Danfoss VLT Safety Option MCB 150 Installation Manual page 42

Installation Guide | VLT® Safety Option MCB 150/151
Output
Use separate multicore cable for supply voltages to avoid short circuits between the cable from the output (S37) to the 24 V DC supply
line.
As a result of short circuits, it is no longer possible to switch off the drive terminal 37.
Control cables must be shielded/armored.
See the chapter Grounding of Shielded Control Cables in the VLT AutomationDrive FC 302 Design Guide for detailed specifications.
Only shielded cables are suitable for connecting encoders.
All signals to the safety option must be PELV supplied and comply with EN IEC 60204.
• Route sensitive control cables - such as encoder and active safety component cables - without any interruption and with optimum
shield support at both ends.
• Connect shields at both ends to the grounded enclosures through a good electrical connection and through a large surface area.
• Connect cable shields a close as possible to the cabinet cable entry.
• If possible, intermediate terminals should not interrupt cable shields.
• Retain cable shields for both power cables and for signal and data cables using the appropriate EMC clamps. The shield clamps
must connect the shield to the EMC shield bar of the shield support element for control cables through a low inductive connection
through a large surface area.
42 | Danfoss A/S © 2018.09
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Installation
AQ279747441421en-000101 / 130R0292