Moeller DE4-COM-2X, Manual

Page: 74 / 167

GB-13
03/01 AWB823-1279-D/GB/F
English
2 Engineering
RS 232 Interface Pin assignments
The following table describes the pin assignments of the
9 pin sub-D serial interface connector.
Figure 3: 9 pin sub-D plug for RS 232
h The process engineering information and example circuit
diagrams described in this manual are suggestions whose
suitability for the respective application must be checked
by the user.
Warning!
Suitable measures must be implemented to ensure that, if
the interface module fails, there is no risk of injury to
personnel or damage to equipment.
3 4 1 2 5
8 9 6 7
Pin Designation Input/ output Comment
1 – – Unused
2 RxD Input Receive RS 232 data
3 TxD Output Send RS 232 data
4 DTR Output Data send control signal
for RS 232
5 GND – Signal earth 0 V
6 DSR Input Unused RS 232
7 T/R(A) Input/output RS 485
8 T/R(B) Input /output RS 485
9 Vcc 5 Output Power 5 V/10 mA