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- Bi-directional 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.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow direction in RS-485 half-duplex communication, eliminating the need for manual RTS control or baud rate configuration.
- High-Speed Data Transmission: Supports baud rates up to 921.6 Kbps without requiring switch settings, ensuring fast and stable communication.
- Optical Isolation (A53 only): Provides 2 kV DC optical isolation on all RS-422/485 signal lines, protecting connected equipment from ground loops and electrical surges.
- Robust Electrical Protection:
- TVS (Transient Voltage Suppression) protection on all RS-422/485 signals.
- ESD protection up to 25 kV (contact discharge).
- EFT (Electrical Fast Transient) protection up to 2 kV.
- Overload protection for shorted signal lines.
- Flexible Interface Options:
- RS-232 via RJ45 connector.
- RS-422/485 via RJ45 or terminal block connector.
- LED Status Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and signal activity.
- Wide Power Input Range: Operates from +9 VDC to +30 VDC, compatible with standard industrial 24 VDC power systems.
- Compact and Durable Design: Small form factor (90 × 60 × 21 mm) with wall-mounting capability for easy integration into control panels or enclosures.
- Multi-drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- CE Certified: Meets European safety and EMC standards for industrial communication equipment.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow direction in RS-485 half-duplex communication, eliminating the need for manual RTS control or baud rate configuration.
- High-Speed Data Transmission: Supports baud rates up to 921.6 Kbps without requiring switch settings, ensuring fast and stable communication.
- Optical Isolation (A53 only): Provides 2 kV DC optical isolation on all RS-422/485 signal lines, protecting connected equipment from ground loops and electrical surges.
- Robust Electrical Protection:
- TVS (Transient Voltage Suppression) protection on all RS-422/485 signals.
- ESD protection up to 25 kV (contact discharge).
- EFT (Electrical Fast Transient) protection up to 2 kV.
- Overload protection for shorted signal lines.
- Flexible Interface Options:
- RS-232 via RJ45 connector.
- RS-422/485 via RJ45 or terminal block connector.
- LED Status Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and signal activity.
- Wide Power Input Range: Operates from +9 VDC to +30 VDC, compatible with standard industrial 24 VDC power systems.
- Compact and Durable Design: Small form factor (90 × 60 × 21 mm) with wall-mounting capability for easy integration into control panels or enclosures.
- Multi-drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- CE Certified: Meets European safety and EMC standards for industrial communication equipment.
Comprehensive Product Summary – Moxa Transio A53 RS-232 to RS-422/485 Isolated Converter (Article A53)
### 1. Product Overview
Product Name: Transio A53
Model: A53-230 (without power supply)
Series: Transio A52/A53 Smart RS-232 to RS-422/485 Bi-directional Converter Series
Article Number: A53
Manufacturer: Moxa Technologies Co., Ltd.
Product Type: RS-232 to RS-422/485 isolated converter (bi-directional)
Description: The Moxa Transio A53 is an intelligent, industrial-grade RS-232 to RS-422/485 converter designed to provide reliable, isolated serial communication between devices using different interface standards. It supports automatic data direction control, high-speed data transmission, and robust protection features suitable for harsh industrial environments.
### 2. Key Features
- Bi-directional 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.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow direction in RS-485 half-duplex communication, eliminating the need for manual RTS control or baud rate configuration.
- High-Speed Data Transmission: Supports baud rates up to 921.6 Kbps without requiring switch settings, ensuring fast and stable communication.
- Optical Isolation (A53 only): Provides 2 kV DC optical isolation on all RS-422/485 signal lines, protecting connected equipment from ground loops and electrical surges.
- Robust Electrical Protection:
- TVS (Transient Voltage Suppression) protection on all RS-422/485 signals.
- ESD protection up to 25 kV (contact discharge).
- EFT (Electrical Fast Transient) protection up to 2 kV.
- Overload protection for shorted signal lines.
- Flexible Interface Options:
- RS-232 via RJ45 connector.
- RS-422/485 via RJ45 or terminal block connector.
- LED Status Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and signal activity.
- Wide Power Input Range: Operates from +9 VDC to +30 VDC, compatible with standard industrial 24 VDC power systems.
- Compact and Durable Design: Small form factor (90 × 60 × 21 mm) with wall-mounting capability for easy integration into control panels or enclosures.
