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- High Surge Protection: Provides up to 2000V transient voltage suppression on RS-232 lines, protecting connected devices from lightning-induced surges and industrial electrical noise.
- Non-Powered Operation: The A60 requires no external power supply, simplifying installation and ensuring reliability in environments where power availability is limited.
- Comprehensive Signal Support: Supports all standard RS-232 signals including TxD, RxD, DTR, DSR, RTS, CTS, DCD, and GND.
- LED Status Indicators: Equipped with seven LED indicators (TxD, RxD, DTR, DSR, RTS, CTS, DCD) to display signal activity and line status for both local and remote ports.
- Compact and Lightweight Design: Measures 90 × 60 × 21 mm and weighs only 68 g, allowing easy integration into existing setups or control panels.
- Dual Interface Options: Offers both RJ-45 and terminal block connectors for flexible wiring and compatibility with various RS-232 devices.
- Industrial-Grade Construction: Designed for harsh industrial environments, particularly factory automation systems where inductive loads and electrical noise are common.
- Mounting Flexibility: Includes a plastic mounting kit with screws for wall or surface installation.
- Self-Test Capability: Built-in loopback configuration allows users to verify device operation and cable integrity.
- Maintenance-Free Design: Solid-state transient voltage suppressors ensure long-term reliability without periodic maintenance.
- Non-Powered Operation: The A60 requires no external power supply, simplifying installation and ensuring reliability in environments where power availability is limited.
- Comprehensive Signal Support: Supports all standard RS-232 signals including TxD, RxD, DTR, DSR, RTS, CTS, DCD, and GND.
- LED Status Indicators: Equipped with seven LED indicators (TxD, RxD, DTR, DSR, RTS, CTS, DCD) to display signal activity and line status for both local and remote ports.
- Compact and Lightweight Design: Measures 90 × 60 × 21 mm and weighs only 68 g, allowing easy integration into existing setups or control panels.
- Dual Interface Options: Offers both RJ-45 and terminal block connectors for flexible wiring and compatibility with various RS-232 devices.
- Industrial-Grade Construction: Designed for harsh industrial environments, particularly factory automation systems where inductive loads and electrical noise are common.
- Mounting Flexibility: Includes a plastic mounting kit with screws for wall or surface installation.
- Self-Test Capability: Built-in loopback configuration allows users to verify device operation and cable integrity.
- Maintenance-Free Design: Solid-state transient voltage suppressors ensure long-term reliability without periodic maintenance.
1. Product Overview
Product Name: RS-232 Surge Protection Converter
Model: A60
Series: A50/A51/A60 Industrial Communication Accessories
Article Number: A60
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa A60 is a compact, non-powered RS-232 surge protection converter designed to safeguard serial communication lines from transient overvoltages (TOV) caused by lightning strikes, electrostatic discharge (ESD), and inductive load switching. It is part of Moxa’s A50/A51/A60 series of serial communication accessories, which include converters and protection devices for industrial automation and data communication systems. The A60 provides up to 2000V surge protection and features LED indicators for monitoring signal activity and line status.
2. Key Features
- High Surge Protection: Provides up to 2000V transient voltage suppression on RS-232 lines, protecting connected devices from lightning-induced surges and industrial electrical noise.
- Non-Powered Operation: The A60 requires no external power supply, simplifying installation and ensuring reliability in environments where power availability is limited.
- Comprehensive Signal Support: Supports all standard RS-232 signals including TxD, RxD, DTR, DSR, RTS, CTS, DCD, and GND.
- LED Status Indicators: Equipped with seven LED indicators (TxD, RxD, DTR, DSR, RTS, CTS, DCD) to display signal activity and line status for both local and remote ports.
- Compact and Lightweight Design: Measures 90 × 60 × 21 mm and weighs only 68 g, allowing easy integration into existing setups or control panels.
- Dual Interface Options: Offers both RJ-45 and terminal block connectors for flexible wiring and compatibility with various RS-232 devices.
- Industrial-Grade Construction: Designed for harsh industrial environments, particularly factory automation systems where inductive loads and electrical noise are common.
- Mounting Flexibility: Includes a plastic mounting kit with screws for wall or surface installation.
- Self-Test Capability: Built-in loopback configuration allows users to verify device operation and cable integrity.
- Maintenance-Free Design: Solid-state transient voltage suppressors ensure long-term reliability without periodic maintenance.
3. Technical Specifications
- Interface Type: RS-232
- Connectors:
- RJ-45 connector supporting TxD, RxD, DTR, DSR, RTS, CTS, DCD, GND
- Terminal block connector supporting TxD, RxD, DTR, DSR, RTS, CTS, GND (no DCD signal)
- Surge Protection: Up to 2000V transient voltage suppression
- LED Indicators:
- TxD (Transmit Data)
- RxD (Receive Data)
- DTR (Data Terminal Ready)
- DSR (Data Set Ready)
- RTS (Request to Send)
- CTS (Clear to Send)
- DCD (Data Carrier Detect)
- Power Requirement: None (non-powered device)
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: 68 g
- Material: Industrial-grade plastic housing with mounting plates
- Mounting Options: Wall or surface mount using included kit
- Operating Environment: Suitable for industrial and automation environments with high electrical noise or surge risk
4. Functionality
The Moxa A60 functions as a passive surge protection device for RS-232 communication lines. It is installed in-line between a local host (e.g., PC, PLC, or controller) and a remote RS-232 device (e.g., modem, sensor, or terminal). The A60’s internal transient voltage suppressors (TVS diodes) clamp high-voltage surges to safe levels, preventing damage to sensitive communication ports.
