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- Bidirectional Serial Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, enabling communication between legacy serial devices and modern industrial control systems.
- 2kV Optical Isolation: Provides galvanic isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops, surges, and electrical noise.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in intelligence automatically manages data flow direction in RS-485 half-duplex mode, eliminating the need for software-based control or RTS signal management.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via internal DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support: RS-232 interface supports TxD, RxD, RTS, CTS, DTR, DSR, DCD, and GND signals; RS-422/485 interfaces support differential signal pairs for data and control lines.
- LED Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and communication activity.
- Robust Protection: TVS protection on all RS-422/485 lines (ESD up to 8 kV, EFT up to 2 kV) and overload protection for shorted signal lines.
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- Wide Power Input Range: Accepts DC power from +9V to +30V; includes 230 VAC power adapter.
- Compact and Lightweight: Small form factor (90 × 60 × 21 mm) and lightweight (80 g) for easy installation in space-constrained environments.
- Industrial Reliability: Designed for harsh environments with CE approval and high immunity to electrical interference.
- 2kV Optical Isolation: Provides galvanic isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops, surges, and electrical noise.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in intelligence automatically manages data flow direction in RS-485 half-duplex mode, eliminating the need for software-based control or RTS signal management.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via internal DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support: RS-232 interface supports TxD, RxD, RTS, CTS, DTR, DSR, DCD, and GND signals; RS-422/485 interfaces support differential signal pairs for data and control lines.
- LED Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and communication activity.
- Robust Protection: TVS protection on all RS-422/485 lines (ESD up to 8 kV, EFT up to 2 kV) and overload protection for shorted signal lines.
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- Wide Power Input Range: Accepts DC power from +9V to +30V; includes 230 VAC power adapter.
- Compact and Lightweight: Small form factor (90 × 60 × 21 mm) and lightweight (80 g) for easy installation in space-constrained environments.
- Industrial Reliability: Designed for harsh environments with CE approval and high immunity to electrical interference.
1. Product Overview
Product Name: Transio A53-230
Model: A53-230
Series: Transio A52/A53 Series
Article Number: A53-230
Manufacturer: Moxa Technologies Co., Ltd.
Product Type: RS-232 to RS-422/485 isolated 2kV bidirectional converter
Description: The Moxa Transio A53-230 is an industrial-grade, isolated RS-232 to RS-422/485 converter designed to provide reliable serial communication conversion with 2kV optical isolation. It supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, with automatic data direction control and high-speed operation up to 921.6 kbps. The converter is externally powered (230 VAC adapter included) and features LED indicators for power and signal states, robust ESD and surge protection, and flexible mounting options for industrial environments.
2. Key Features
- Bidirectional Serial Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, enabling communication between legacy serial devices and modern industrial control systems.
- 2kV Optical Isolation: Provides galvanic isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops, surges, and electrical noise.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in intelligence automatically manages data flow direction in RS-485 half-duplex mode, eliminating the need for software-based control or RTS signal management.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via internal DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support: RS-232 interface supports TxD, RxD, RTS, CTS, DTR, DSR, DCD, and GND signals; RS-422/485 interfaces support differential signal pairs for data and control lines.
- LED Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and communication activity.
- Robust Protection: TVS protection on all RS-422/485 lines (ESD up to 8 kV, EFT up to 2 kV) and overload protection for shorted signal lines.
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- Wide Power Input Range: Accepts DC power from +9V to +30V; includes 230 VAC power adapter.
- Compact and Lightweight: Small form factor (90 × 60 × 21 mm) and lightweight (80 g) for easy installation in space-constrained environments.
- Industrial Reliability: Designed for harsh environments with CE approval and high immunity to electrical interference.
