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Electrical installation

Common control terminals

Important notes

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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 c ables 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 m ade of tin-plated or

nickel-plated c opper 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.

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Lenze 8400 Manuel d'utilisateur Page 209