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- Bidirectional Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, allowing seamless communication between different serial standards.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow in RS-485 half-duplex mode, eliminating the need for software-based control or manual RTS toggling.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support:
- RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422: TxD±, RxD±, RTS±, CTS±, GND
- RS-485: Data±, GND
- LED Indicators: Five LEDs display power and signal status for TxD, RxD, RTS, CTS, and PWR, providing real-time communication diagnostics.
- Protection Features:
- TVS protection for all RS-422/485 signals (ESD 8 kV, EFT 2 kV)
- Overload protection for shorted signal lines
- Optical isolation (2 kV DC) available on A53 variant
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 devices in RS-485 multi-drop configuration over distances up to 1.2 km.
- Power Flexibility: Operates from +9 VDC to +30 VDC, compatible with industrial 24 VDC systems.
- Compact and Lightweight: Designed for easy integration in control panels or field installations.
- CE Certified: Meets European safety and EMC standards.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow in RS-485 half-duplex mode, eliminating the need for software-based control or manual RTS toggling.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support:
- RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422: TxD±, RxD±, RTS±, CTS±, GND
- RS-485: Data±, GND
- LED Indicators: Five LEDs display power and signal status for TxD, RxD, RTS, CTS, and PWR, providing real-time communication diagnostics.
- Protection Features:
- TVS protection for all RS-422/485 signals (ESD 8 kV, EFT 2 kV)
- Overload protection for shorted signal lines
- Optical isolation (2 kV DC) available on A53 variant
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 devices in RS-485 multi-drop configuration over distances up to 1.2 km.
- Power Flexibility: Operates from +9 VDC to +30 VDC, compatible with industrial 24 VDC systems.
- Compact and Lightweight: Designed for easy integration in control panels or field installations.
- CE Certified: Meets European safety and EMC standards.
Comprehensive Product Summary – Moxa Transio A52-230 RS-232 to RS-422/485 Converter
### 1. Product Overview
Product Name: Transio A52-230
Model: A52-230
Series: Transio A52/53 Series
Article Number: A52-230
Manufacturer: Moxa Technologies Co., Ltd.
Product Type: RS-232 to RS-422/485 External Converter with RJ11 Cable
Category: Serial Communication Interface Conversion Device
Power Supply: 230 VAC external power adapter (included)
The Moxa Transio A52-230 is a high-performance, bidirectional serial communication converter designed to bridge RS-232 interfaces with RS-422 or RS-485 networks. It enables reliable data transmission between legacy serial devices and modern industrial communication systems. The A52-230 model is part of Moxa’s Transio A52/53 series, known for robust design, automatic data direction control, and high-speed operation up to 921.6 kbps.
### 2. Key Features
- Bidirectional Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, allowing seamless communication between different serial standards.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow in RS-485 half-duplex mode, eliminating the need for software-based control or manual RTS toggling.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support:
- RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422: TxD±, RxD±, RTS±, CTS±, GND
- RS-485: Data±, GND
- LED Indicators: Five LEDs display power and signal status for TxD, RxD, RTS, CTS, and PWR, providing real-time communication diagnostics.
- Protection Features:
- TVS protection for all RS-422/485 signals (ESD 8 kV, EFT 2 kV)
- Overload protection for shorted signal lines
- Optical isolation (2 kV DC) available on A53 variant
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 devices in RS-485 multi-drop configuration over distances up to 1.2 km.
- Power Flexibility: Operates from +9 VDC to +30 VDC, compatible with industrial 24 VDC systems.
- Compact and Lightweight: Designed for easy integration in control panels or field installations.
