Modbus Gateway RS485 Installation
1 - Electrical Connections
Refer to IoT Pro Opening and Closing for instructions on opening the device to access its wiring connections.
Use a 4-core, 2-pair twisted cable, 0.22mm², such as LAPP 0031320.
Use one twisted pair for RS485 A and B
Use the second twisted pair for Signal GND / 0V
Terminate the cable shield to chassis/PE at one end only. Do not use the shield as the Signal GND conductor.
The 120Ω termination resistor is included by default
Note: For older versions of the daughter board (IOTPRO_RS485_03), the B* connection represents the termination resistor. To connect the termination resistor, short B with B*.
2 - Mechanical Installation
Refer to IoT Pro Installation Options for different installation options. Wall anchors are recommended for most applications.
3 - System Commissioning
Device Setup
Activate the IoT Pro device according to the communication network being used: