TMCM-1180 and PD86-1180 Hardware Manual (V1.05 / 2013-JUL-26)
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4.3.6
Step/Direction Connector
A 2mm pitch 4 pin connector is used for connecting the Step/Dir interface.
4
1
Pin
Label
Description
1
OC_COM
Common supply / opto-coupler (+5V .. +24V)
2
OC_EN
Enable signal
3
OC_STEP
Step signal
4
OC_DIR
Direction signal
Table 4.6 Step/Dir connector
C
E
A
K
EN
DIR
STEP
OC_COM
OC_EN
OC_DIR
OC_STEP
GND
+3.3V
4k
75
4k
75
4k
75
GND
I
const
= 8mA
I
const
= 8mA
Figure 4.12 Internal circuit of the Step/Dir interface