- CE Certified: Meets European safety and EMC standards.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Model | A52-230 |
| Interface Conversion | RS-232 ↔ RS-422/485 |
| Baud Rate | Up to 921.6 kbps |
| RS-232 Connector | RJ45 (with optional RJ11 to DB9/DB25 cable) |
| RS-422/485 Connector | RJ45 or 6-pin terminal block |
| Signal Lines (RS-232) | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND |
| Signal Lines (RS-422) | TxD±, RxD±, RTS±, CTS±, GND |
| Signal Lines (RS-485) | Data±, GND |
| Protection | TVS (ESD 8 kV, EFT 2 kV) |
| Optical Isolation | None (A52); 2 kV DC (A53) |
| Termination Resistor | 120 Ω selectable (jumper) |
| Power Input | +9 VDC to +30 VDC |
| Power Consumption | 157 mA max @ +9 VDC |
| External Adapter | 9 V 1.5 A UL/TUV 110/230 VAC (supports up to 4 units) |
| Dimensions | 90 mm (L) × 60 mm (W) × 21 mm (H) |
| Weight | 76 g |
| Operating Temperature | 0°C to 55°C |
| Mounting Options | Wall or surface mount (plastic plates and screws included) |
| Compliance | CE approved |
| Cable Options | RJ11 to DB9F or DB25F (optional DB9M/DB25M) |
### 4. Functionality
The A52-230 functions as a transparent serial converter, enabling communication between RS-232-based devices (e.g., PCs, PLCs, or controllers) and RS-422/485 networks. It automatically detects and manages data direction in RS-485 mode, ensuring seamless half-duplex communication without software intervention.
Operation Modes:
- RS-422 Mode (4-wire full duplex): Supports simultaneous bidirectional communication with separate transmit and receive pairs.
- RS-485 Mode (2-wire half duplex): Uses a single differential pair for both transmission and reception, with automatic or RTS-based direction control.
Use Cases:
- Industrial automation systems
- Factory data acquisition networks
- Building management and security systems
- Remote device monitoring and control
- SCADA and telemetry applications
Compatibility:
- Compatible with standard RS-232 DTE/DCE devices
- Supports connection to RS-422/485 field devices such as sensors, controllers, and HMIs
- Works with Moxa and third-party serial communication software
### 5. Components & Accessories
Included Items:
- A52-230 converter unit
- RJ11 to DB9F or DB25F cable (optional DB9M/DB25M)
- 230 VAC power adapter (9 VDC output)
- Mounting kit (plastic plates and screws)
- User manual
Optional Accessories:
- Additional power adapters (UL/TUV certified)
- RJ45-to-terminal block adapters
- Extended-length serial cables
- DIN-rail mounting brackets (optional third-party accessory)
Connectors:
- RS-232 Side: RJ45 connector (supports DTE/DCE pinouts)
- RS-422/485 Side: RJ45 or 6-pin terminal block
- Power Input: Barrel jack or terminal block pins 6 (GND) and 7 (VCC)
### 6. Installation & Setup
Physical Installation:
- Mount the converter using the included plastic plates and screws on a wall or flat surface.
- Ensure adequate ventilation and avoid exposure to excessive heat or vibration.
Electrical Connections:
1. Connect the RS-232 port to the host device using the supplied RJ11-to-DB9/DB25 cable.
2. Connect the RS-422/485 port to the target device or network using twisted-pair shielded cable.
3. Connect the power supply (9–30 VDC) via the barrel jack or terminal block.
Configuration:
- Remove the top cover to access DIP switches and jumpers.
- SW1: Select RS-422 (OFF) or RS-485 (ON) mode.
- SW2: Select RTS control (OFF) or ADDC automatic control (ON).
- Jumper: Enable or disable 120 Ω termination resistor for RS-485 mode.
LED Indicators:
- PWR: Power ON indicator (red)
- TxD: Data transmission from RS-232 to RS-422/485
- RxD: Data reception from RS-422/485 to RS-232
- RTS/CTS: Flow control signal indicators
Power Requirements:
- Input voltage: +9 to +30 VDC (typical +24 VDC industrial supply)
- Optional external adapter: 9 VDC 1.5 A (supports up to 4 converters)
### 7. Performance & Capabilities
- Data Rate: Up to 921.6 kbps, supporting high-speed serial communication.