- Multi-drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- CE Certified: Meets European safety and EMC standards for industrial communication equipment.
### 3. Technical Specifications
Electrical & Interface Specifications:
- Serial Standards: RS-232, RS-422, RS-485
- RS-232 Signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422 Signals: TxD+(B)/–(A), RxD+(B)/–(A), RTS+(B)/–(A), CTS+(B)/–(A), GND
- RS-485 Signals: Data+(B)/–(A), GND
- Baud Rate: Up to 921.6 Kbps (auto-detect, no switch setting required)
- Flow Control: Hardware (RTS/CTS) for RS-422; automatic or RTS-controlled for RS-485
- Isolation: 2 kV DC optical isolation (A53 only)
- Protection:
- ESD: ±25 kV (contact discharge)
- EFT: ±2 kV
- TVS protection on all RS-422/485 lines
- Overload protection for shorted signals
Power Requirements:
- Input Voltage: +9 VDC to +30 VDC
- Power Consumption:
- A52: 157 mA max @ +9 VDC
- A53: 270 mA max @ +9 VDC
- Optional Power Adapter: 9 VDC, 1.5 A UL/TUV certified (110/230 VAC input), capable of powering up to four converters.
Physical Characteristics:
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: Approximately 100 g (typical)
- Material: Industrial-grade plastic enclosure
- Mounting Options: Wall or surface mounting using included plastic plates and screws
Environmental Conditions:
- Operating Temperature: 0°C to 55°C
- Storage Temperature: -20°C to 70°C (typical for Moxa devices)
- Humidity: 5% to 95% RH (non-condensing)
### 4. Functionality
Operational Concept:
The Transio A53 functions as a transparent, bi-directional converter between RS-232 and RS-422/485 interfaces. It allows a host device (e.g., PC, PLC, or controller) with an RS-232 port to communicate with remote devices using RS-422 or RS-485 differential signaling.
Automatic Data Direction Control (ADDC):
In RS-485 half-duplex mode, the A53 automatically detects data transmission and switches the transceiver direction accordingly. This eliminates the need for software-based RTS control, simplifying integration and reducing programming complexity.
Use Cases and Applications:
- Industrial Automation: Connecting PLCs, sensors, and actuators across long distances.
- Factory Data Acquisition: Collecting data from multiple RS-485 devices in a multi-drop configuration.
- Building Automation: Integrating HVAC, lighting, and security systems using serial networks.
- Remote Device Control: Managing serial devices such as meters, controllers, or terminals from a central RS-232 interface.
- Security and Access Control: Linking RS-232-based control systems to RS-485 field devices.
Compatibility:
- Compatible with standard RS-232 DTE/DCE devices (PCs, terminals, modems).
- Supports both 2-wire (RS-485) and 4-wire (RS-422) communication modes.
- Works with standard RJ45-to-DB9 or RJ45-to-DB25 adapters for flexible connectivity.
### 5. Components & Accessories
Included Items:
- A53 converter unit (without power supply)
- Mounting kit (plastic plates and screws)
- User manual and pinout documentation
Optional Accessories:
- 9 VDC / 1.5 A UL/TUV certified power adapter (supports up to four converters)
- RJ45-to-DB9 or RJ45-to-DB25 adapter cables for RS-232 connection
- Terminal block connectors for RS-422/485 wiring
Connectors:
- RS-232 Port: RJ45 connector
- RS-422/485 Port: RJ45 or 7-pin terminal block connector
- Power Input: Barrel jack or terminal block (pins 6 = Power GND, 7 = VCC +9V)
### 6. Installation & Setup
Mounting:
The A53 can be mounted on walls, panels, or any flat surface using the included mounting kit. The compact design allows installation in control cabinets or near field devices.
Configuration:
- Mode Selection: DIP switches inside the unit configure operation mode and control method.
- SW1: RS-422 (Off) / RS-485 (On, default)
- SW2: RTS control (Off) / ADDC automatic control (On, default)
- Termination Resistor: A jumper enables or disables the built-in 120 Ω termination resistor for RS-485 mode.
- Power Connection:
- Via DC power jack or terminal block (9–30 VDC).
- Ensure correct polarity and do not confuse signal ground (SG) with power ground.
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 multi-drop networks, connect up to 32 devices over a maximum distance of 1.2 km.