Operation Principle:
When a transient overvoltage occurs on the RS-232 line—such as from lightning or inductive switching—the A60’s TVS components absorb and dissipate the excess energy, limiting the voltage seen by the connected equipment. This ensures continuous, reliable data transmission even in electrically noisy environments.
Use Cases and Applications:
- Factory automation systems with inductive loads (motors, relays, solenoids)
- Industrial control networks using RS-232 communication
- Remote data acquisition systems exposed to lightning or ESD
- Serial communication between PLCs, HMIs, and sensors
- Telecommunications and instrumentation systems requiring surge isolation
Compatibility:
The A60 is compatible with any standard RS-232 interface, including DTE (Data Terminal Equipment) such as PCs and terminals, and DCE (Data Communication Equipment) such as modems and serial converters. It supports both DB-9 and DB-25 connections through appropriate RJ-45 or terminal block wiring.
5. Components & Accessories
Included Items:
- A60 RS-232 Surge Protection Converter
- Mounting kit (plastic plates and screws)
- A50/A51/A60 User’s Manual
Optional Accessories:
- RS-232 cables (RJ-45 to DB-9 or DB-25)
- Terminal block connectors for custom wiring
- Additional A60 units for dual-end protection
Connectors and Pinouts:
- RJ-45 Connector Pinout:
1. DCD
2. DSR
3. RTS
4. GND
5. TxD
6. RxD
7. GND
8. CTS
9. DTR
10. (Not connected)
- Terminal Block Pinout:
1. TxD
2. RxD
3. DTR
4. DSR
5. RTS
6. CTS
7. GND
Cable Wiring Options:
- Type 1: Full RS-232 wiring for DTE/DCE connections (supports hardware flow control).
- Type 2: Simplified 3-wire connection (TxD, RxD, GND) for applications not requiring flow control.
6. Installation & Setup
Installation Procedure:
1. Identify the local and remote ports on the A60 (clearly labeled on the housing).
2. Connect the RS-232 cable from the local host to the A60’s local port.
3. Connect the remote device to the A60’s remote port.
4. For maximum protection, install the A60 as close as possible to the local host.
5. If both ends of the communication line require protection, install an A60 unit at each end.
6. Connect the terminal block’s ground (GND) to earth ground to provide a discharge path for surge energy.
7. Verify LED indicators for proper signal activity.
Mounting Options:
- Wall or panel mounting using the included plastic plates and screws.
- Compact form factor allows installation inside control cabinets or junction boxes.
Configuration:
The A60 requires no configuration or power supply. Once connected, it automatically provides surge protection and signal pass-through.
7. Performance & Capabilities
Surge Protection Performance:
- Rated for up to 2000V transient voltage suppression.
- Protects against lightning-induced surges, ESD, and inductive switching transients.
- Bidirectional protection for both transmit and receive lines.
Signal Integrity:
- Transparent to RS-232 communication; introduces negligible signal delay or distortion.
- Maintains full compliance with RS-232 voltage levels and timing.
LED Indicator Behavior:
- TxD (Local Port):
- Green: Connected, idle
- Orange: Data transmitting
- RxD (Remote Port):
- Green: Connected, idle
- Orange: Data receiving
- DTR/RTS (Local Port):
- Red: Signal ON
- Green: Signal OFF
- DSR/CTS/DCD (Remote Port):
- Red: Signal ON
- Green: Signal OFF
Limitations:
- Provides surge protection only for RS-232 lines; not suitable for RS-422/RS-485 or other differential interfaces.
- The A60 itself may be damaged if a surge occurs between the local port and host (hence the recommendation to install it close to the host).
- Terminal block interface does not support DCD signal.
8. Standards & Compliance
- Interface Standard: EIA/TIA RS-232
- Surge Protection Standard: 2000V transient voltage suppression (TVS diode-based)
- Safety and Grounding: Recommended earth grounding for terminal block GND
- Environmental Compliance: Designed for industrial environments with high EMI/RFI exposure
- Manufacturer Quality Assurance: Produced under Moxa’s ISO-certified manufacturing processes
- Regulatory Compliance: Conforms to general industrial electronic equipment standards applicable at the time of manufacture (1999 edition)
9. Additional Information
Warranty:
Moxa provides standard warranty coverage for manufacturing defects. The product is designed for long-term operation without maintenance due to its solid-state protection components.
Technical Support:
Moxa offers comprehensive 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:
The A60 requires no periodic maintenance. Users should periodically inspect cable connections and grounding integrity, especially in high-surge environments.
Firmware/Software Updates:
Not applicable; the A60 is a hardware-only passive device with no firmware.
