Installation and Connection
Grounding
The housing must be carefully grounded. Connect a ground cable
(protective earth, 4 to 6 mm
2
[AWG 11‒9], tightening torque 1.7 Nm
[15 lb⋅in]) to the housing, using the screw that is marked with the ground
symbol (at the rear side of the device).
Moreover, the power supply card needs a separate ground connection
(functional earth, min. 2.5 mm
2
[≤ AWG 13], tightening torque 0,56 ‒
0,79 Nm [5‒7 lb⋅in]). See the “Terminal Marking” diagram in Section “DI-4
X – Power Supply and Digital Inputs” to check for the correct terminal.
All grounding connections (i. e. protective and functional earth) must be
low-inductance, i. e. as short as possible, and national standards – if
applicable – must be followed.
The devices are very sensitive to electro-static discharges.
34 MCDGV4 DOK-HB-MCDGV4-2E
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