Siemens SINAMICS MV, Function Manual

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Preparing for use
4
4.1 Wiring for cable lengths exceeding 30 m
Cable type
• Shielded cable, Sabix D345 4x2x0.5mm²
• Capacitance per unit length: 30 nF/km
• SAB Bröckskes, Siemens article number 1010084
Cable length
As a result of possible capacitances that may occur due to the cable installation, we recommend
limiting the cable length as follows:
• Removal of the triggering device for the safety relay: 100 m
• Removal of the safety relay for the PSA: 100 m
The data on maximum cable length can be found in the data sheet/application manual of the
safety relay. You will find further information in the Industry Mall (
https://
support.industry.siemens.com/cs/ww/en/view/91198365 ).
Wiring
1. Connect the cable shield at both ends in the controller cabinet and the converter cabinet.
Install the cable in a protected duct.
2. Connect the shield between the safety relay and PSA to a suitable point in the cabinet
connection area (customer terminals). The internal cabinet wiring is implemented in the
factory.
The maximum permissible cable length between the safety relay and the PSA results from the
specification in the data sheet of the safety relay.
When calculating the cable length, take into consideration the input capacitance of the
relevant switch-off signal path with approx. 40 nF.
Two-channel firing pulse inhibit
Function Manual, 07/2021, A5E51227986A
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