Siemens SINAMICS S120 Manual page 138

Line Modules
5.2 Basic Line Modules
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.
NOTICE
Damage to motor in the event of incorrectly connected KTY temperature sensor
If a KTY temperature sensor is connected with incorrect polarity, it is not possible to detect
when the motor overheats. Overheating can cause damage to the motor.
• Connect a KTY temperature sensor with the correct polarity.
Note
The temperature sensor connection can be used for motors that are equipped with a KTY84-
1C130, PT1000 or PTC measuring sensor in the stator windings.
Note
Connection to terminals 1 and 2
For operation, 24 VDC must be connected to terminal 2 and ground to terminal 1. Pulse
suppression is activated when removed.
136
WARNING
isolation.
motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal
Module TM120.
shielded cables twisted in pairs.
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3