Webdyn WebdynSunPM - Page 32

32
USER MANUAL – WebdynSunPM
Version 2.05
préliminaire
4-wire RS485/ RS485 wiring (Full-Duplex):
This type of connection uses two pairs of wires for communication. One pair of wires carries
data sent from the concentrator to the device and the other pair the data sent from the device
to the concentrator. Several systems can be connected to the bus as shown on the following
figure.
WebdynSunPM
Only to be wired if the concentrator is at the end of the line
2-wire
wiring
Terminal resistor
120
B
A
C
Device
1
D1
D0
Device
3
G
D
D
G
Device
4
D-
D+
GND
Device
2