Operating instructions

Electrical installation
4.9 Other connections
Drive converter cabinet units
106 Operating Instructions, 10/2008, A5E00288214A
4.9.19 SMC30 Sensor Module Cabinet-Mounted (option K50)
4.9.19.1 Description
The SMC30 Sensor Module is used for determining the actual motor speed. The signals
emitted by the rotary pulse encoder are converted here and made available to the closed-
loop controller via the DRIVE-CLiQ interface for evaluation purposes.
The following encoders can be connected to the SMC30 Sensor Module:
● TTL encoder
● HTL encoder
● SSI encoder
● KTY or PTC temperature sensor
Table 4- 45 Connectable encoders with supply voltage
Encoder type X520 (D-Sub) X521 (terminal) X531 (terminal) Open-circuit
monitoring
Remote sense
HTL bipolar 24 V Yes Yes Yes Yes No
HTL unipolar 24 V Yes Yes Yes No No
TTL bipolar 24 V Yes Yes Yes Yes No
TTL bipolar 5 V Yes Yes Yes Yes To X520
TTL unipolar No No No No No
SSI 24 V/5 V Yes Yes Yes No No
Table 4- 46 Maximum signal cable lengths
Encoder type Maximum signal cable length in m
TTL 100
HTL unipolar 100
HTL bipolar 300
SSI 100
Note
Because the physical transmission media is more robust, the bipolar connection should
always be used for HTL encoders. The unipolar connection should only be used if the
encoder type does not output push-pull signals.