Comprehensive Product Summary – UCON485DB-I RS-232 to RS-422/RS-485 Double Barrier Isolated Converter

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### 1. Product Overview

Product Name: UCON485DB-I
Model: UCON485DB-I
Series: UCON Industrial Communication Converter Series
Article Number: UCON485DBI
Manufacturer: Rayon Technology Co., Ltd.
Product Type: RS-232 to RS-422 / RS-485 Double Barrier Isolated Converter
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 UCON485DB-I is a high-performance industrial-grade communication converter designed to interface RS-232 serial signals with RS-422 or RS-485 networks. It provides double barrier isolation between input and output circuits, ensuring reliable data transmission and protection against ground loops and electrical interference. The device is part of Rayon Technology’s UCON series of isolated communication converters, known for robust design, flexible configuration, and industrial reliability.

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### 2. Key Features

- Dual Isolation Design: Provides double barrier isolation between RS-232 input and RS-422/RS-485 output, effectively eliminating ground loops and ensuring signal integrity in electrically noisy environments.
- Triple Way Isolation: Incorporates triple isolation between RS-232, RS-422/RS-485, and power supply circuits for enhanced protection and system stability.
- Flexible Interface Configuration: Easily configurable as full-duplex RS-422 or half-duplex RS-485 via onboard DIP switch settings.
- LED Indicators: Independent LED indicators for power and data transmission (TX/RX) on both input and output ports, allowing real-time monitoring of communication activity.
- Industrial-Grade Design: Rugged enclosure suitable for industrial automation, control systems, and data communication applications.
- Compact Form Factor: Space-efficient housing (92 × 118 × 27 mm) suitable for panel or desktop installation.
- Ground Isolation: Both RS-232 and RS-422/RS-485 ports are ground-isolated from the power input, preventing signal degradation and equipment damage.
- Standard Connectors: Equipped with two male DB9 connectors for straightforward integration with existing serial equipment.
- Power Efficiency: Operates on a stable 5 VDC supply with a typical current consumption of 300 mA.
- Wide Environmental Tolerance: Designed for operation in ambient temperatures from 0°C to 55°C and humidity up to 95% RH.
- Accessory Compatibility: Supports optional TB485 terminal block adapter for converting DB9 connections to 3-pin terminal blocks for RS-485 wiring.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Model | UCON485DB-I |
| Function | RS-232 to RS-422 / RS-485 Double Barrier Isolated Converter |
| Input Interface | RS-232 (DB9 male connector) |
| Output Interface | RS-422 / RS-485 (DB9 male connector) |
| Isolation Type | Double barrier isolation (input to output); triple way isolation (RS-232, RS-422/RS-485, power) |
| Power Supply | 5 VDC (via UP110/UP220 adapter) |
| Current Consumption | Typical 300 mA |
| LED Indicators | Power (PWR), TX/RX activity for RS-232 and RS-422/RS-485 ports |
| 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 |
| Material | Industrial-grade ABS or metal alloy enclosure (depending on version) |
| Mounting | Desktop or panel mount |
| Connector Pinout (RS-422) | TX+, TX−, RX+, RX−, GND (isolated) |
| Connector Pinout (RS-485) | Data+, Data−, GND (isolated) |
| Configuration Method | DIP switch selection for RS-422 or RS-485 mode |
| Isolation Voltage | Typically 2500 VDC (between input, output, and power circuits) |
| Manufacturer | Rayon Technology Co., Ltd. |

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### 4. Functionality

The UCON485DB-I serves as a signal-level converter that translates RS-232 serial communication signals into RS-422 or RS-485 differential signals. It is designed for industrial and automation systems where long-distance, noise-immune communication is required.

Operating Principle:
- The RS-232 input port receives single-ended serial data from a host device such as a PC, PLC, or controller.
- The converter isolates and translates this data into differential RS-422 or RS-485 signals, which are transmitted over twisted-pair cabling to remote devices.
- The double barrier isolation ensures that electrical surges, ground potential differences, or noise on one side do not affect the other side.
- DIP switches allow users to select between RS-422 full-duplex (four-wire) and RS-485 half-duplex (two-wire) operation modes.

Use Cases and Applications:
- Industrial automation and control systems
- Building management systems (BMS)
- SCADA and telemetry networks
- Data acquisition systems
- Serial communication extension over long distances
- Integration of legacy RS-232 equipment into modern RS-485 networks
- Ground loop elimination in multi-device serial networks

Compatibility:
- Compatible with standard RS-232, RS-422, and RS-485 communication protocols.
- Works with most serial communication software and hardware interfaces.
- Supports connection to PLCs, HMIs, sensors, controllers, and industrial PCs.

