Technosoft IDM240-5EI - Serial Communication - J4 Connector

© Technosoft 2011 47 IDMx40 Technical Reference
3.2.6. Serial Communication – J4 Connector
Pin Name Type Function
1 485A+ I/O RS-485 line A (positive during stop bit)
2 TxD O RS-232 Data Transmission
3 RxD I RS-232 Data Reception
4 N.C. Not Connected
5 GND Ground
6 485B- I/O RS-485 line B (negative during stop bit)
7 N.C. Not Connected
8 N.C. Not Connected
9 +5 V O Supply for RS-485 terminator and/or supply for handheld terminal
(internally generated)
2
3
5
9
GND
TxD
RxD
3
RS-232
Transceiver
RS-485
Transceiver
+5V
1
6
+3.3V
232Rx
232Tx
485Rx
485Tx
SHIELD
- RS-232 Connection -
J4
IDMx40-xxIJ4 - RS-232 / RS-485 Connector
RS-232 serial cable
1 to 1, male-female
DSP Controller
SW1
485 / 232
OFF
ON
GND
TX232
RX232
21345
6789
Figure 3.27. J4 – Serial RS-232 connection
IDMx40