Comprehensive Product Summary – UCON422DB-I RS-422/RS-485 Double Barrier Isolator

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### 1. Product Overview

Product Name: UCON422DB-I
Model: UCON422DB-I
Series: UCON Double Barrier Isolator Series
Article Number: UCON422DBI
Manufacturer: Rayon Technology Co., Ltd.
Product Type: RS-422 / RS-485 to RS-422 / RS-485 Double Barrier Isolator
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou, New Taipei City, Taiwan
Contact:
- Tel: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net / info@rayontech.com.tw
- Website: [www.rayontech.com.tw](http://www.rayontech.com.tw) / [www.rayontech.com](http://www.rayontech.com)

The UCON422DB-I is a high-performance industrial-grade communication isolator designed to provide double barrier isolation between RS-422 and RS-485 serial interfaces. It functions as a repeater, bridge, or converter between RS-422 and RS-485 networks, ensuring reliable data transmission and protection against ground loops and electrical interference.

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### 2. Key Features

- Dual RS-422/RS-485 Interface: Supports one RS-422/RS-485 input and one RS-422/RS-485 output, configurable via DIP switch.
- Triple Way Isolation: Provides complete isolation between input, output, and power supply circuits, effectively breaking ground loops and preventing signal interference.
- Double Barrier Isolation: Ensures enhanced electrical protection between communication channels, improving system reliability in industrial environments.
- Versatile Operation Modes:
- RS-422 to RS-422 isolated repeater
- RS-485 to RS-485 isolated bridge
- RS-422 to RS-485 isolated converter
- LED Indicators: Dedicated LEDs for power and data transmission activity on each port (TXD/RXD indicators).
- User-Configurable Interface: Easily switch between full-duplex RS-422 and half-duplex RS-485 modes using onboard DIP switches.
- Standard Connectors: Equipped with two male DB9 connectors for input and output ports.
- Compact Industrial Design: Rugged enclosure measuring 92 × 118 × 27 mm, suitable for panel or desktop installation.
- Low Power Consumption: Operates on 5 VDC with a typical current draw of 300 mA.
- Wide Environmental Tolerance: Designed for industrial temperature and humidity ranges (0°C–55°C operating, up to 95% RH).
- Accessory Compatibility: Supports optional TB485 DB9-to-terminal block adapter for flexible wiring.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Model | UCON422DB-I |
| Interface Type | RS-422 / RS-485 (configurable) |
| Input Port | 1 × RS-422/RS-485 (DB9 male) |
| Output Port | 1 × RS-422/RS-485 (DB9 male) |
| Isolation Type | Double barrier, triple way isolation (input/output/power) |
| Power Supply | 5 VDC (via UP110/UP220 adapter) |
| Current Consumption | Typical 300 mA |
| LED Indicators | Power (PWR), TXD/RXD activity for each port |
| Dimensions | 92 mm (W) × 118 mm (L) × 27 mm (H) |
| Weight | Approx. 200–250 g (typical, depending on configuration) |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | 0°C to 65°C |
| Operating Humidity | 0% to 95% RH (non-condensing) |
| Storage Humidity | 5% to 95% RH |
| Connector Type | DB9 male (both ports) |
| Signal Pins | TX+, TX−, RX+, RX−, isolated GND |
| RS-485 Mode Wiring | TX+ and RX+ shorted as Data+, TX− and RX− shorted as Data− |
| Material | Industrial-grade enclosure (Rayon standard housing) |
| Mounting | Desktop or panel mount |
| Manufacturer | Rayon Technology Co., Ltd. |

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### 4. Functionality

The UCON422DB-I serves as a communication isolator and repeater for RS-422 and RS-485 serial networks. It isolates the input and output channels as well as the power supply, ensuring that electrical noise, surges, or ground potential differences do not propagate through the communication line.

Operating Modes:
1. RS-422 to RS-422 Repeater: Extends communication distance and isolates ground potential differences between two RS-422 segments.
2. RS-485 to RS-485 Bridge: Connects two RS-485 networks while maintaining electrical isolation, preventing ground loops.
3. RS-422 to RS-485 Converter: Converts between RS-422 and RS-485 standards, allowing interoperability between devices using different serial protocols.

Configuration:
- The interface type (RS-422 or RS-485) is selected via DIP switches located on the device.
- Each port operates independently, allowing flexible combinations (e.g., RS-422 input to RS-485 output).
- LED indicators provide real-time feedback for power and data transmission activity, simplifying diagnostics.

Applications:
- Industrial automation and control systems
- Data acquisition and monitoring networks
- Building management systems (BMS)
- SCADA and PLC communication networks
- Long-distance serial communication links
- Environments requiring galvanic isolation between serial devices

Compatibility:
- Compatible with standard RS-422 and RS-485 devices, including PLCs, sensors, controllers, and communication modules.
- Works with Rayon’s TB485 adapter for terminal block connectivity.