- Transmission Distance: Up to 1.2 km (RS-485 multi-drop).
- Device Capacity: Supports up to 32 nodes on a single RS-485 bus.
- Signal Integrity: Built-in TVS protection ensures stable operation in noisy industrial environments.
- Power Efficiency: Low power consumption (157 mA @ 9 VDC).
- Reliability: Designed for continuous operation in industrial control systems.
- Limitations:
- Optical isolation not included in A52 (available in A53).
- Operating temperature limited to 0–55°C (not suitable for extreme outdoor environments).
### 8. Standards & Compliance
- Certifications: CE approved
- Safety Standards: UL/TUV certified power adapter
- EMC Protection:
- ESD protection up to 8 kV (contact discharge)
- EFT protection up to 2 kV
- Isolation (A53 variant): 2 kV DC optical isolation
- Environmental Compliance: RoHS-compliant materials and construction
- Industry Standards:
- RS-232 (EIA/TIA-232)
- RS-422 (EIA/TIA-422)
- RS-485 (EIA/TIA-485)
### 9. Additional Information
Warranty:
Standard manufacturer warranty provided by Moxa Technologies (typically 3 years, depending on region and distributor).
Support & Documentation:
- Comprehensive user manual available from Moxa’s official website.
- Technical support via Moxa’s global service network.
- Firmware and documentation updates accessible online.
Maintenance:
- No periodic maintenance required beyond ensuring clean connectors and stable power supply.
- Recommended to inspect cabling and grounding periodically in industrial environments.
Product Lifecycle & Updates:
- The A52-230 remains part of Moxa’s long-term support product line, ensuring availability of replacement parts and accessories.
- Compatible with Moxa’s serial communication utilities and diagnostic tools.
### Summary
The Moxa Transio A52-230 is a compact, reliable, and intelligent RS-232 to RS-422/485 converter engineered for industrial and automation environments. It provides seamless bidirectional communication between legacy serial interfaces and modern differential networks, supporting high-speed data rates up to 921.6 kbps. With its Automatic Data Direction Control (ADDC), TVS protection, and multi-drop capability, the A52-230 simplifies integration, reduces software complexity, and enhances communication reliability.
Its flexible power input range (9–30 VDC), selectable operation modes, and LED diagnostics make it ideal for factory automation, building control, remote monitoring, and data acquisition systems. The device’s robust design, CE certification, and Moxa’s proven reliability ensure long-term performance in demanding industrial applications.
Manufacturer: Moxa Technologies Co., Ltd.
Website: [www.moxa.com](https://www.moxa.com)
Part Number: 18020005210
Printed in Taiwan
Edition: 1st Edition, April 2000
In summary, the Moxa Transio A52-230 offers a complete, industrial-grade solution for serial communication conversion, combining high-speed performance, intelligent control, and rugged reliability in a compact, easy-to-install package.
### 1. Product Overview
Product Name: Transio A52-230
Model: A52-230
Series: Transio A52/53 Series
Article Number: A52-230
Manufacturer: Moxa Technologies Co., Ltd.
Product Type: RS-232 to RS-422/485 External Converter with RJ11 Cable
Category: Serial Communication Interface Conversion Device
Power Supply: 230 VAC external power adapter (included)
The Moxa Transio A52-230 is a high-performance, bidirectional serial communication converter designed to bridge RS-232 interfaces with RS-422 or RS-485 networks. It enables reliable data transmission between legacy serial devices and modern industrial communication systems. The A52-230 model is part of Moxa’s Transio A52/53 series, known for robust design, automatic data direction control, and high-speed operation up to 921.6 kbps.
### 2. Key Features
- Bidirectional Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, allowing seamless communication between different serial standards.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow in RS-485 half-duplex mode, eliminating the need for software-based control or manual RTS toggling.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support:
- RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422: TxD±, RxD±, RTS±, CTS±, GND
- RS-485: Data±, GND
- LED Indicators: Five LEDs display power and signal status for TxD, RxD, RTS, CTS, and PWR, providing real-time communication diagnostics.
