ABB C310/0020/STD Analog module industrial system controller

Description

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See STO control unit connections in Connecting the control unit on page 85.
The following diagrams present examples of Safe torque off wiring for
• a single drive unit (page 144)
• multiple drive units (page 145)
• multiple drive units when an external 24 V DC power supply is used (page 146).
 Activation switch
In the wiring diagrams below, the activation switch has the designation [K]. This
represents a component such as a manually operated switch, an emergency stop
push button switch, or the contacts of a safety relay or safety PLC.
• If a manually operated activation switch is used, the switch must be of a type that
can be locked out to the open position.
• The contacts of the switch or relay must open/close within 200 ms of each other.
• An FSO-xx safety functions module can also be used. For more information, see
the FSO-xx module documentation.
 Cable types and lengths
• Double-shielded twisted-pair cable is recommended.
• Maximum cable lengths:
• 30 m (100 ft) between activation switch [K] and drive control unit
• 60 m (200 ft) between multiple drive units
• 60 m (200 ft) between external power supply and first drive unit
Note: The voltage at the INx terminals of each drive control unit must be at least 17 V
DC to be interpreted as “1”.
 Grounding of protective shields
• Ground the shield in the cabling between the activation switch and the control unit
at the control unit.
• Ground the shield in the cabling between two control units at one control unit only