Installation manual

DS4600A
12
2
RS485 Full-Duplex Interface
The RS485 full-duplex (5 wires + shield) interface is used for non-polled
communication protocols in point-to-point connections over longer distances (max
1200 m / 3940 ft) than those acceptable for RS232 communications or in electrically
noisy environments.
The following pins of the 25-pin connector are used for RS485 full-duplex
communications:
Pin Name Function
2 TX485+ RS485 transmitted data +
4 TX485- RS485 transmitted data -
3 RX485+ RS485 received data +
5 RX485- RS485 received data -
7 SGND Main signal ground main interface
DS4600A
USER INTERFACE
7
SGND Main
TX485+
2
TX485-
4
RX485+
3
RX485-
5
RX485
TX485
RS485REF
Earth
Ground
Figure 8 - RS485 Full-Duplex Connections