- Protection Features:
- TVS protection for all RS-422/485 signals (ESD 8 kV, EFT 2 kV)
- Overload protection for shorted signal lines
- Optical isolation (2 kV DC) available on A53 variant
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 devices in RS-485 multi-drop configuration over distances up to 1.2 km.
- Power Flexibility: Operates from +9 VDC to +30 VDC, compatible with industrial 24 VDC systems.
- Compact and Lightweight: Designed for easy integration in control panels or field installations.
- CE Certified: Meets European safety and EMC standards.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Model | A52-230 |
| Interface Conversion | RS-232 ↔ RS-422/485 |
| Baud Rate | Up to 921.6 kbps |
| RS-232 Connector | RJ45 (with optional RJ11 to DB9/DB25 cable) |
| RS-422/485 Connector | RJ45 or 6-pin terminal block |
| Signal Lines (RS-232) | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND |
| Signal Lines (RS-422) | TxD±, RxD±, RTS±, CTS±, GND |
| Signal Lines (RS-485) | Data±, GND |
| Protection | TVS (ESD 8 kV, EFT 2 kV) |
| Optical Isolation | None (A52); 2 kV DC (A53) |
| Termination Resistor | 120 Ω selectable (jumper) |
| Power Input | +9 VDC to +30 VDC |
| Power Consumption | 157 mA max @ +9 VDC |
| External Adapter | 9 V 1.5 A UL/TUV 110/230 VAC (supports up to 4 units) |
| Dimensions | 90 mm (L) × 60 mm (W) × 21 mm (H) |
| Weight | 76 g |
| Operating Temperature | 0°C to 55°C |
| Mounting Options | Wall or surface mount (plastic plates and screws included) |
| Compliance | CE approved |
| Cable Options | RJ11 to DB9F or DB25F (optional DB9M/DB25M) |
### 4. Functionality
The A52-230 functions as a transparent serial converter, enabling communication between RS-232-based devices (e.g., PCs, PLCs, or controllers) and RS-422/485 networks. It automatically detects and manages data direction in RS-485 mode, ensuring seamless half-duplex communication without software intervention.
Operation Modes:
- RS-422 Mode (4-wire full duplex): Supports simultaneous bidirectional communication with separate transmit and receive pairs.
- RS-485 Mode (2-wire half duplex): Uses a single differential pair for both transmission and reception, with automatic or RTS-based direction control.
Use Cases:
- Industrial automation systems
- Factory data acquisition networks
- Building management and security systems
- Remote device monitoring and control
- SCADA and telemetry applications
Compatibility:
- Compatible with standard RS-232 DTE/DCE devices
- Supports connection to RS-422/485 field devices such as sensors, controllers, and HMIs
- Works with Moxa and third-party serial communication software
### 5. Components & Accessories
Included Items:
- A52-230 converter unit
- RJ11 to DB9F or DB25F cable (optional DB9M/DB25M)
- 230 VAC power adapter (9 VDC output)
- Mounting kit (plastic plates and screws)
- User manual
Optional Accessories:
- Additional power adapters (UL/TUV certified)
- RJ45-to-terminal block adapters
- Extended-length serial cables
- DIN-rail mounting brackets (optional third-party accessory)
Connectors:
- RS-232 Side: RJ45 connector (supports DTE/DCE pinouts)
- RS-422/485 Side: RJ45 or 6-pin terminal block
- Power Input: Barrel jack or terminal block pins 6 (GND) and 7 (VCC)
### 6. Installation & Setup
Physical Installation:
- Mount the converter using the included plastic plates and screws on a wall or flat surface.
- Ensure adequate ventilation and avoid exposure to excessive heat or vibration.
