SUCHEN SIE DIE PASSENDE
INDUSTRIELLE LÖSUNG?
Entdecken Sie Embedded-, Kommunikations- und Automatisierungslösungen für Ihre Anwendung.
- Bidirectional Signal Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, supporting full-duplex (4-wire) and half-duplex (2-wire) communication modes.
- High Isolation Protection: Provides 2000 V isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops and voltage surges.
- Flexible Operation Modes: Selectable via internal switches for full/half-duplex operation and RTS-controlled transmission.
- High-Speed Data Transmission: Supports data rates up to 921.6 kbps over distances up to 500 ft (0.15 km), and up to 115.2 kbps over 4000 ft (1.2 km).
- LED Indicators: Front-panel LEDs display power, transmit (TxD), receive (RxD), and RTS signal status for easy diagnostics.
- Multiple Connectors: Equipped with both RJ-45 and terminal block connectors for RS-422/485 interfaces, and RJ-45 for RS-232.
- Wide Power Input Range: Operates from 9 to 30 VDC, consuming approximately 150 mA.
- Compact and Lightweight: Measures 90 × 60 × 21 mm and weighs approximately 80 g.
- Industrial Durability: Designed for industrial automation, process control, and remote device communication.
- Mounting Options: Includes plastic mounting plates and screws for wall or surface installation.
- High Isolation Protection: Provides 2000 V isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops and voltage surges.
- Flexible Operation Modes: Selectable via internal switches for full/half-duplex operation and RTS-controlled transmission.
- High-Speed Data Transmission: Supports data rates up to 921.6 kbps over distances up to 500 ft (0.15 km), and up to 115.2 kbps over 4000 ft (1.2 km).
- LED Indicators: Front-panel LEDs display power, transmit (TxD), receive (RxD), and RTS signal status for easy diagnostics.
- Multiple Connectors: Equipped with both RJ-45 and terminal block connectors for RS-422/485 interfaces, and RJ-45 for RS-232.
- Wide Power Input Range: Operates from 9 to 30 VDC, consuming approximately 150 mA.
- Compact and Lightweight: Measures 90 × 60 × 21 mm and weighs approximately 80 g.
- Industrial Durability: Designed for industrial automation, process control, and remote device communication.
- Mounting Options: Includes plastic mounting plates and screws for wall or surface installation.
1. Product Overview
Product Name: RS-232 to RS-422/RS-485 Isolated External Converter
Model: A51
Series: A50/A51/A60 Converter Series
Article Number: A51
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa A51 is a bidirectional, isolated RS-232 to RS-422/RS-485 converter designed for industrial and automation environments requiring reliable, long-distance serial communication. It converts unbalanced RS-232 signals into balanced RS-422 or RS-485 differential signals, enabling communication over extended distances and with multiple devices. The A51 is part of Moxa’s A50/A51/A60 converter family, with the A51 distinguished by its 2 kV isolation protection between the RS-232 and RS-422/485 interfaces.
2. Key Features
- Bidirectional Signal Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, supporting full-duplex (4-wire) and half-duplex (2-wire) communication modes.
- High Isolation Protection: Provides 2000 V isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops and voltage surges.
- Flexible Operation Modes: Selectable via internal switches for full/half-duplex operation and RTS-controlled transmission.
- High-Speed Data Transmission: Supports data rates up to 921.6 kbps over distances up to 500 ft (0.15 km), and up to 115.2 kbps over 4000 ft (1.2 km).
- LED Indicators: Front-panel LEDs display power, transmit (TxD), receive (RxD), and RTS signal status for easy diagnostics.
- Multiple Connectors: Equipped with both RJ-45 and terminal block connectors for RS-422/485 interfaces, and RJ-45 for RS-232.
- Wide Power Input Range: Operates from 9 to 30 VDC, consuming approximately 150 mA.
- Compact and Lightweight: Measures 90 × 60 × 21 mm and weighs approximately 80 g.
- Industrial Durability: Designed for industrial automation, process control, and remote device communication.
- Mounting Options: Includes plastic mounting plates and screws for wall or surface installation.
