Details
Reliable RS-485 Communication in Harsh Electrical Environments
Optoisolated RS-485 hub with surge, ESD and lightning protection.
3Wire RS2S2 is a high-performance RS-485 hub designed for environments with complex electromagnetic interference and demanding communication conditions.
With optoelectronic isolation, surge protection and automatic data direction control, RS2S2 helps maintain stable RS-485 communication in industrial and outdoor applications.
Introduction
RS2S2 is designed to strengthen RS-485 communication networks in locations affected by electromagnetic interference, surge risk, grounding issues and long cable runs.
It supports data transmission rates of up to 115.2 kbps and uses optoelectronic isolation technology together with 600W surge protection to improve communication reliability.
The built-in optoisolator provides up to 2,500V isolation, offering strong protection against lightning surges and ESD while helping reduce communication instability caused by ground interference.
Why Use RS2S2?
Strong Electrical Isolation
Built-in optoisolation provides up to 2,500V isolation to help protect RS-485 communication circuits.
Surge and ESD Protection
Includes 600W lightning and surge protection per RS-485 line with ±15kV ESD protection.
Automatic Direction Control
Automatically detects RS-485 data flow direction and switches transmission direction accordingly.
Features
- High-performance RS-485 hub for complex electromagnetic interference environments
- Supports data transmission up to 115.2 kbps
- Optoelectronic isolation technology for reliable communication
- Built-in optoisolator with up to 2,500V isolation
- 600W lightning and surge protection per RS-485 line
- ±15kV ESD protection
- External SMPS power supply helps eliminate common ground interference
- Suitable for outdoor and field applications
- Automatic data direction control for RS-485 communication
- Automatically detects data flow direction and switches accordingly
- Helps solve RS-485 communication time delay issues
- LED status indicators for Power, TXD and RXD
Typical Applications
RS2S2 is suitable for RS-485 communication networks that require isolation, protection and stable data transmission in industrial or outdoor environments.
Industrial Automation
Improve RS-485 communication reliability between controllers, meters, devices and field equipment.
Energy Monitoring
Support stable communication for RS-485 meters, data loggers and energy monitoring systems.
Outdoor RS-485 Networks
Improve protection for outdoor or distributed RS-485 cable networks exposed to surge and grounding risk.
Building and Utility Systems
Support BMS, EMS, water, gas, power and utility monitoring applications using RS-485.
Remote Monitoring
Help maintain reliable serial communication in long-distance remote monitoring systems.
Harsh Electrical Environments
Suitable for areas with EMI, grounding issues, lightning risk or unstable RS-485 communication.
Specifications
The following table summarises the general specifications for the 3Wire RS2S2 isolated RS-485 hub.
| Item | Specification |
|---|---|
| Standards | RS-485, EIA / TIA compliant |
| Interface | RS-485 Input: 4-pin terminal block RS-485 Output: 6-pin terminal block |
| Transmission Media | Twisted-pair or shielded cable |
| Communication Mode | Asynchronous half-duplex |
| Power Supply | 9–40V DC, 500mA |
| Indicators | LED status indicators for Power (PWR), Transmit (TXD) and Receive (RXD) |
| Isolation Voltage | 2,500V RMS 500V DC with DC/DC isolation module |
| Baud Rate | 300 bps to 115.2 kbps |
| Protection Features | 600W lightning and surge protection per RS-485 line ±15kV ESD protection |
| Transmission Distance | 0 to 3,000 metres, dependent on baud rate from 115.2 kbps to 300 bps |
| Dimensions | 80 × 50 × 31 mm |
| Operating Environment | Temperature: –40°C to +85°C Relative Humidity: 5% to 95%, non-condensing |
Product Summary
3Wire RS2S2 is a compact isolated RS-485 hub designed to improve communication stability in harsh electrical environments.
With 2,500V optoisolation, 600W surge protection, ±15kV ESD protection, automatic data direction control and transmission distance up to 3,000 metres, RS2S2 is suitable for robust industrial, outdoor and utility RS-485 communication systems.
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