Connection Cable and Cable Wiring
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-134 Series supports only 2-wir e 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-134:
| CI-134 | | | 1 | Data-(A) |
1 | Data-(A) | | 2 | Data+(B) |
|
| | |
2 | Data+(B) | | 5 | GND |
5 | GND | |
|
Multidrop RS-485 Half-duplex
CI-134 | | | | RS-485 Device 1 |
Master | | | | Slave |
2 | Data+(B) | | | | Data+(B) |
1 | Data-(A) | | | | Data-(A) |
| | |
5 | GND | | | | GND |
| |
RS-485 Device N
Slave
Data+(B)
Data-(A)
GND
See the section “RS-485 Pr ogr amming” of the chapter “Ser ial Pr ogr amming Tools” for more RS-485 programming details.
Industio CI-134 Series User’s Manual 5-3