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### 5. Components & Accessories

Included Components:
- UCON422DB-I main unit
- Power LED and TXD/RXD activity LEDs
- Two DB9 male connectors (Serial1 and Serial2 ports)
- DIP switch for interface configuration

Optional Accessories:
- UP110 / UP220 Power Adapter: 5 VDC regulated power supply compatible with the UCON422DB-I.
- TB485 Adapter Kit: DB9 female to RS-485 terminal block converter for easy wiring to field devices.

LED Indicators:
- PWR: Indicates DC power input is active.
- Serial1 TXD/RXD: Displays data transmission and reception activity on input port.
- Serial2 TXD/RXD: Displays data transmission and reception activity on output port.

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### 6. Installation & Setup

Power Requirements:
- Requires a regulated 5 VDC power source (UP110 or UP220 adapter recommended).
- Typical current draw: 300 mA.

Mounting Options:
- Compact form factor allows for desktop placement or panel mounting in control cabinets.
- Ensure adequate ventilation and avoid exposure to excessive heat or moisture.

Configuration Steps:
1. Set Interface Type: Use the DIP switch to select RS-422 or RS-485 mode for each port.
2. Connect Serial Ports:
- Use DB9 cables for RS-422/RS-485 connections.
- For RS-485 terminal wiring, use the TB485 adapter to convert DB9 to 3-pin terminal block.
3. Power Connection: Connect the 5 VDC adapter to the power input jack.
4. Verify Operation: Check LED indicators for power and data activity.

Isolation Notes:
- Each serial port is isolated from the power supply and from each other.
- The isolation prevents ground potential differences and protects connected equipment from electrical surges.

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### 7. Performance & Capabilities

Data Transmission:
- Supports standard RS-422 and RS-485 data rates (typically up to 115.2 kbps or higher depending on cable length and environment).
- LED indicators provide visual confirmation of data flow, aiding in troubleshooting.

Isolation Performance:
- Triple way isolation ensures complete separation between input, output, and power circuits.
- Double barrier design enhances protection against transient voltages and ground loops.

Electrical Protection:
- Prevents signal degradation due to noise coupling or ground potential differences.
- Suitable for electrically noisy industrial environments.

Efficiency:
- Low power consumption (300 mA typical at 5 VDC).
- Minimal signal delay, ensuring real-time data integrity.

Limitations:
- Designed for standard RS-422/RS-485 voltage levels; not suitable for TTL or non-standard serial interfaces.
- Operating temperature limited to 55°C; ensure adequate cooling in high-temperature environments.

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### 8. Standards & Compliance

Electrical Standards:
- Complies with EIA/TIA RS-422 and RS-485 serial communication standards.
- Supports both full-duplex (RS-422) and half-duplex (RS-485) operation modes.

Isolation & Safety:
- Triple isolation design meets industrial-grade isolation requirements for serial communication equipment.
- Double barrier isolation ensures compliance with safety and EMC protection guidelines.

Environmental Compliance:
- Designed for industrial temperature and humidity ranges.
- Manufactured in compliance with RoHS environmental standards (lead-free construction).

Quality Assurance:
- Produced by Rayon Technology Co., Ltd., an ISO-certified manufacturer specializing in serial communication and interface conversion products.

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### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically one year, depending on region and distributor).
- Covers defects in materials and workmanship under normal operating conditions.

Technical Support:
- Provided by Rayon Technology Co., Ltd. through email and phone support.
- Documentation, configuration guides, and firmware updates available on the manufacturer’s website.

Maintenance:
- No regular maintenance required beyond ensuring clean connectors and stable power supply.
- Periodic inspection recommended for industrial installations to verify cable integrity and environmental conditions.

Product Family & Related Models:
- UCON232DB-I: Triple way ground-isolated RS-232 to RS-232 isolator.
- UCON485DB-I: Triple way ground-isolated RS-232 to RS-422/RS-485 interface converter.
- U2485DB-I: Universal triple way ground-isolated RS-232/RS-422/RS-485 to RS-232/RS-422/RS-485 converter.

Upgrade Path:
- The UCON422DB-I can be integrated with other Rayon isolators and converters to build complex, multi-protocol communication networks.

Manufacturer’s Note:
All product names and trademarks mentioned are the property of their respective owners. Rayon Technology Co., Ltd. reserves the right to modify specifications without prior notice to improve product performance or compliance.

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### Summary

The UCON422DB-I RS-422/RS-485 Double Barrier Isolator from Rayon Technology Co., Ltd. is a robust, industrial-grade communication interface device engineered for reliable, isolated serial data transmission. Its triple way isolation and double barrier protection make it ideal for environments where electrical noise, ground loops, or potential differences can disrupt communication.

With flexible configuration options, LED diagnostics, and compatibility with both RS-422 and RS-485 standards, the UCON422DB-I serves as a repeater, bridge, or converter in a wide range of industrial and automation applications. Its compact design, low power consumption, and adherence to communication standards ensure dependable performance and long-term reliability in demanding operational settings.