Earthing - ABB PFEA 113 User Manual

2.4.3 Earthing

3BSE029382R0101 Rev C
For trouble free operation, the earthing must be properly done. Note the following:
• If the free (unscreened) length exceeds 0.1 m (4 in.) the individual pairs of power
and signal conductors must be twisted separately
• The external protective earth (PE) cable must be attached to one of the earthbar screw
clamps.
• All the cable screens have to be connected to the earth bar and the length of the screen
connection must be less than 50 mm (2 in.).
The cable screens must be earthed at one end only.
• Since the signal earth of the measurement system is connected to the chassis earth of
the tension electronics, the input of a superior system connected to the control system
must not be earthed. The best ways of interconnecting the measurement system and a
superior system to achieve optimal function are shown in
Figure 2-6. Connection to a superior system with an insulated or differential input
Figure 2-7. Connection to a superior system through a separate insulation amplifier
Tension Electronics PFEA113, User Manual
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Section 2.4.3 Earthing
Figure 2-6 and Figure 2-7.
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