Safety Instructions For Sensor Modules And Encoders - Siemens SINAMICS S120 Manual

Encoder system connection

9.3 Safety instructions for Sensor Modules and encoders

Encoder systems
Absolute encoder SSI
Temperature evaluation
Only possible for SSI encoders with a 5 V supply
1)
Possible for SSI encoders with a 5 V or 24 V supply
2)
With specified 6FX8002-2CA88 adapter cable
3)
9.3 Safety instructions for Sensor Modules and encoders
NOTICE
Devices damaged by disconnecting/connecting encoder lines during operation
Disconnecting or connecting plug-in connections during operation can damage devices or
cause malfunctions.
• Only disconnect or connect the encoder cables to Siemens motors in a voltage-free state if
NOTICE
Damage when connecting an impermissible number of encoder systems
If more than the maximum permissible number of encoder systems are connected to a Sensor
Module, this will cause damage.
• At a Sensor Module only connect the maximum permissible number of encoder systems.
Note
Encoder failures due to encoder signal disturbances
Unfavorable material combinations generate static electricity between the belt pulley and the
belt. This electrostatic charge (several kV) can discharge via the motor shaft and the encoder,
which results in disturbance of the encoder signals (encoder error).
• Use an antistatic version of the belt (special conductive polyurethane mixture).
232
SMC10 SMC20
-
Yes
hot-plugging has not been specifically released. When using direct measuring systems
(third-party encoders), ask the manufacturer whether it is permissible to disconnect/
connect under voltage.
– Sensor Modules SMC10, SMC20 and SMC30: Single-encoder system
– Sensor Module SMC40: Two-encoder systems
– Sensor Modules SMEx: Single-encoder system
SMC
SMC30 SMC40
Yes Yes -
1) 2)
Yes Yes -
SME
SME20 SME25 SME120
- Yes
1)
Yes -
3)
(protec‐
tive elec‐
separa‐
Control Units and additional system components
Equipment Manual, 06/2020, 6SL3097-5AH00-0BP2
SME125
- Yes
1)
Yes Yes
(protec‐
tive elec‐
trical trical
separa‐
tion) tion)