Lenze 8400 - Manual (Page 209)

Electrical installation
Common control terminals
Important notes
6

209 EDS84ASC552 EN 9.1
6.6 Common control terminals
6.6.1 Important notes

Stop!
The device contains components that can be destroyed by electrostatic
discharge!
Before working on the device, the personnel must ensure that they are free of
electrostatic charge by using appropriate measures.

Note!
If the terminal X106 is used, e.g. to connect an external PTC thermistor or a
thermal contact, ensure at least one basic insulation to the motor or mains
potential to not restrict the protective separation of the control terminals.
Design of the cables
ƒ The cables used must comply with the approvals required for the location (e.g. UL).
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.
These terminals must be shielded:
ƒ
Feedback systems
ƒ Analog signals (inputs and outputs; single-sided shield connection to the controller)
ƒ System bus (CANopen)

Note!
Always ensure shielded wiring for edge-controlled digital input signals (quick
inputs or touch probe).
The following connections need not be shielded:
ƒ 24-V supply
ƒ
Digital signals (inputs and outputs).
– We recommend to use shielded cables for a cable length from approximately 5 m
on or in environments with strong interferences.