### 7. Performance & Capabilities
Data Rate and Distance:
- Supports baud rates up to 921.6 Kbps.
- Communication distance up to 1.2 km (RS-485 multi-drop).
Capacity:
- Supports up to 32 RS-485 devices on a single bus.
- Multi-drop operation with automatic data direction control ensures efficient bus utilization.
Efficiency and Reliability:
- ADDC technology ensures seamless half-duplex communication without timing errors.
- Optical isolation (A53) prevents ground potential differences and electrical interference.
- TVS and ESD protection enhance long-term reliability in electrically noisy environments.
Limitations:
- Operating temperature limited to 0–55°C; not suitable for extreme outdoor environments without enclosure protection.
- Requires external DC power supply (not included).
### 8. Standards & Compliance
Certifications:
- CE Approved: Conforms to European EMC and safety directives.
- UL/TUV Power Adapter (optional): Certified for safety and reliability.
Industry Standards:
- Complies with EIA/TIA-232, EIA/TIA-422, and EIA/TIA-485 serial communication standards.
- Meets industrial-grade surge and ESD protection requirements.
Regulatory Compliance:
- Designed and manufactured in accordance with ISO-certified quality management systems.
- Meets electromagnetic compatibility (EMC) and low-voltage directives applicable to industrial communication equipment.
### 9. Additional Information
Warranty:
- Standard Moxa warranty (typically 3 years) covering defects in materials and workmanship.
Technical Support:
- Comprehensive documentation, pinout diagrams, and user manuals available at [www.moxa.com](https://www.moxa.com).
- Global technical support network for configuration, troubleshooting, and firmware updates.
Maintenance:
- No periodic maintenance required beyond ensuring clean connectors and stable power supply.
- Avoid exposure to excessive dust, moisture, or vibration.
Firmware & Updates:
- The A53 operates as a hardware-level converter with no firmware dependency; thus, no software updates are required.
Ordering Information:
- Model: A53-230 (without power supply)
- Optional Accessories:
- Power adapter (9 VDC, 1.5 A, UL/TUV certified)
- RJ45-to-DB9/DB25 adapter cables
- Mounting hardware (included)
Manufacturer Contact:
Moxa Technologies Co., Ltd.
Website: [www.moxa.com](https://www.moxa.com)
Part No.: 18020005210
Printed in Taiwan, 1st Edition, April 2000
### Summary
The Moxa Transio A53 is a robust, intelligent RS-232 to RS-422/485 converter engineered for industrial communication environments requiring electrical isolation and high reliability. Its automatic data direction control, 2 kV optical isolation, and comprehensive surge protection make it ideal for factory automation, building control, and remote data acquisition systems. With support for high-speed data rates, multi-drop networking, and simple configuration, the A53 provides a dependable and maintenance-free solution for extending serial communication networks across long distances and diverse industrial applications.
Key Advantages:
- Seamless RS-232 to RS-422/485 conversion
- Automatic half-duplex control (ADDC)
- 2 kV optical isolation for signal integrity
- Wide 9–30 VDC power input range
- Compact, mountable design with LED diagnostics
- CE certified for industrial use
The Transio A53 exemplifies Moxa’s commitment to reliable, intelligent serial communication solutions for modern industrial automation systems.
### 1. Product Overview
Product Name: Transio A53
Model: A53-230 (without power supply)
Series: Transio A52/A53 Smart RS-232 to RS-422/485 Bi-directional Converter Series
Article Number: A53
Manufacturer: Moxa Technologies Co., Ltd.
Product Type: RS-232 to RS-422/485 isolated converter (bi-directional)
Description: The Moxa Transio A53 is an intelligent, industrial-grade RS-232 to RS-422/485 converter designed to provide reliable, isolated serial communication between devices using different interface standards. It supports automatic data direction control, high-speed data transmission, and robust protection features suitable for harsh industrial environments.
### 2. Key Features
- Bi-directional 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.
- Automatic Data Direction Control (ADDC): Built-in ADDC intelligence automatically manages data flow direction in RS-485 half-duplex communication, eliminating the need for manual RTS control or baud rate configuration.
- High-Speed Data Transmission: Supports baud rates up to 921.6 Kbps without requiring switch settings, ensuring fast and stable communication.
