Encoder system connection
10.1 Sensor Module Cabinet-Mounted SMC20
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7
229
Damage to motor in the event of incorrectly connected KTY temperature sensor
If a KTY temperature sensor is connected with incorrect polarity, then 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.
Data regarding the parameterization of the KTY temperature sensor can be taken from the
following reference:
References: SINAMICS S120 Function Manual Drive Functions, Chapter "Monitoring and
protective functions/thermal motor protection"
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.
• Use temperature sensors that comply with the specifications relating to protective
separation.
• If safe electrical separation cannot be guaranteed (for linear motors or third-party
motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal
Module TM120.
X524 Electronics power supply
Table 10- 3 X524: Electronics power supply
Voltage: 24 V (20.4 … 28.8 V)
Current consumption: Maximum 0.35 A
Maximum current through the jumper in the
connector: 20 A (15 A according to UL/CSA)
M Electronics ground
Type: Screw terminal 3 (Page 288)
The maximum cable length that can be connected is 30 m.
Note
The two "+" and "M" terminals are jumpered in the connector. This ensures that the su
pply
voltage is looped through.
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