3. Technical Specifications
- Power Supply: 9–30 VDC, 150 mA
- Isolation Voltage: 2000 V (A51 only)
- Data Rate: Up to 921,600 bps (under 500 ft), up to 115,200 bps (under 4000 ft)
- Communication Distance:
- 500 ft (0.15 km) at 921.6 kbps
- 4000 ft (1.2 km) at 115.2 kbps
- Connectors:
- RS-232: RJ-45 (supports TxD, RxD, DTR, DSR, RTS, CTS, DCD, GND)
- RS-422/RS-485: RJ-45 and 6-pin terminal block (TxDA, TxDB, RxDA, RxDB, GND, Power, Power GND)
- Switches:
- SW1: Full-duplex (Off) / Half-duplex (On)
- SW2: TxD and RxD enable/disable control (RTS selectable)
- LED Indicators: Power (PWR), Transmit (TxD), Receive (RxD), RTS
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: 80 g
- Material: Rugged plastic enclosure with internal shielding and mounting provisions
- Operating Modes: Point-to-point, multidrop, simplex, self-test
- Mounting: Wall or surface mount via included kit
4. Functionality
The A51 functions as a transparent, bidirectional converter between RS-232 and RS-422/RS-485 interfaces. It enables communication between a host computer (DTE) and remote devices (DCE) over long distances or in electrically noisy environments.
Operation Modes:
- Point-to-Point: Direct connection between two devices using either 4-wire full-duplex or 2-wire half-duplex configuration.
- Multidrop: Supports up to 10 nodes for RS-422 and up to 32 nodes for RS-485 networks, allowing one master and multiple slaves.
- Simplex: One-way communication from a master to multiple slaves (transmit-only or receive-only).
- Self-Test: Internal loopback configuration for verifying converter operation.
Compatibility:
- Compatible with standard RS-232, RS-422, and RS-485 devices, including PLCs, industrial controllers, sensors, and serial communication modules.
- Supports both DTE and DCE configurations via RJ-45 to DB-9/DB-25 adapters.
Applications:
- Industrial automation systems
- Building management systems
- SCADA and telemetry networks
- Remote data acquisition
- Serial device networking over long distances
5. Components & Accessories
Included Items:
- A51 RS-232 to RS-422/RS-485 isolated converter
- Power adapter (9–30 VDC)
- Mounting kit (plastic plates and screws)
- A50/A51/A60 User’s Manual
Connectors:
- RS-232 RJ-45 Pinout:
1 – DCD, 2 – DSR, 3 – RTS, 4 – GND, 5 – TxD, 6 – RxD, 7 – GND, 8 – CTS, 9 – DTR
(RTS–CTS and DTR–DSR internally shorted for simplified wiring)
- RS-422/RS-485 RJ-45 Pinout:
1 – nc, 2 – nc, 3 – GND, 4 – TxD B, 5 – TxD A, 6 – RxD A, 7 – RxD B, 8 – GND
- RS-422/RS-485 Terminal Block Pinout:
1 – TxD B, 2 – TxD A, 3 – RxD B, 4 – RxD A, 5 – GND, 6 – Power GND, 7 – Power Input
Optional Accessories:
- Additional power adapters
- Custom RS-232/RS-485 cables
- Termination resistors (RT1 slot provided internally for impedance matching)
6. Installation & Setup
Requirements:
- DC power source (9–30 VDC, 150 mA)
- Proper RS-232 and RS-422/485 cables
- Screwdriver for opening the enclosure to access internal switches
Installation Steps:
1. Identify RS-232 and RS-422/485 ports on the converter.
2. Prepare appropriate cables according to pinout diagrams.
3. If necessary, open the converter by removing two screws to access SW1 and SW2.
4. Set SW1 for full- or half-duplex operation.
5. Configure SW2 for TxD/RxD enable modes (always enabled or RTS-controlled).
6. Connect power via the DC jack or terminal block pins 6 (Power GND) and 7 (Power Input).
7. Observe LED indicators to verify power and signal activity.
Mounting Options:
- Wall or panel mounting using included plastic plates and screws.
