RS485 Communication Module - Unbiased 2-Wire Modbus RTU is an RS485 communication module designed for Modbus RTU networking with compatible Genie Pro smart relay PLC systems. It provides an unbiased 2-wire RS485 interface for networks where biasing is supplied externally or by another polarized device.
🔧 Technical Highlights:
- Protocol: Modbus RTU slave
- Transmission mode: RTU, 8 bits
- Interface type: 2-wire RS485
- Baud rates: 9600, 19200, 38400 and 57600 baud
- Parity: None, even or odd
- Stop bits: 1 or 2
- Line termination: Internal 120 Ω
- Biasing: External 4.7 kΩ bias resistor required where network biasing is needed
- Enclosure protection: IP30
- Dimensions: 26.3 x 43.82 x 14.25 mm
- Operating temperature: -20°C to +55°C
✅ Benefits:
- Adds Modbus RTU communication to compatible smart relay PLC systems.
- 2-wire RS485 interface supports common industrial serial networks.
- Selectable baud rate, parity and stop-bit settings support integration flexibility.
- Compact plug-in format suits small automation panels.
🚀 Applications:
- Modbus RTU communication with drives, meters and remote devices
- SCADA, BMS and plant-floor serial network integration
- Machine and panel communication expansion
- Retrofit automation projects requiring RS485 connectivity
Designed for reliable RS485 communication in compact industrial automation systems.
FAQs
- Q: What is the difference between biased and unbiased RS485 modules?
A: A biased module includes internal biasing resistors to define the idle bus state. An unbiased module requires external biasing or another polarized device on the network.
- Q: Does this module support Modbus RTU?
A: Yes. It supports Modbus RTU slave communication over a 2-wire RS485 interface.