
EN
sigfox MODBUS MASTER - Guide utilisateur / User guide version V1.0.1
69
Page
of 80
FR
5. START-UP
5.1. Wires description
3_- SENSOR POWER SUPPLY
4_+ SENSOR POWER SUPPLY
5_TX (B)
6_RTS (not managed)
7_RX (A)
8_CTS (not managed))
9_GND
1 _+ EXT POWER
2_- EXT POWER
Signal cord 7 FILS
2-Wire Power Cord
5.2. Link configuration
The Modbus physical layer supports a RS485 (default) or RS232 serial link. The bit 0 of register 321 allows to configure this choice :
• Bit 0 = 0 (default): RS485
• Bit 0 = 1: RS232
On the other hand, a 3-way switch present on the electronic board allows the configuration of the end-of-line resistor and the RS485 bus
polarization:
• Switch 1 = ON (RS-485 bus end-of-line resistor)
• Switches 2 and 3 = ON (RS-485 bus polarization)
The default switch configuration is all channels ON.
Important: in case of RS232 configuration, the 3 channels of the switch must be set to OFF.
Содержание LoRaWAN MODBUS MASTER ARF8240AA
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