Electrical Connections:
1. Connect the RS-232 port to the host device using the supplied RJ11-to-DB9/DB25 cable.
2. Connect the RS-422/485 port to the target device or network using twisted-pair shielded cable.
3. Connect the power supply (9–30 VDC) via the barrel jack or terminal block.
Configuration:
- Remove the top cover to access DIP switches and jumpers.
- SW1: Select RS-422 (OFF) or RS-485 (ON) mode.
- SW2: Select RTS control (OFF) or ADDC automatic control (ON).
- Jumper: Enable or disable 120 Ω termination resistor for RS-485 mode.
LED Indicators:
- PWR: Power ON indicator (red)
- TxD: Data transmission from RS-232 to RS-422/485
- RxD: Data reception from RS-422/485 to RS-232
- RTS/CTS: Flow control signal indicators
Power Requirements:
- Input voltage: +9 to +30 VDC (typical +24 VDC industrial supply)
- Optional external adapter: 9 VDC 1.5 A (supports up to 4 converters)
### 7. Performance & Capabilities
- Data Rate: Up to 921.6 kbps, supporting high-speed serial communication.
- Transmission Distance: Up to 1.2 km (RS-485 multi-drop).
- Device Capacity: Supports up to 32 nodes on a single RS-485 bus.
- Signal Integrity: Built-in TVS protection ensures stable operation in noisy industrial environments.
- Power Efficiency: Low power consumption (157 mA @ 9 VDC).
- Reliability: Designed for continuous operation in industrial control systems.
- Limitations:
- Optical isolation not included in A52 (available in A53).
- Operating temperature limited to 0–55°C (not suitable for extreme outdoor environments).
### 8. Standards & Compliance
- Certifications: CE approved
- Safety Standards: UL/TUV certified power adapter
- EMC Protection:
- ESD protection up to 8 kV (contact discharge)
- EFT protection up to 2 kV
- Isolation (A53 variant): 2 kV DC optical isolation
- Environmental Compliance: RoHS-compliant materials and construction
- Industry Standards:
- RS-232 (EIA/TIA-232)
- RS-422 (EIA/TIA-422)
- RS-485 (EIA/TIA-485)
### 9. Additional Information
Warranty:
Standard manufacturer warranty provided by Moxa Technologies (typically 3 years, depending on region and distributor).
Support & Documentation:
- Comprehensive user manual available from Moxa’s official website.
- Technical support via Moxa’s global service network.
- Firmware and documentation updates accessible online.
Maintenance:
- No periodic maintenance required beyond ensuring clean connectors and stable power supply.
- Recommended to inspect cabling and grounding periodically in industrial environments.
Product Lifecycle & Updates:
- The A52-230 remains part of Moxa’s long-term support product line, ensuring availability of replacement parts and accessories.
- Compatible with Moxa’s serial communication utilities and diagnostic tools.
### Summary
The Moxa Transio A52-230 is a compact, reliable, and intelligent RS-232 to RS-422/485 converter engineered for industrial and automation environments. It provides seamless bidirectional communication between legacy serial interfaces and modern differential networks, supporting high-speed data rates up to 921.6 kbps. With its Automatic Data Direction Control (ADDC), TVS protection, and multi-drop capability, the A52-230 simplifies integration, reduces software complexity, and enhances communication reliability.
Its flexible power input range (9–30 VDC), selectable operation modes, and LED diagnostics make it ideal for factory automation, building control, remote monitoring, and data acquisition systems. The device’s robust design, CE certification, and Moxa’s proven reliability ensure long-term performance in demanding industrial applications.
Manufacturer: Moxa Technologies Co., Ltd.
Website: [www.moxa.com](https://www.moxa.com)
Part Number: 18020005210
Printed in Taiwan
Edition: 1st Edition, April 2000
In summary, the Moxa Transio A52-230 offers a complete, industrial-grade solution for serial communication conversion, combining high-speed performance, intelligent control, and rugged reliability in a compact, easy-to-install package.
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