sigfox MODBUS MASTER - Guide utilisateur / User guide version V1.0.0
5.3. 2-wire RS485 example of wiring
FR
EN
Associated configuration:
•
Register 321 : bit 0 = 0 (RS485)
•
Switch :
•
Int 1 = ON (RS-485 bus end-of-line resistor)
•
Int 2 and 3 = ON
5.4. RS232 example of wiring
Associated configuration:
•
Register 321 : bit 0 =
•
Switch :
•
Int 1 = OFF
•
Int 2 et 3 = OFF (RS-485 bus polarization)
(RS-485 bus polarization)
1 (RS232)
(RS-485 bus end-of-line resistor)
ESCLAVE MODBUS
RS-485 2 fils
C (GND)
B (TX)
A (RX)
V+
GND
ESCLAVE MODBUS
RS-232
GND
TX
RX
V+
GND
Page
70
of 80