Connection Cable and Cable Wiring
Industio
CI-132 Series User’s Manual
5-3
RS-485 Cable Wiring
The RS-485 standard is an enhanced version of the RS-422 balanced line standard. It
allows multiple drivers and receivers in a multidrop systems. As many as 32 drivers
and 32 receivers can be put on any multidrop system.
The CI-132 Series supports
only 2-wire half-duplex RS-485 communication
.
Data+/-
pins are served for both data transmitting and receiving, depending on the
RTS signal.
RS-485 pin outs for CI-132:
CI-132
1
Data-(A)
2
Data+(B)
5
GND
Multidrop RS-485 Half-duplex
CI-132
RS-485 Device 1
Master
Slave
2
Data+
Data+
1
Data-
Data-
5
GND
GND
RS-485 Device N
Slave
Data+
Data-
GND
See the section “
RS-485 Programming
” of the chapter “
Serial Programming
Tools
” for more RS-485 programming details.
1 Data-(A)
2 Data+(B)
5 GND
