2-Wire Rs485 Example Of Wiring; Rs232 Example Of Wiring - ADEUNIS WMBUS MODBUS MASTER Guide Utilisateur

WMBUS MODBUS MASTER - Guide utilisateur / User guide version V1.0.0

5.3. 2-wire RS485 example of wiring

Associated configuration:
• Register 321 : bit 0 = 0 (RS485)
• Switch :
• Int 1 = ON (RS-485 bus end-of-line resistor)
(RS-485 bus polarization)
• Int 2 and 3 = ON

5.4. RS232 example of wiring

Associated configuration:
• Register 321 : bit 0 =
1 (RS232)
• Switch :
(RS-485 bus end-of-line resistor)
• Int 1 = OFF
• Int 2 et 3 = OFF (RS-485 bus polarization)
ESCLAVE MODBUS
RS-485 2 fils
C (GND)
B (TX)
A (RX)
V+
GND
ESCLAVE MODBUS
RS-232
GND
TX
RX
V+
GND
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