- Ensure adequate ventilation and grounding, especially for isolated operation.
Configuration Notes:
- In half-duplex mode, TxD and RxD pairs are internally shorted for convenience.
- For A51, connect terminal block GND to earth ground to enhance isolation and lightning protection.
7. Performance & Capabilities
- Speed: Up to 921.6 kbps (short distance), 115.2 kbps (long distance)
- Capacity: Supports up to 10 RS-422 or 32 RS-485 nodes in multidrop mode
- Efficiency: Low power consumption (150 mA typical)
- Signal Integrity: Differential signaling minimizes noise and crosstalk
- Isolation: 2 kV galvanic isolation prevents ground loops and surge damage
- Termination: Internal RT1 slot for impedance matching (100 Ω for AWG #26 cable, 600 Ω for phone cable)
- Limitations:
- Isolation available only on A51 model (not on A50)
- Requires external power supply
- Internal switches must be manually set for mode changes
8. Standards & Compliance
- Electrical Standards:
- RS-232 (EIA/TIA-232)
- RS-422 (EIA/TIA-422)
- RS-485 (EIA/TIA-485)
- Isolation Rating: 2000 V (A51)
- Regulatory Compliance: Designed to meet industrial communication and safety standards applicable to serial data converters.
- Quality Assurance: Manufactured by Moxa Technologies under ISO-certified processes.
- Environmental Considerations: Suitable for industrial environments with electrical noise and potential surge exposure.
9. Additional Information
Warranty & Support:
Moxa provides standard warranty coverage for manufacturing defects and offers technical support through multiple channels:
- Email: support@moxa.com.tw
- FTP Site: ftp.moxa.com or ftp.moxa.com.tw (User ID: ftp, Password: your_email_address)
- Website: www.moxa.com or www.moxa.com.tw
Maintenance:
- Periodically inspect connectors and cables for wear or corrosion.
- Ensure grounding connections remain secure.
- Verify LED indicators during operation to confirm proper data flow.
- Replace power adapter if voltage output deviates from specifications.
Firmware & Updates:
Although the A51 is a hardware-based converter with no firmware, Moxa provides updated manuals and driver resources for related products via its FTP and web services.
Troubleshooting Summary:
- No Data Transmission: Check power supply, cable connections, and switch settings.
- Data Errors: Verify baud rate and data format consistency across devices.
- Self-Test Failure: Confirm loopback wiring and switch configuration per manual.
Service Life & Reliability:
The A51 is engineered for long-term industrial use, with robust isolation and surge protection ensuring stable operation in harsh environments.
Summary
The Moxa A51 RS-232 to RS-422/RS-485 Isolated Converter is a compact, high-performance interface device designed for industrial communication networks requiring reliable, long-distance serial data transmission. With 2 kV isolation, flexible configuration options, and support for both full- and half-duplex modes, it provides a robust solution for connecting legacy RS-232 equipment to modern RS-422/485 networks. Its LED diagnostics, wide power range, and durable construction make it ideal for automation, control, and monitoring applications where signal integrity and equipment protection are critical.
Product Name: RS-232 to RS-422/RS-485 Isolated External Converter
Model: A51
Series: A50/A51/A60 Converter Series
Article Number: A51
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa A51 is a bidirectional, isolated RS-232 to RS-422/RS-485 converter designed for industrial and automation environments requiring reliable, long-distance serial communication. It converts unbalanced RS-232 signals into balanced RS-422 or RS-485 differential signals, enabling communication over extended distances and with multiple devices. The A51 is part of Moxa’s A50/A51/A60 converter family, with the A51 distinguished by its 2 kV isolation protection between the RS-232 and RS-422/485 interfaces.
2. Key Features
- Bidirectional Signal Conversion: Converts RS-232 signals to RS-422 or RS-485 and vice versa, supporting full-duplex (4-wire) and half-duplex (2-wire) communication modes.
- High Isolation Protection: Provides 2000 V isolation between RS-232 and RS-422/485 interfaces, protecting connected equipment from ground loops and voltage surges.
