Lenze E94APNExxx4 - Manual (Page 53)

Wiring the device
Wiring
Design of the cables
5
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53 EDK94PNE245 DE/EN/FR/ES/IT 2.0
5.3.2 Design of the cables
ƒ The cables used must comply with the approvals required for the location (e.g. UL).
ƒ It is imperative to comply with the regulations concerning minimum cross−sections
of PE conductors. The cross−section of the PE conductor must be at least as large as
the cross−section of the power connections.
ƒ The effectiveness of a shielded cable is reached by:
– Providing a good shield connection through large−surface shield contact.
– Using only braided shields with low shield resistance made of tin−plated or
nickel−plated copper braid.
– Using braided shields with an overlap rate > 70 % and an overlap angle of 90 °.
– Keeping unshielded cable ends as short as possible.
Use system cables or shielded cables for these connections:
ƒ External brake resistor (
, Mounting Instructions of the brake resistor)
The following connections need not be shielded:
ƒ Mains
ƒ 24 V supply
ƒ Digital signals (inputs and outputs)