PI M-687.UN User Manual page 21

5 Installation
There is an M4 hole in the M-687.UN for connecting the protective earth. This hole is marked
with the symbol for the protective earth conductor
product view (p. 9).
Figure 2:
Requirements
 You have read and understood the general notes on installing (p. 15).
 The M-687.UN is not connected to the controller.
Tools and accessories
Suitable protective earth conductor: Cross-sectional area of the cable ≥0.75 mm

M4 screw set supplied for connecting the protective earth conductor (p. 10)

Suitable screwdriver

Connecting the M-687.UN 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 M-687.UN 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.
M-687.UN XY Stage
Connecting the protective earth conductor (profile view)
1 Lower platform of the M-687.UN
2 Flat washer
3 Lock washer
4 Screw
5 Cable lug
6 Protective earth conductor
. The position of the hole is shown in the
MP100E Version: 1.3.0
2
17