Siemens SINAMICS S120 System Manual page 153

Risk of death from electric shock in the event of voltage flashovers at the temperature
sensor
Voltage flashovers in the signal electronics can occur in motors without safe electrical
separation of the temperature sensors.
• Only use temperature sensors that fully comply with the specifications of the electrical
• If safe electrical separation cannot be guaranteed (for linear motors or third-party
NOTICE
Device failure due to unshielded or incorrectly routed cables to temperature sensors
Unshielded or incorrectly routed cables to temperature sensors can result in interference
being coupled into the signal processing electronics from the power side. This can
significantly disturb 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 twisted-pair,
• Connect the cable shield at both ends to ground potential over a large surface area.
• Recommendation: Use suitable Motion Connect cables.
NOTICE
Risk of motor overheating due to incorrectly connected KTY temperature sensor
A KTY temperature sensor connected with incorrect polarity cannot detect if the motor
overheats.
• Make sure that you connect the KTY temperature sensor with the correct polarity.
Note
The temperature sensor connection can be used for motors that are equipped with a KTY84-
1C130 or PTC probe in the stator windings.
Note
Connection to terminals 1 and 2
For operation, 24 V DC must be connected to terminal 2 and ground to terminal 1. Pulse
suppression is activated when terminals are disconnected.
Grid infeed
System Manual, 04/2015, A5E03347436A
8.4 Air-cooled Active Line Modules for the grid infeed, chassis format
WARNING
separation.
motors, for example), use a Sensor Module External (SME120 or SME125) or a
Terminal Module TM120.
separately-shielded cables.
Device overview
153