3. Technical Specifications
- Serial Interfaces:
- RS-232 (RJ45 connector)
- RS-422/485 (RJ45 or 6-pin terminal block connector)
- Supported Signals:
- RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422: TxD+(B)/–(A), RxD+(B)/–(A), RTS+(B)/–(A), CTS+(B)/–(A), GND
- RS-485: Data+(B)/–(A), GND
- Baud Rate: Up to 921.6 kbps (auto-detect, no switch setting required)
- Isolation: 2 kV DC optical isolation (A53 model only)
- Protection:
- TVS protection on all RS-422/485 signals
- ESD protection: ±8 kV
- EFT protection: ±2 kV
- Overload protection for shorted signal lines
- Termination: 120 Ω termination resistor (jumper selectable in RS-485 mode)
- Power Supply:
- Input voltage: +9V to +30V DC
- Power consumption: 270 mA max @ +9V (A53)
- External adapter: 9V 1.5A UL/TUV 110V/230V (included)
- One adapter can power up to four converters
- Environmental:
- Operating temperature: 0°C to 55°C
- Storage temperature: -20°C to 70°C
- Relative humidity: 5% to 95% (non-condensing)
- Physical:
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: 80 g
- Enclosure: Rugged plastic housing
- Mounting: Wall or surface mount (mounting kit included)
- Compliance: CE approved
4. Functionality
The A53-230 functions as a transparent, bidirectional converter between RS-232 and RS-422/485 serial communication standards. It enables a host device (such as a PC, PLC, or controller) with an RS-232 interface to communicate with remote devices using RS-422 or RS-485 differential signaling.
Operation Modes:
- RS-422 Mode (4-wire full duplex): Supports simultaneous transmission and reception, suitable for point-to-point or multi-drop communication with hardware flow control (RTS/CTS).
- RS-485 Mode (2-wire half duplex): Supports multi-drop communication with up to 32 devices on a single bus. Data direction is automatically managed by the ADDC circuit or manually controlled via RTS signal.
Automatic Data Direction Control (ADDC):
In RS-485 mode, the converter automatically detects data transmission and switches the transceiver direction accordingly, eliminating the need for software-based control or timing adjustments.
Applications:
- Factory automation and process control
- Building management and security systems
- Remote data acquisition and telemetry
- Industrial monitoring and SCADA systems
- Serial device networking and integration
Compatibility:
Compatible with standard RS-232, RS-422, and RS-485 devices, including PLCs, sensors, controllers, and industrial PCs. Supports both DTE and DCE configurations via RJ45-to-DB9/DB25 adapters.
5. Components & Accessories
Included Items:
- A53-230 converter unit
- 230 VAC to 9V DC power adapter (UL/TUV certified)
- Mounting kit (plastic plates and screws)
- User manual
Connectors:
- RS-232: RJ45 connector
- RS-422/485: RJ45 or 6-pin terminal block
- Power input: Barrel jack or terminal block (pins 6 = GND, 7 = +VCC)
Optional Accessories:
- RJ45-to-DB9 or RJ45-to-DB25 adapter cables for DTE/DCE connection
- Additional power adapters for multi-unit setups
- DIN-rail mounting brackets (optional third-party accessory)
6. Installation & Setup
Mounting:
The converter can be mounted on a wall or flat surface using the included plastic plates and screws. Ensure adequate ventilation and avoid exposure to excessive heat or moisture.
Power Connection:
Connect the supplied 9V DC adapter to the power jack, or alternatively, supply +9V to +30V DC via the terminal block (Pin 7 = VCC, Pin 6 = GND). Do not confuse signal ground (SG) with power ground.
Mode Configuration:
To configure operation mode, remove the top cover (secured by two screws) to access DIP switches and jumpers.
- SW1: RS-422 (OFF) / RS-485 (ON, default)
- SW2: RTS control (OFF) / ADDC automatic control (ON, default)
- Jumper: Enables/disables 120 Ω termination resistor in RS-485 mode
LED Indicators:
- PWR: Illuminates red when power is applied
- TxD: Red when transmitting data from RS-232 to RS-422/485
- RxD: Red when receiving data from RS-422/485 to RS-232
- RTS: Red when RS-232 RTS signal is active
- CTS: Red when RS-232 CTS signal is active
Wiring Guidelines:
- Use twisted-pair shielded cable for RS-422/485 connections to minimize noise.
- Maintain proper polarity for differential pairs (A/B).
- For RS-485 networks, terminate both ends of the bus with 120 Ω resistors if required.
- Ensure all devices share a common signal ground (SG).