- Optical Isolation (A53 only): Provides 2 kV DC optical isolation on all RS-422/485 signal lines, protecting connected equipment from ground loops and electrical surges.
- Robust Electrical Protection:
- TVS (Transient Voltage Suppression) protection on all RS-422/485 signals.
- ESD protection up to 25 kV (contact discharge).
- EFT (Electrical Fast Transient) protection up to 2 kV.
- Overload protection for shorted signal lines.
- Flexible Interface Options:
- RS-232 via RJ45 connector.
- RS-422/485 via RJ45 or terminal block connector.
- LED Status Indicators: Five LEDs (PWR, TxD, RxD, RTS, CTS) provide real-time status of power and signal activity.
- Wide Power Input Range: Operates from +9 VDC to +30 VDC, compatible with standard industrial 24 VDC power systems.
- Compact and Durable Design: Small form factor (90 × 60 × 21 mm) with wall-mounting capability for easy integration into control panels or enclosures.
- Multi-drop Capability: Supports up to 32 RS-485 devices over a distance of up to 1.2 km.
- CE Certified: Meets European safety and EMC standards for industrial communication equipment.
### 3. Technical Specifications
Electrical & Interface Specifications:
- Serial Standards: RS-232, RS-422, RS-485
- RS-232 Signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
- RS-422 Signals: TxD+(B)/–(A), RxD+(B)/–(A), RTS+(B)/–(A), CTS+(B)/–(A), GND
- RS-485 Signals: Data+(B)/–(A), GND
- Baud Rate: Up to 921.6 Kbps (auto-detect, no switch setting required)
- Flow Control: Hardware (RTS/CTS) for RS-422; automatic or RTS-controlled for RS-485
- Isolation: 2 kV DC optical isolation (A53 only)
- Protection:
- ESD: ±25 kV (contact discharge)
- EFT: ±2 kV
- TVS protection on all RS-422/485 lines
- Overload protection for shorted signals
Power Requirements:
- Input Voltage: +9 VDC to +30 VDC
- Power Consumption:
- A52: 157 mA max @ +9 VDC
- A53: 270 mA max @ +9 VDC
- Optional Power Adapter: 9 VDC, 1.5 A UL/TUV certified (110/230 VAC input), capable of powering up to four converters.
Physical Characteristics:
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: Approximately 100 g (typical)
- Material: Industrial-grade plastic enclosure
- Mounting Options: Wall or surface mounting using included plastic plates and screws
Environmental Conditions:
- Operating Temperature: 0°C to 55°C
- Storage Temperature: -20°C to 70°C (typical for Moxa devices)
- Humidity: 5% to 95% RH (non-condensing)
### 4. Functionality
Operational Concept:
The Transio A53 functions as a transparent, bi-directional converter between RS-232 and RS-422/485 interfaces. It allows a host device (e.g., PC, PLC, or controller) with an RS-232 port to communicate with remote devices using RS-422 or RS-485 differential signaling.
Automatic Data Direction Control (ADDC):
In RS-485 half-duplex mode, the A53 automatically detects data transmission and switches the transceiver direction accordingly. This eliminates the need for software-based RTS control, simplifying integration and reducing programming complexity.
Use Cases and Applications:
- Industrial Automation: Connecting PLCs, sensors, and actuators across long distances.
- Factory Data Acquisition: Collecting data from multiple RS-485 devices in a multi-drop configuration.
- Building Automation: Integrating HVAC, lighting, and security systems using serial networks.
- Remote Device Control: Managing serial devices such as meters, controllers, or terminals from a central RS-232 interface.
- Security and Access Control: Linking RS-232-based control systems to RS-485 field devices.
Compatibility:
- Compatible with standard RS-232 DTE/DCE devices (PCs, terminals, modems).
- Supports both 2-wire (RS-485) and 4-wire (RS-422) communication modes.
- Works with standard RJ45-to-DB9 or RJ45-to-DB25 adapters for flexible connectivity.
