User Manual

TMCM-1070 Hardware Manual • Hardware Version V1.00 | Document Revision V1.10 • 2017-Oct-27
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270 Ω
+5V
>5V to +24V
Driver &
Controller
TMCM-1070 /
PD-x-1070
GND
A1
B2
A2
B1
M
COMM
270 Ω
270 Ω
270 Ω
EN
GND
DIR
GND
STEP
GND
CHOP
GND
R
external
R
external
R
external
R
external
Figure 10: Inputs with common anode input with >5V to 24V
The series resistors in the TMCM-1070 are 270mOhms. For operation with voltages higher than 5V an
additional external resistor R
external
is required per input to limit the current. See Table 7 as reference for
additional external resistor values.
COMM Voltage (V) Value of R
external
(Ω)
3.3 -
5 -
9 300
12 500
15 700
24 1K5
Table 7: Additional resistor reference values
Note
R
external
Selection
Take care when selecting an additional external resistor. The resistor type must
have a fitting power rating. This depends on the voltage used at COMM input.
5.3 Optically Isolated Inputs with Common Cathode Input
The optocouplers inside TMCM-1070 are bidirectional types (AC/DC). Thus, COMM can also be used as
common cathode connection with high-side (pnp style) switches instead of low side (npn style) as shown
in previous figures 10, 9 or 8.
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