SC6000
10
2
RS485 Full-Duplex Interface
The RS485 full-duplex 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 connections
to the Host can be made as follows:
through the PWO (in which case a CAB-SC6103 cable connects the PWO to the
SC6000)
directly to the SC6000
See also par. 2.5.1.
The following pins of the 9-pin connector are used for RS485 full-duplex interface
connection:
Pin
Name
Function
2
TX485 +
RS485 output (+)
3
RX485 +
RS485 input (+)
5
GND-ISO
Main signal ground
7
RX485 -
RS485 input (-)
8
TX485 -
RS485 output (-)
SC6000
8
TX485-
TX-
PWO
GND-ISO
5
RX485-
7
RX485+
3
RX+
TX485+
2
TX+
Shield
Host
Signal Ground
RX-
CAB-SC6103
Figure 11 - RS485 Full-Duplex Interface Connections: Host - PWO- SC6000
SC6000
8
TX485-
TX-
GND-ISO
5
RX485-
7
RX485+
3
RX+
TX485+
2
TX+
Shield
Host
Signal Ground
RX-
Figure 12 - RS485 Full-Duplex Interface Connections: Host - SC6000
