PI L-412 9025E1 Series User Manual page 19

6 INSTALLATION
DANGER
Risk of electric shock if the protective earth conductor is not connected!
If the protective earth conductor is missing or not properly connected, risk of dangerous
touch voltages on the L-412.xx9025E1 in the event of malfunction or failure of the system. If
there are touch voltages, touching the L-412.xx9025E1 leads to serious injuries or death by
electric shock.
► Connect the L-412.xx9025E1 to a protective earth conductor before startup.
► Do not remove the protective earth conductor during operation.
► If the protective earth conductor has to be removed temporarily (e.g., for modifications),
reconnect the L-412.xx9025E1 to the protective earth conductor before restarting.
Information
► Pay attention to the applicable standards for connecting the protective earth conductor.
Overview
Figure 8: Protective earth connector on the L-412.xx9025E1
1. Protective earth connector on the L-412.xx9025E1 indicated by the protective earth symbol
2. Lock washer
3. Flat washer
4. Cable lug of the protective earth conductor
5. Screw, M4×8 ISO 7045
Tools and Accessories
■ Suitable protective earth conductor:
■ Cable cross section ≥ 0.75 mm
■ Contact resistance <0.1 Ω at 25 A at all points relevant for attaching the protective earth
conductor
■ Suitable screwdriver
■ Optional: Suitable aid (e.g., liquid adhesive) for securing the screw connection
Requirements
You have read and understood the
✓
Connecting the L-412.xx9025E1's Base Body to the Protective Earth Conductor
1. If necessary, attach a suitable cable lug to the protective earth conductor.
2. Attach the cable lug of the protective earth conductor to the protective earth connector of
the L-412.xx9025E1 as shown in the illustration.
3. Tighten the screw with a torque of 1.2 Nm to 1.5 Nm.
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L412UM0002EN ‒ 10/24/2022
2
general safety instructions (p. 8).
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