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### 5. Components & Accessories

Included Components:
- UCON485DB-I converter unit
- Power LED and TX/RX activity LEDs (integrated)
- Two DB9 male connectors (RS-232 input and RS-422/RS-485 output)
- DIP switch for interface configuration
- Power input jack (5 VDC)

Optional Accessories:
- UP110 / UP220 Power Adapter: 5 VDC regulated power supply compatible with the converter.
- TB485 Terminal Block Kit: DB9 female to RS-485 3-pin terminal block adapter for easy wiring to field devices.
- Mounting Hardware: Optional brackets or adhesive pads for panel or DIN-rail installation (depending on version).

Connectors and Indicators:
- PWR LED: Indicates DC power input status.
- Serial1 TX/RX LEDs: Show data transmission and reception activity on the RS-232 port.
- Serial2 TX/RX LEDs: Show data transmission and reception activity on the RS-422/RS-485 port.

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### 6. Installation & Setup

Requirements:
- Power supply: 5 VDC regulated, minimum 300 mA capacity.
- Compatible RS-232 and RS-422/RS-485 devices.
- Proper cabling (DB9 or terminal block as required).

Installation Steps:
1. Power Connection: Connect the supplied 5 VDC adapter (UP110/UP220) to the power input jack. Verify that the PWR LED illuminates.
2. RS-232 Input: Connect the RS-232 source device (e.g., PC or controller) to the Serial1 DB9 male connector.
3. RS-422/RS-485 Output: Connect the target device or network to the Serial2 DB9 male connector.
4. Mode Selection: Use the DIP switch to select the desired communication mode:
- RS-422 (Full Duplex): TX+/TX− and RX+/RX− lines active.
- RS-485 (Half Duplex): TX+ shorted to RX+, TX− shorted to RX− for two-wire operation.
5. Verification: Observe the TX/RX LEDs to confirm data transmission and reception.

Mounting Options:
- Desktop placement for laboratory or office use.
- Panel mounting using screws or brackets for industrial environments.
- Optional DIN-rail mounting with accessory kit (if available).

Configuration Notes:
- Ensure correct DIP switch settings before powering the device.
- Maintain proper grounding and shielding for long-distance communication lines.
- Use twisted-pair cabling for RS-422/RS-485 connections to minimize noise interference.

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### 7. Performance & Capabilities

Data Transmission:
- Supports standard asynchronous serial communication rates (typically up to 115.2 kbps or higher depending on cable length and environment).
- Provides reliable data transfer over distances up to 1200 meters (RS-485 typical).

Isolation & Protection:
- Double barrier isolation between input and output circuits.
- Triple isolation between RS-232, RS-422/RS-485, and power supply.
- Protection against ground potential differences and transient surges.

Efficiency & Reliability:
- Low power consumption (300 mA typical at 5 VDC).
- Stable operation across wide temperature and humidity ranges.
- LED indicators provide immediate visual feedback for troubleshooting.

Limitations:
- Requires external 5 VDC power supply (not USB-powered).
- Not designed for outdoor or high-vibration environments without additional protection.
- Limited to standard RS-232/RS-422/RS-485 communication protocols (no USB or Ethernet support).

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### 8. Standards & Compliance

Electrical and Communication Standards:
- Complies with EIA/TIA-232, EIA/TIA-422, and EIA/TIA-485 serial communication standards.
- Isolation and grounding conform to industrial safety and EMC requirements.

Certifications (typical for Rayon products):
- CE (Electromagnetic Compatibility and Safety)
- RoHS (Restriction of Hazardous Substances)
- ISO 9001: Quality Management System (manufacturer certification)

Industry Standards:
- Designed for industrial automation and control system integration.
- Compatible with Modbus RTU and other serial communication protocols.

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### 9. Additional Information

Warranty:
Standard manufacturer warranty (typically one year) covering defects in materials and workmanship under normal operating conditions.

Technical Support:
Rayon Technology provides technical assistance via email and phone for configuration, troubleshooting, and integration support.

Maintenance:
- Periodically inspect connectors and cables for wear or corrosion.
- Keep the device clean and free from dust accumulation.
- Avoid exposure to moisture or extreme temperatures beyond specified limits.

Firmware / Updates:
The UCON485DB-I operates as a hardware-level converter and does not require firmware updates. Configuration is entirely hardware-based via DIP switches.

Related Products:
- UCON422DB-I: Triple way ground-isolated RS-422/RS-485 to RS-422/RS-485 repeater/bridge.
- UCON485DB-I: RS-232 to RS-422/RS-485 converter (current model).
- U2485DB-I: Universal RS-232/RS-422/RS-485 to RS-232/RS-422/RS-485 converter with triple isolation.

Trademark Notice:
All product names and trademarks are the property of their respective owners.

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### Summary

The UCON485DB-I from Rayon Technology Co., Ltd. is a robust, industrial-grade RS-232 to RS-422/RS-485 double barrier isolated converter engineered for reliable serial communication in demanding environments. Its triple isolation design, flexible configuration, and LED diagnostics make it ideal for system integrators and engineers seeking dependable signal conversion and electrical isolation. Compact, efficient, and easy to install, the UCON485DB-I ensures safe and stable data transmission across diverse industrial and automation applications.