- Flexible Operation Modes: Selectable via internal switches for full/half-duplex operation and RTS-controlled transmission.
- High-Speed Data Transmission: Supports data rates up to 921.6 kbps over distances up to 500 ft (0.15 km), and up to 115.2 kbps over 4000 ft (1.2 km).
- LED Indicators: Front-panel LEDs display power, transmit (TxD), receive (RxD), and RTS signal status for easy diagnostics.
- Multiple Connectors: Equipped with both RJ-45 and terminal block connectors for RS-422/485 interfaces, and RJ-45 for RS-232.
- Wide Power Input Range: Operates from 9 to 30 VDC, consuming approximately 150 mA.
- Compact and Lightweight: Measures 90 × 60 × 21 mm and weighs approximately 80 g.
- Industrial Durability: Designed for industrial automation, process control, and remote device communication.
- Mounting Options: Includes plastic mounting plates and screws for wall or surface installation.
3. Technical Specifications
- Power Supply: 9–30 VDC, 150 mA
- Isolation Voltage: 2000 V (A51 only)
- Data Rate: Up to 921,600 bps (under 500 ft), up to 115,200 bps (under 4000 ft)
- Communication Distance:
- 500 ft (0.15 km) at 921.6 kbps
- 4000 ft (1.2 km) at 115.2 kbps
- Connectors:
- RS-232: RJ-45 (supports TxD, RxD, DTR, DSR, RTS, CTS, DCD, GND)
- RS-422/RS-485: RJ-45 and 6-pin terminal block (TxDA, TxDB, RxDA, RxDB, GND, Power, Power GND)
- Switches:
- SW1: Full-duplex (Off) / Half-duplex (On)
- SW2: TxD and RxD enable/disable control (RTS selectable)
- LED Indicators: Power (PWR), Transmit (TxD), Receive (RxD), RTS
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: 80 g
- Material: Rugged plastic enclosure with internal shielding and mounting provisions
- Operating Modes: Point-to-point, multidrop, simplex, self-test
- Mounting: Wall or surface mount via included kit
4. Functionality
The A51 functions as a transparent, bidirectional converter between RS-232 and RS-422/RS-485 interfaces. It enables communication between a host computer (DTE) and remote devices (DCE) over long distances or in electrically noisy environments.
Operation Modes:
- Point-to-Point: Direct connection between two devices using either 4-wire full-duplex or 2-wire half-duplex configuration.
- Multidrop: Supports up to 10 nodes for RS-422 and up to 32 nodes for RS-485 networks, allowing one master and multiple slaves.
- Simplex: One-way communication from a master to multiple slaves (transmit-only or receive-only).
- Self-Test: Internal loopback configuration for verifying converter operation.
Compatibility:
- Compatible with standard RS-232, RS-422, and RS-485 devices, including PLCs, industrial controllers, sensors, and serial communication modules.
- Supports both DTE and DCE configurations via RJ-45 to DB-9/DB-25 adapters.
Applications:
- Industrial automation systems
- Building management systems
- SCADA and telemetry networks
- Remote data acquisition
- Serial device networking over long distances
5. Components & Accessories
Included Items:
- A51 RS-232 to RS-422/RS-485 isolated converter
- Power adapter (9–30 VDC)
- Mounting kit (plastic plates and screws)
- A50/A51/A60 User’s Manual
Connectors:
- RS-232 RJ-45 Pinout:
1 – DCD, 2 – DSR, 3 – RTS, 4 – GND, 5 – TxD, 6 – RxD, 7 – GND, 8 – CTS, 9 – DTR
(RTS–CTS and DTR–DSR internally shorted for simplified wiring)
- RS-422/RS-485 RJ-45 Pinout:
1 – nc, 2 – nc, 3 – GND, 4 – TxD B, 5 – TxD A, 6 – RxD A, 7 – RxD B, 8 – GND
- RS-422/RS-485 Terminal Block Pinout:
1 – TxD B, 2 – TxD A, 3 – RxD B, 4 – RxD A, 5 – GND, 6 – Power GND, 7 – Power Input
Optional Accessories:
- Additional power adapters
- Custom RS-232/RS-485 cables
- Termination resistors (RT1 slot provided internally for impedance matching)
6. Installation & Setup
Requirements:
- DC power source (9–30 VDC, 150 mA)
- Proper RS-232 and RS-422/485 cables
- Screwdriver for opening the enclosure to access internal switches
Installation Steps:
