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FT232RL USB to RS485 Converter Module with ADUM3160 Isolation | Industrial Serial Port Adapter with Coupling Protection
FT232RL USB to RS485 Converter Module with ADUM3160 Isolation | Industrial Serial Port Adapter with Coupling Protection
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FT232RL USB to RS485 Converter Module — ADUM3160 Isolation, Industrial Serial Port Adapter
An industrial-grade USB to RS485 serial converter module combining the FTDI FT232RL USB-to-UART chip with an Analog Devices ADUM3160 USB digital isolator for 2500V galvanic isolation between the USB host and the RS485 bus. The isolation protects the host PC from ground loops, voltage spikes, and common-mode noise on the RS485 bus in industrial environments. Suitable for Modbus RTU, SCADA, PLC, and industrial automation serial communication applications requiring electrical isolation for safety and noise immunity.
Technical Specifications
| Parameter | Value |
|---|---|
| USB Chip | FTDI FT232RL |
| Isolator | Analog Devices ADUM3160 (USB digital isolator) |
| Isolation Voltage | 2500V RMS (working isolation) |
| Interface | USB 2.0 Full Speed (12Mbps) to RS485 half-duplex |
| RS485 Baud Rate | Up to 1Mbps |
| RS485 Mode | Half-duplex (2-wire: A+, B−) |
| Bus Load | Up to 32 unit loads (32 devices per bus segment) |
| ESD Protection | RS485 bus pins protected to ±15kV (HBM) |
| Supply | USB bus-powered (5V from host) |
| OS Support | Windows, macOS, Linux (FTDI VCP driver) |
| Connector | USB Type-A or Type-B (host side) + terminal block (RS485 side) |
| Certification | CE, RoHS |
Isolation Benefits for Industrial Use
| Without Isolation | With ADUM3160 Isolation |
|---|---|
| Ground loop currents damage USB port | 2500V isolation eliminates ground loops |
| Voltage spikes from inductive loads corrupt data | Isolation blocks transient voltage spikes |
| Common-mode noise causes communication errors | Isolation rejects common-mode noise |
| PC at risk from industrial voltage faults | PC protected from RS485 bus faults |
Typical Applications
- Modbus RTU: Connect a PC or Raspberry Pi to Modbus RTU devices (PLCs, VFDs, energy meters, sensors) via isolated RS485 for reliable industrial communication
- SCADA Systems: Isolated RS485 interface for SCADA host computers communicating with remote terminal units (RTUs) and field devices
- PLC Programming: Isolated USB-RS485 adapter for programming and monitoring Siemens, Mitsubishi, and other RS485-based PLCs
- Building Automation: RS485 bus interface for BACnet MS/TP, DALI, and KNX building automation systems
- Solar Inverter Monitoring: Isolated RS485 interface for monitoring SMA, Growatt, and other solar inverters via Modbus RTU protocol
- Industrial Sensor Networks: Multi-drop RS485 sensor network interface for temperature, pressure, and flow sensor arrays in industrial plants
FAQ
Q: Why use ADUM3160 isolation instead of a standard USB-RS485 adapter?
A: Standard USB-RS485 adapters share a common ground between the PC and the RS485 bus. In industrial environments, ground potential differences of tens or hundreds of volts can damage the PC’s USB port and corrupt data. The ADUM3160 provides 2500V galvanic isolation, eliminating this risk.
Q: Does this adapter support RS422?
A: The RS485 transceiver on this module supports half-duplex RS485 (2-wire). For full-duplex RS422 (4-wire), a different module with separate TX and RX pairs is required.
Package Contents
- 1 × FT232RL USB to RS485 converter module with ADUM3160 isolation
- ★Product Description
- ★About us
- ★Custom cable
FT232RL USB to RS485 Converter Module — ADUM3160 Isolation, Industrial Serial Port Adapter
An industrial-grade USB to RS485 serial converter module combining the FTDI FT232RL USB-to-UART chip with an Analog Devices ADUM3160 USB digital isolator for 2500V galvanic isolation between the USB host and the RS485 bus. The isolation protects the host PC from ground loops, voltage spikes, and common-mode noise on the RS485 bus in industrial environments. Suitable for Modbus RTU, SCADA, PLC, and industrial automation serial communication applications requiring electrical isolation for safety and noise immunity.
Technical Specifications
| Parameter | Value |
|---|---|
| USB Chip | FTDI FT232RL |
| Isolator | Analog Devices ADUM3160 (USB digital isolator) |
| Isolation Voltage | 2500V RMS (working isolation) |
| Interface | USB 2.0 Full Speed (12Mbps) to RS485 half-duplex |
| RS485 Baud Rate | Up to 1Mbps |
| RS485 Mode | Half-duplex (2-wire: A+, B−) |
| Bus Load | Up to 32 unit loads (32 devices per bus segment) |
| ESD Protection | RS485 bus pins protected to ±15kV (HBM) |
| Supply | USB bus-powered (5V from host) |
| OS Support | Windows, macOS, Linux (FTDI VCP driver) |
| Connector | USB Type-A or Type-B (host side) + terminal block (RS485 side) |
| Certification | CE, RoHS |
Isolation Benefits for Industrial Use
| Without Isolation | With ADUM3160 Isolation |
|---|---|
| Ground loop currents damage USB port | 2500V isolation eliminates ground loops |
| Voltage spikes from inductive loads corrupt data | Isolation blocks transient voltage spikes |
| Common-mode noise causes communication errors | Isolation rejects common-mode noise |
| PC at risk from industrial voltage faults | PC protected from RS485 bus faults |
Typical Applications
- Modbus RTU: Connect a PC or Raspberry Pi to Modbus RTU devices (PLCs, VFDs, energy meters, sensors) via isolated RS485 for reliable industrial communication
- SCADA Systems: Isolated RS485 interface for SCADA host computers communicating with remote terminal units (RTUs) and field devices
- PLC Programming: Isolated USB-RS485 adapter for programming and monitoring Siemens, Mitsubishi, and other RS485-based PLCs
- Building Automation: RS485 bus interface for BACnet MS/TP, DALI, and KNX building automation systems
- Solar Inverter Monitoring: Isolated RS485 interface for monitoring SMA, Growatt, and other solar inverters via Modbus RTU protocol
- Industrial Sensor Networks: Multi-drop RS485 sensor network interface for temperature, pressure, and flow sensor arrays in industrial plants
FAQ
Q: Why use ADUM3160 isolation instead of a standard USB-RS485 adapter?
A: Standard USB-RS485 adapters share a common ground between the PC and the RS485 bus. In industrial environments, ground potential differences of tens or hundreds of volts can damage the PC’s USB port and corrupt data. The ADUM3160 provides 2500V galvanic isolation, eliminating this risk.
Q: Does this adapter support RS422?
A: The RS485 transceiver on this module supports half-duplex RS485 (2-wire). For full-duplex RS422 (4-wire), a different module with separate TX and RX pairs is required.
Package Contents
- 1 × FT232RL USB to RS485 converter module with ADUM3160 isolation
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