Installation According To Emc (Installation Of A Ce−Typical Drive System); Shielding - Lenze 8400 protec Hardware Manual

7 Electrical installation − EMS version
Installation according to EMC (installation of a CE−typical drive system)

Shielding

7.4 Installation according to EMC (installation of a CE−typical drive system)
Design of the cables
It is imperative to comply with the regulations concerning minimum cross−sections
ƒ
of PE conductors. The cross−section of the PE conductor must be at least as large as
the cross−section of the power connections.
The cables used must comply with the approvals required for the location (e.g. UL).
ƒ
7.4.1 Shielding
Requirements
The effectiveness of a shielded cable is reached by:
ƒ
– 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:
Motor
ƒ
External brake resistor (, Mounting Instructions of the brake resistor)
ƒ
Motor holding brake (shielding is required when being integrated into the motor
ƒ
cable; connection to optional motor brake control)
Motor temperature monitoring
ƒ
Fieldbus communication (e.g. CANopen)
ƒ
Serial interfaces (e.g. SSI, RS485/422)
ƒ
The following connections need not be shielded:
Mains
ƒ
24 V supply for motor holding brakes
ƒ
Digital signals (inputs and outputs). From a cable length of approx. 5 m onwards, we
ƒ
recommend to use shielded cables.
Connection system
Directly apply the shielding in the plug.
ƒ
– Extensively apply the shielding and ensure electrical conductivity.
– If required, additionally connect the shield to the cable clamp rail.
112
l
EDS84DPS424 EN 5.0