Cable types and lengths
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Double-shielded twisted-pair cable is recommended.
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Maximum cable lengths:
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30 m (100 ft) between activation switch [K] and inverter control unit.
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60 m (200 ft) between multiple inverter units
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60 m (200 ft) between external power supply and first inverter unit
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With frame n×R8i inverter units: 30 m (100 ft) between BCU control unit and last
inverter module in the chain.
Note: The voltage at the INx terminals of each inverter control unit (or frame R8i inverter
module) must be at least 17 V DC to be interpreted as "1".
Grounding of protective shields
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Ground the shield in the cabling between the activation switch and the control unit at
the control unit.
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Ground the shield in the cabling between two control units at one control unit only.
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For frame R8i and multiples: Do not ground the shield in the cabling between BCU and
R8i module, or between R8i modules.
The Safe torque off function 311