User Manual

TMCM-1160 V1.01 Hardware Manual (Rev. 1.01 / 2012-JUL-27) 14
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3.2.5 Encoder Connector
The module supports an external incremental a/b/n encoder via this connector. The external encoder may
be used in addition or as an alternative to the internal / on-board sensOstep encoder.
A 2mm pitch 5-pin JST B5B-PH-K connector is used for connecting an external encoder with TTL (+5 V
push-pull) or open-collector signals directly:
1
5
Pin
Label
Description
1
GND
Module ground (system and signal ground)
2
+5V
+5V supply output for external encoder circuit (100 mA max.)
3
ENC_A
Encoder a channel input (internal pull-up)
4
ENC_B
Encoder b channel input (internal pull-up)
5
ENC_N
Optional encoder n / index channel input (internal pull-up)
Table 3.5 Connector for an external incremental encoder
3.2.5.1 Encoder Inputs
The TMCM-1160 offers a dedicated encoder input for incremental a/b encoders with optional n / index-
channel.
Encoders with +5 V push-pull (TTL) signals or open-collector signals (on-board pull-ups) might be
connected directly. This connector offers a +5 V supply output for supply of the encoder circuit. Up to
100mA might be drawn from this output.
Connecting an external encoder is an option. An external encoder might be used in addition or as
alternative to the internal sensOstep encoder.
ENC_A microcontroller
2k7
1
+5V
ENC_B
ENC_N
2k7 2k7
1
1
microcontroller
microcontroller
Figure 3.9 Encoder a/b/n inputs