7. Performance & Capabilities
- Data Rate: Up to 921.6 kbps, supporting both low-speed and high-speed serial communication.
- Transmission Distance: Up to 1.2 km (RS-422/485) using standard twisted-pair cable.
- Device Capacity: Supports up to 32 RS-485 nodes in a multi-drop configuration.
- Isolation Voltage: 2 kV DC optical isolation between RS-232 and RS-422/485 ports.
- Power Efficiency: Low power consumption (270 mA @ 9V).
- Signal Integrity: TVS and ESD protection ensure stable operation in electrically noisy environments.
- Reliability: Designed for continuous operation in industrial automation systems.
Limitations:
- Not suitable for environments exceeding 55°C ambient temperature.
- Requires external power supply; not bus-powered.
- Limited to 32 devices per RS-485 segment (standard limitation).
8. Standards & Compliance
- Electrical Safety: UL/TUV certified power adapter
- EMC Compliance: CE approved
- ESD Protection: ±8 kV (contact discharge)
- EFT/Surge Protection: ±2 kV
- Isolation: 2 kV DC optical isolation (A53 model)
- Industry Standards:
- RS-232 (EIA/TIA-232)
- RS-422 (EIA/TIA-422)
- RS-485 (EIA/TIA-485)
The A53-230 meets industrial communication and safety standards, ensuring interoperability and reliability in professional automation systems.
9. Additional Information
Warranty:
Standard manufacturer’s warranty (typically 2 years, per Moxa policy) covering defects in materials and workmanship.
Support:
Technical documentation, wiring diagrams, and firmware updates available at [www.moxa.com](https://www.moxa.com). Moxa provides global technical support and RMA services.
Maintenance:
- Periodically inspect connectors and cables for wear or corrosion.
- Ensure proper grounding and shielding in high-noise environments.
- Clean the enclosure with a dry cloth; avoid solvents or liquids.
Firmware/Software Updates:
The A53-230 operates as a hardware-level converter and does not require firmware updates or drivers. It is fully transparent to communication protocols.
Service Life & Reliability:
Designed for long-term industrial operation with high MTBF (Mean Time Between Failures). The optical isolation and surge protection extend equipment lifespan and reduce downtime.
Summary
The Moxa Transio A53-230 is a robust, high-performance RS-232 to RS-422/485 converter engineered for industrial automation and control applications. It combines 2kV optical isolation, automatic data direction control, and high-speed operation in a compact, easy-to-install form factor. With comprehensive protection features, flexible configuration options, and compatibility with a wide range of serial devices, the A53-230 ensures reliable, interference-free communication across extended distances. Its CE certification, wide power input range, and rugged design make it an ideal choice for demanding industrial environments requiring dependable serial connectivity and electrical isolation.
Product Name: Transio A53-230
Model: A53-230
Series: Transio A52/A53 Series
Article Number: A53-230
Manufacturer: Moxa Technologies Co., Ltd.
Product Type: RS-232 to RS-422/485 isolated 2kV bidirectional converter
Description: The Moxa Transio A53-230 is an industrial-grade, isolated RS-232 to RS-422/485 converter designed to provide reliable serial communication conversion with 2kV optical isolation. It supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, with automatic data direction control and high-speed operation up to 921.6 kbps. The converter is externally powered (230 VAC adapter included) and features LED indicators for power and signal states, robust ESD and surge protection, and flexible mounting options for industrial environments.
2. Key Features
- Bidirectional Serial Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, enabling communication between legacy serial devices and modern industrial control systems.
- 2kV Optical Isolation: Provides galvanic isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops, surges, and electrical noise.
- High-Speed Data Transmission: Supports baud rates up to 921.6 kbps without requiring manual switch configuration.
- Automatic Data Direction Control (ADDC): Built-in intelligence automatically manages data flow direction in RS-485 half-duplex mode, eliminating the need for software-based control or RTS signal management.
- Selectable Operation Modes: Supports both 4-wire full-duplex RS-422 and 2-wire half-duplex RS-485 modes, selectable via internal DIP switches.
