2.1.2 RS-485 (Modbus RTU)
Port pinning
| Pin | Function | Pigtail wire color |
|---|---|---|
| 1 | GND | brown |
| 2 | B | red |
| 3 | A | orange |
| 4 | VIN, 5V or 3.3V | black |
RS-485 (Modbus RTU)
SmartSampler2 uses this half-duplex RS-485 interface for compatible Modbus RTU instruments. The baud rate, serial frame, device address, register definitions, byte order, scaling, and offset must match the connected device.
Related configuration: 4.2.5 RS-485 (Modbus RTU) in SmartConfig2.