Safety Instructions For Terminal Modules - Siemens SINAMICS S120 Manual

Terminal Modules

6.2 Safety instructions for Terminal Modules

6.2 Safety instructions for Terminal Modules
NOTICE
Device failure as a result of unshielded or incorrectly routed cables to temperature
sensors
Unshielded or incorrectly laid cables to the temperature sensors can cause induced voltages
from the power side to the signal-processing electronics. This can result in significant
disturbance of all signals (fault messages) up to failure of individual components (destruction
of the devices).
• Only use shielded cables as temperature sensor cables.
• If temperature sensor cables are routed together with the motor cable, use separately
• Connect the cable shield at both ends to ground potential through a large surface area.
• Recommendation: Use suitable MOTION-CONNECT cables.
NOTICE
Damage through use of incorrect DRIVE-CLiQ cables
The use of incorrect or unreleased DRIVE-CLiQ cables can cause damage or functional faults to
devices or the system.
• Only use suitable DRIVE-CLiQ cables that have been released by Siemens for the particular
Note
Malfunctions due to polluted DRIVE-CLiQ interfaces
Malfunctions can occur in the system through the use of polluted DRIVE-CLiQ interfaces.
• Cover unused DRIVE-CLiQ interfaces with the supplied blanking covers.
Note
Malfunction in the switched-off state due to diagnostic currents
Unlike mechanical switching contacts, e.g. emergency stop switches, diagnostic currents can
also flow when the semiconductor is in the switched-off state (logical state "0" or "OFF"). If
interconnection with digital inputs is faulty, the diagnostic currents can result in incorrect
switching states. Incorrect signal states of digital inputs can cause unwanted motions of
machine parts and trigger malfunctions.
• Observe the conditions of digital inputs and digital outputs specified in the relevant
manufacturer documentation.
• Check the conditions of the digital inputs and digital outputs with regard to currents in the
"OFF" state and if necessary connect the digital inputs to suitably dimensioned, external
resistors to protect against the reference potential of the digital inputs.
116
shielded cables twisted in pairs.
application.
Control Units and additional system components
Equipment Manual, 06/2020, 6SL3097-5AH00-0BP2