Siemens SINAMICS S120 Equipment Manual page 203

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.
NOTICE
Looping the circuit breaker into the EP terminal circuit for infeed units capable of energy
recovery
If the upstream circuit breakers are not controlled from the SINAMICS drive group in the
case of infeed units capable of energy recovery, then this can have a damaging reaction on
the section that has been shut down when the circuit breaker is opened. As a
consequence, under certain circumstances, the components connected in the line supply
section involved could be damaged as a result of overvoltage.
• If, for infeed units capable of energy recovery, the upstream circuit breaker is not
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.
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9
shielded cables twisted in pairs.
controlled from the SINAMICS drive group, then an auxiliary contact of the circuit
breaker should be looped into the circuit associated with the EP terminals.
Line Modules
5.4 Active Line Modules
201