### 5. Components & Accessories
Included Items:
- A53 converter unit (without power supply)
- Mounting kit (plastic plates and screws)
- User manual and pinout documentation
Optional Accessories:
- 9 VDC / 1.5 A UL/TUV certified power adapter (supports up to four converters)
- RJ45-to-DB9 or RJ45-to-DB25 adapter cables for RS-232 connection
- Terminal block connectors for RS-422/485 wiring
Connectors:
- RS-232 Port: RJ45 connector
- RS-422/485 Port: RJ45 or 7-pin terminal block connector
- Power Input: Barrel jack or terminal block (pins 6 = Power GND, 7 = VCC +9V)
### 6. Installation & Setup
Mounting:
The A53 can be mounted on walls, panels, or any flat surface using the included mounting kit. The compact design allows installation in control cabinets or near field devices.
Configuration:
- Mode Selection: DIP switches inside the unit configure operation mode and control method.
- SW1: RS-422 (Off) / RS-485 (On, default)
- SW2: RTS control (Off) / ADDC automatic control (On, default)
- Termination Resistor: A jumper enables or disables the built-in 120 Ω termination resistor for RS-485 mode.
- Power Connection:
- Via DC power jack or terminal block (9–30 VDC).
- Ensure correct polarity and do not confuse signal ground (SG) with power ground.
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 multi-drop networks, connect up to 32 devices over a maximum distance of 1.2 km.
### 7. Performance & Capabilities
Data Rate and Distance:
- Supports baud rates up to 921.6 Kbps.
- Communication distance up to 1.2 km (RS-485 multi-drop).
Capacity:
- Supports up to 32 RS-485 devices on a single bus.
- Multi-drop operation with automatic data direction control ensures efficient bus utilization.
Efficiency and Reliability:
- ADDC technology ensures seamless half-duplex communication without timing errors.
- Optical isolation (A53) prevents ground potential differences and electrical interference.
- TVS and ESD protection enhance long-term reliability in electrically noisy environments.
Limitations:
- Operating temperature limited to 0–55°C; not suitable for extreme outdoor environments without enclosure protection.
- Requires external DC power supply (not included).
### 8. Standards & Compliance
Certifications:
- CE Approved: Conforms to European EMC and safety directives.
- UL/TUV Power Adapter (optional): Certified for safety and reliability.
Industry Standards:
- Complies with EIA/TIA-232, EIA/TIA-422, and EIA/TIA-485 serial communication standards.
- Meets industrial-grade surge and ESD protection requirements.
Regulatory Compliance:
- Designed and manufactured in accordance with ISO-certified quality management systems.
- Meets electromagnetic compatibility (EMC) and low-voltage directives applicable to industrial communication equipment.
### 9. Additional Information
Warranty:
- Standard Moxa warranty (typically 3 years) covering defects in materials and workmanship.
Technical Support:
- Comprehensive documentation, pinout diagrams, and user manuals available at [www.moxa.com](https://www.moxa.com).
- Global technical support network for configuration, troubleshooting, and firmware updates.
Maintenance:
- No periodic maintenance required beyond ensuring clean connectors and stable power supply.
- Avoid exposure to excessive dust, moisture, or vibration.
Firmware & Updates:
- The A53 operates as a hardware-level converter with no firmware dependency; thus, no software updates are required.
Ordering Information:
- Model: A53-230 (without power supply)
- Optional Accessories:
- Power adapter (9 VDC, 1.5 A, UL/TUV certified)
- RJ45-to-DB9/DB25 adapter cables
- Mounting hardware (included)
Manufacturer Contact:
Moxa Technologies Co., Ltd.
Website: [www.moxa.com](https://www.moxa.com)
Part No.: 18020005210
Printed in Taiwan, 1st Edition, April 2000
### Summary
The Moxa Transio A53 is a robust, intelligent RS-232 to RS-422/485 converter engineered for industrial communication environments requiring electrical isolation and high reliability. Its automatic data direction control, 2 kV optical isolation, and comprehensive surge protection make it ideal for factory automation, building control, and remote data acquisition systems. With support for high-speed data rates, multi-drop networking, and simple configuration, the A53 provides a dependable and maintenance-free solution for extending serial communication networks across long distances and diverse industrial applications.
Key Advantages:
- Seamless RS-232 to RS-422/485 conversion
- Automatic half-duplex control (ADDC)
- 2 kV optical isolation for signal integrity
- Wide 9–30 VDC power input range
- Compact, mountable design with LED diagnostics
- CE certified for industrial use
The Transio A53 exemplifies Moxa’s commitment to reliable, intelligent serial communication solutions for modern industrial automation systems.
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