- Flexible Control Options: RS-485 data direction can be controlled automatically (ADDC) or manually via RTS signal.
- Comprehensive Signal Support: RS-232 interface supports TxD, RxD, RTS, CTS, DTR, DSR, DCD, and GND signals; RS-422/485 interfaces support differential signal pairs for data and control lines.
- LED Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and communication activity.
- Robust Protection: TVS protection on all RS-422/485 lines (ESD up to 8 kV, EFT up to 2 kV) and overload protection for shorted signal lines.
- Built-in Termination: Integrated 120 Ω termination resistor selectable via jumper for RS-485 mode.
- Multi-Drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- Wide Power Input Range: Accepts DC power from +9V to +30V; includes 230 VAC power adapter.
- Compact and Lightweight: Small form factor (90 × 60 × 21 mm) and lightweight (80 g) for easy installation in space-constrained environments.
- Industrial Reliability: Designed for harsh environments with CE approval and high immunity to electrical interference.
3. Technical Specifications
- Serial Interfaces:
- RS-232 (RJ45 connector)
- RS-422/485 (RJ45 or 6-pin terminal block connector)
- Supported Signals:
- RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422: TxD+(B)/–(A), RxD+(B)/–(A), RTS+(B)/–(A), CTS+(B)/–(A), GND
- RS-485: Data+(B)/–(A), GND
- Baud Rate: Up to 921.6 kbps (auto-detect, no switch setting required)
- Isolation: 2 kV DC optical isolation (A53 model only)
- Protection:
- TVS protection on all RS-422/485 signals
- ESD protection: ±8 kV
- EFT protection: ±2 kV
- Overload protection for shorted signal lines
- Termination: 120 Ω termination resistor (jumper selectable in RS-485 mode)
- Power Supply:
- Input voltage: +9V to +30V DC
- Power consumption: 270 mA max @ +9V (A53)
- External adapter: 9V 1.5A UL/TUV 110V/230V (included)
- One adapter can power up to four converters
- Environmental:
- Operating temperature: 0°C to 55°C
- Storage temperature: -20°C to 70°C
- Relative humidity: 5% to 95% (non-condensing)
- Physical:
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: 80 g
- Enclosure: Rugged plastic housing
- Mounting: Wall or surface mount (mounting kit included)
- Compliance: CE approved
4. Functionality
The A53-230 functions as a transparent, bidirectional converter between RS-232 and RS-422/485 serial communication standards. It enables a host device (such as a PC, PLC, or controller) with an RS-232 interface to communicate with remote devices using RS-422 or RS-485 differential signaling.
Operation Modes:
- RS-422 Mode (4-wire full duplex): Supports simultaneous transmission and reception, suitable for point-to-point or multi-drop communication with hardware flow control (RTS/CTS).
- RS-485 Mode (2-wire half duplex): Supports multi-drop communication with up to 32 devices on a single bus. Data direction is automatically managed by the ADDC circuit or manually controlled via RTS signal.
Automatic Data Direction Control (ADDC):
In RS-485 mode, the converter automatically detects data transmission and switches the transceiver direction accordingly, eliminating the need for software-based control or timing adjustments.
Applications:
- Factory automation and process control
- Building management and security systems
- Remote data acquisition and telemetry
- Industrial monitoring and SCADA systems
- Serial device networking and integration
Compatibility:
Compatible with standard RS-232, RS-422, and RS-485 devices, including PLCs, sensors, controllers, and industrial PCs. Supports both DTE and DCE configurations via RJ45-to-DB9/DB25 adapters.
5. Components & Accessories
Included Items:
- A53-230 converter unit
- 230 VAC to 9V DC power adapter (UL/TUV certified)
- Mounting kit (plastic plates and screws)
- User manual
Connectors:
- RS-232: RJ45 connector
- RS-422/485: RJ45 or 6-pin terminal block
- Power input: Barrel jack or terminal block (pins 6 = GND, 7 = +VCC)
Optional Accessories:
- RJ45-to-DB9 or RJ45-to-DB25 adapter cables for DTE/DCE connection
- Additional power adapters for multi-unit setups
- DIN-rail mounting brackets (optional third-party accessory)
6. Installation & Setup
Mounting:
The converter can be mounted on a wall or flat surface using the included plastic plates and screws. Ensure adequate ventilation and avoid exposure to excessive heat or moisture.
