Webdyn WebdynRF Installation Manual page 18

WEBDYN
WebdynRF
Installation Manual
The gateway may be located at the end of the RS485 communication bus, or in the
middle of the bus.
To ensure that the RS485 data bus functions, it must have a 120 Ohm plug on both
ends.
Depending on the positioning of the gateway on the bus, this plug must be placed
outside the box.
Consult the Modbus equipment documentation concerning its RS485 cabling and
connection principle.
Once the RS485 cable is available in the vicinity of the gateway:
1. Strip off approximately 4 cm of the RS485 communication cable's sheath.
3. Cut the shielding back to the length of the cable sheath.
4. Strip the wires to a length of approximately 6 mm.
5. Connect the conductors to the connector marked RS485/RS422, following the
assignments in your RS485 communication bus.
4-wire RS485 assembly:
TX+ TX- RX+ RX-
2-wire RS485 assembly:
WebdynRF – Installation Manual - Version 1.0 18