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6.6 Laying the signal lines

Malfunction due to common cable installation

Malfunctions can occur in the converter if cables with differing voltage levels are laid together

with internal cables in one cable duct in the cabinet.

● Do not run cables coming from the outside, for example to the terminal strips, together with

internal cables in one cable duct.

Ensure that the following instructions are complied with:

● All signal lines must be shielded. The cable shield should be braided, because cables

shielded by tape or foil are five times less efficiently protected against interference. Always

ground the cable shields at both ends. Contacting at one end is advantageous in

exceptional cases only.

● Clamp the shield of incoming analog and binary cables to the shield busbar at the entry point

into the cabinet. Continue running the cable, still shielded, to the terminal strip or board. No

shields are connected to the terminal strips or boards.

● Serial connecting cables must be shielded. Place the shield on the metallic connector

housing. Also connect the shield to the shield rail. Do not connect the cable shield to a

ground pin of the connector.

● The connector housing and front plate of the boards do not provide adequate cable

shielding. Connect the cable shields at both ends to the shield rails in the cabinets. Always

use shielded analog signal cables, regardless of whether they are installed inside or outside

cabinets. In order to increase the effectiveness of the shielding, ground spare conductors at

both ends.

You should only use the pre-assembled cable sets supplied. These cable sets are marked at

both cable ends with the precise designation of the connection point at which you must connect

or plug in the cable.

Note

For more information, see the interconnection diagram in the circuit manual.

Please proceed as follows:

1. Connect the signal and power supply cables.

2. Connect the shield and secure the cable. You can find further information on this in the

“Electromagnetic compatibility" section.

3. Seal the cable routing according to the degree of protection required.

Siemens SINAMICS PERFECT HARMONY GH150 User Manual

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