Power Connection:
Connect the supplied 9V DC adapter to the power jack, or alternatively, supply +9V to +30V DC via the terminal block (Pin 7 = VCC, Pin 6 = GND). Do not confuse signal ground (SG) with power ground.
Mode Configuration:
To configure operation mode, remove the top cover (secured by two screws) to access DIP switches and jumpers.
- SW1: RS-422 (OFF) / RS-485 (ON, default)
- SW2: RTS control (OFF) / ADDC automatic control (ON, default)
- Jumper: Enables/disables 120 Ω termination resistor in RS-485 mode
LED Indicators:
- PWR: Illuminates red when power is applied
- TxD: Red when transmitting data from RS-232 to RS-422/485
- RxD: Red when receiving data from RS-422/485 to RS-232
- RTS: Red when RS-232 RTS signal is active
- CTS: Red when RS-232 CTS signal is active
Wiring Guidelines:
- Use twisted-pair shielded cable for RS-422/485 connections to minimize noise.
- Maintain proper polarity for differential pairs (A/B).
- For RS-485 networks, terminate both ends of the bus with 120 Ω resistors if required.
- Ensure all devices share a common signal ground (SG).
7. Performance & Capabilities
- Data Rate: Up to 921.6 kbps, supporting both low-speed and high-speed serial communication.
- Transmission Distance: Up to 1.2 km (RS-422/485) using standard twisted-pair cable.
- Device Capacity: Supports up to 32 RS-485 nodes in a multi-drop configuration.
- Isolation Voltage: 2 kV DC optical isolation between RS-232 and RS-422/485 ports.
- Power Efficiency: Low power consumption (270 mA @ 9V).
- Signal Integrity: TVS and ESD protection ensure stable operation in electrically noisy environments.
- Reliability: Designed for continuous operation in industrial automation systems.
Limitations:
- Not suitable for environments exceeding 55°C ambient temperature.
- Requires external power supply; not bus-powered.
- Limited to 32 devices per RS-485 segment (standard limitation).
8. Standards & Compliance
- Electrical Safety: UL/TUV certified power adapter
- EMC Compliance: CE approved
- ESD Protection: ±8 kV (contact discharge)
- EFT/Surge Protection: ±2 kV
- Isolation: 2 kV DC optical isolation (A53 model)
- Industry Standards:
- RS-232 (EIA/TIA-232)
- RS-422 (EIA/TIA-422)
- RS-485 (EIA/TIA-485)
The A53-230 meets industrial communication and safety standards, ensuring interoperability and reliability in professional automation systems.
9. Additional Information
Warranty:
Standard manufacturer’s warranty (typically 2 years, per Moxa policy) covering defects in materials and workmanship.
Support:
Technical documentation, wiring diagrams, and firmware updates available at [www.moxa.com](https://www.moxa.com). Moxa provides global technical support and RMA services.
Maintenance:
- Periodically inspect connectors and cables for wear or corrosion.
- Ensure proper grounding and shielding in high-noise environments.
- Clean the enclosure with a dry cloth; avoid solvents or liquids.
Firmware/Software Updates:
The A53-230 operates as a hardware-level converter and does not require firmware updates or drivers. It is fully transparent to communication protocols.
Service Life & Reliability:
Designed for long-term industrial operation with high MTBF (Mean Time Between Failures). The optical isolation and surge protection extend equipment lifespan and reduce downtime.
Summary
The Moxa Transio A53-230 is a robust, high-performance RS-232 to RS-422/485 converter engineered for industrial automation and control applications. It combines 2kV optical isolation, automatic data direction control, and high-speed operation in a compact, easy-to-install form factor. With comprehensive protection features, flexible configuration options, and compatibility with a wide range of serial devices, the A53-230 ensures reliable, interference-free communication across extended distances. Its CE certification, wide power input range, and rugged design make it an ideal choice for demanding industrial environments requiring dependable serial connectivity and electrical isolation.
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