TMCM-1181 V3.0 Hardware Manual (Rev. 0.90 / 2015-JUL-10)
9
3.3.3 Interface Connector
A 4pin JST EH series 2.5mm pitch connector is used as Interface Connector.
Pin
1
Label
GND
Direction
Power (GND)
Description
Module ground (system and signal ground)
Analog input 4, 0… 10V (analog to digital converter
range)
2
IN4
Input
4
1
3
4
RS485+
RS485-
Bi-directional Differential RS485 bus signal (non-inverting)
Bi-directional Differential RS485 bus signal (inverting)
Table 3.3: Interface connector
+3.3V
IN4
47k
22k
microcontroller
100nF
GND GND
GND
Figure 3.3 Internal circuit of analog input IN4
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