5 Installation
P-5x7/P-5x8 Positioners
PZ82E
Version: 3.2.0
19
INFORMATION
In the case of P-5x7/P-5x8 positioners with D-sub connectors, ground loops can occur when the
positioner is grounded via its protective earth connector as well as via the connecting cable's
shielding for the electronics.
If a ground loop occurs, contact our customer service department (p. 35).
The P-5x7/P-5x8 has an M4 hole for connecting the protective earth conductor. This hole is
marked with the symbol for the protective earth conductor . Refer to "Dimensions" (p. 42)
for the exact position of the hole.
Requirements
You have read and understood the general notes on installing (p. 17).
The P-5x7/P-5x8 is
not
connected to the electronics.
Tools and accessories
Suitable protectiv
e earth conductor: Cable cross section ≥0.75
mm
2
M4 protective earth screw set (p. 11) supplied for connecting the protective earth
conductor
Suitable screwdriver
Figure 3: Connecting the protective earth conductor (profile view)
1
Base body of the P-5x7/P-5x8
2
Flat washer
3
Lock washer
4
Screw
5
Cable lug
6
Protective earth conductor
Connecting the P-5x7/P-5x8 to the protective earth conductor
1.
If necessary, attach a suitable cable lug to the protective earth conductor.
2.
Use the M4 screw (together with the flat and lock washers) to attach the cable lug of
the protective earth conductor to the threaded hole in the P-5x7/P-5x8 as shown in the
profile view.
3.
Tighten the M4 screw with a torque of 1.2 Nm to 1.5 Nm.
4.
Make sure that the contact resistance at all connection points relevant for connecting
the protective earth conductor is <0.1
Ω
at 25 A.
