Siemens SINAMICS S120 Manual page 140

Cabinet Modules
6.1 Basic Line Connection Modules
Danger to life due to 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 safety
• If safe electrical separation cannot be guaranteed (for linear motors or third-party
NOTICE
Device failure as a result of 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 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 to ground potential through 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
24 VDC must be present at terminal 2 and ground at terminal 1 for operation. Pulse
suppression is activated when removed.
140
WARNING
isolation.
motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal
Module TM120.
shielded cables twisted in pairs.
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A