1. Identify RS-232 and RS-422/485 ports on the converter.
2. Prepare appropriate cables according to pinout diagrams.
3. If necessary, open the converter by removing two screws to access SW1 and SW2.
4. Set SW1 for full- or half-duplex operation.
5. Configure SW2 for TxD/RxD enable modes (always enabled or RTS-controlled).
6. Connect power via the DC jack or terminal block pins 6 (Power GND) and 7 (Power Input).
7. Observe LED indicators to verify power and signal activity.
Mounting Options:
- Wall or panel mounting using included plastic plates and screws.
- Ensure adequate ventilation and grounding, especially for isolated operation.
Configuration Notes:
- In half-duplex mode, TxD and RxD pairs are internally shorted for convenience.
- For A51, connect terminal block GND to earth ground to enhance isolation and lightning protection.
7. Performance & Capabilities
- Speed: Up to 921.6 kbps (short distance), 115.2 kbps (long distance)
- Capacity: Supports up to 10 RS-422 or 32 RS-485 nodes in multidrop mode
- Efficiency: Low power consumption (150 mA typical)
- Signal Integrity: Differential signaling minimizes noise and crosstalk
- Isolation: 2 kV galvanic isolation prevents ground loops and surge damage
- Termination: Internal RT1 slot for impedance matching (100 Ω for AWG #26 cable, 600 Ω for phone cable)
- Limitations:
- Isolation available only on A51 model (not on A50)
- Requires external power supply
- Internal switches must be manually set for mode changes
8. Standards & Compliance
- Electrical Standards:
- RS-232 (EIA/TIA-232)
- RS-422 (EIA/TIA-422)
- RS-485 (EIA/TIA-485)
- Isolation Rating: 2000 V (A51)
- Regulatory Compliance: Designed to meet industrial communication and safety standards applicable to serial data converters.
- Quality Assurance: Manufactured by Moxa Technologies under ISO-certified processes.
- Environmental Considerations: Suitable for industrial environments with electrical noise and potential surge exposure.
9. Additional Information
Warranty & Support:
Moxa provides standard warranty coverage for manufacturing defects and offers technical support through multiple channels:
- Email: support@moxa.com.tw
- FTP Site: ftp.moxa.com or ftp.moxa.com.tw (User ID: ftp, Password: your_email_address)
- Website: www.moxa.com or www.moxa.com.tw
Maintenance:
- Periodically inspect connectors and cables for wear or corrosion.
- Ensure grounding connections remain secure.
- Verify LED indicators during operation to confirm proper data flow.
- Replace power adapter if voltage output deviates from specifications.
Firmware & Updates:
Although the A51 is a hardware-based converter with no firmware, Moxa provides updated manuals and driver resources for related products via its FTP and web services.
Troubleshooting Summary:
- No Data Transmission: Check power supply, cable connections, and switch settings.
- Data Errors: Verify baud rate and data format consistency across devices.
- Self-Test Failure: Confirm loopback wiring and switch configuration per manual.
Service Life & Reliability:
The A51 is engineered for long-term industrial use, with robust isolation and surge protection ensuring stable operation in harsh environments.
Summary
The Moxa A51 RS-232 to RS-422/RS-485 Isolated Converter is a compact, high-performance interface device designed for industrial communication networks requiring reliable, long-distance serial data transmission. With 2 kV isolation, flexible configuration options, and support for both full- and half-duplex modes, it provides a robust solution for connecting legacy RS-232 equipment to modern RS-422/485 networks. Its LED diagnostics, wide power range, and durable construction make it ideal for automation, control, and monitoring applications where signal integrity and equipment protection are critical.
-
A50_51_60.pdf
Manual
Kein Zubehör vorhanden.
