the bus cable as shown in figure
3-13, page 57.
2. Open the positioner housing by undoing
the four cover screws.
3. Insert the prepared bus cable through the
cable gland.
4. Secure the shield with the cable clip and
the two screws to the housing.
56
CAUTION
To discharge impulses under fault conditions, the positioner must be
connected via a low resistance to an equipotential bonding (ground
potential). For this the positioner in plastic housing is provided with an
additional cable. Connect this cable using the cable clip to the PROFI-
BUS--PA cable shield and to the equipotential bonding.
Devices in metal housings have a corresponding terminal on the out-
side of the housing, which also must be connected to equipotential
bonding.
Provide for suitable potential equibonding between the hazardous and
non-hazardous areas for applications in areas where there is a risk of
explosions.
Explosion--proof version
1. Isolate the bus cable as shown in figure
3-13, page 57.
2. To open the positioner, the cover catch
(12) must be undone and the screw cover
unscrewed.
3. Insert the prepared bus cable through the
Ex--d--certified cable gland *)
4. Secure the shield with the cable clip and
the two screws to the housing.
Shield
SIPART PS2 PA Manual
A5E00127926-03