Documentation and Resources:
- A50/A51/A60 User’s Manual (2nd Edition, December 1999)
- RS-232 Pinout and Cable Wiring Appendix
- Troubleshooting Guide
Troubleshooting Summary:
- No Data Transmission: Check RS-232 cable connections and verify correct pinouts.
- Data Errors: Ensure matching baud rate and data format between devices; verify surge grounding.
- Self-Test: Use loopback configuration to confirm proper operation (connect TxD to RxD, DTR to DSR, RTS to CTS).
Service Life and Reliability:
The A60’s solid-state surge suppression components provide long operational life under normal conditions. Proper grounding and installation near the host device maximize protection efficiency and longevity.
Summary
The Moxa A60 RS-232 Surge Protection Converter is a robust, maintenance-free solution for safeguarding serial communication lines in industrial and automation environments. With its 2000V surge protection capability, LED signal indicators, and non-powered design, it ensures reliable data transmission and equipment safety against transient overvoltages. Its dual interface options (RJ-45 and terminal block) and compact form factor make it versatile for integration into existing RS-232 systems. Designed for ease of installation and long-term reliability, the A60 is an essential component for protecting mission-critical serial communication infrastructure.
Product Name: RS-232 Surge Protection Converter
Model: A60
Series: A50/A51/A60 Industrial Communication Accessories
Article Number: A60
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa A60 is a compact, non-powered RS-232 surge protection converter designed to safeguard serial communication lines from transient overvoltages (TOV) caused by lightning strikes, electrostatic discharge (ESD), and inductive load switching. It is part of Moxa’s A50/A51/A60 series of serial communication accessories, which include converters and protection devices for industrial automation and data communication systems. The A60 provides up to 2000V surge protection and features LED indicators for monitoring signal activity and line status.
2. Key Features
- High Surge Protection: Provides up to 2000V transient voltage suppression on RS-232 lines, protecting connected devices from lightning-induced surges and industrial electrical noise.
- Non-Powered Operation: The A60 requires no external power supply, simplifying installation and ensuring reliability in environments where power availability is limited.
- Comprehensive Signal Support: Supports all standard RS-232 signals including TxD, RxD, DTR, DSR, RTS, CTS, DCD, and GND.
- LED Status Indicators: Equipped with seven LED indicators (TxD, RxD, DTR, DSR, RTS, CTS, DCD) to display signal activity and line status for both local and remote ports.
- Compact and Lightweight Design: Measures 90 × 60 × 21 mm and weighs only 68 g, allowing easy integration into existing setups or control panels.
- Dual Interface Options: Offers both RJ-45 and terminal block connectors for flexible wiring and compatibility with various RS-232 devices.
- Industrial-Grade Construction: Designed for harsh industrial environments, particularly factory automation systems where inductive loads and electrical noise are common.
- Mounting Flexibility: Includes a plastic mounting kit with screws for wall or surface installation.
- Self-Test Capability: Built-in loopback configuration allows users to verify device operation and cable integrity.
- Maintenance-Free Design: Solid-state transient voltage suppressors ensure long-term reliability without periodic maintenance.
3. Technical Specifications
- Interface Type: RS-232
- Connectors:
- RJ-45 connector supporting TxD, RxD, DTR, DSR, RTS, CTS, DCD, GND
- Terminal block connector supporting TxD, RxD, DTR, DSR, RTS, CTS, GND (no DCD signal)
- Surge Protection: Up to 2000V transient voltage suppression
- LED Indicators:
- TxD (Transmit Data)
- RxD (Receive Data)
- DTR (Data Terminal Ready)
- DSR (Data Set Ready)
- RTS (Request to Send)
- CTS (Clear to Send)
- DCD (Data Carrier Detect)
- Power Requirement: None (non-powered device)
- Dimensions: 90 mm (L) × 60 mm (W) × 21 mm (H)
- Weight: 68 g
- Material: Industrial-grade plastic housing with mounting plates
- Mounting Options: Wall or surface mount using included kit
- Operating Environment: Suitable for industrial and automation environments with high electrical noise or surge risk
4. Functionality
The Moxa A60 functions as a passive surge protection device for RS-232 communication lines. It is installed in-line between a local host (e.g., PC, PLC, or controller) and a remote RS-232 device (e.g., modem, sensor, or terminal). The A60’s internal transient voltage suppressors (TVS diodes) clamp high-voltage surges to safe levels, preventing damage to sensitive communication ports.
Operation Principle:
When a transient overvoltage occurs on the RS-232 line—such as from lightning or inductive switching—the A60’s TVS components absorb and dissipate the excess energy, limiting the voltage seen by the connected equipment. This ensures continuous, reliable data transmission even in electrically noisy environments.
Use Cases and Applications:
- Factory automation systems with inductive loads (motors, relays, solenoids)
- Industrial control networks using RS-232 communication
- Remote data acquisition systems exposed to lightning or ESD
- Serial communication between PLCs, HMIs, and sensors
- Telecommunications and instrumentation systems requiring surge isolation
Compatibility:
The A60 is compatible with any standard RS-232 interface, including DTE (Data Terminal Equipment) such as PCs and terminals, and DCE (Data Communication Equipment) such as modems and serial converters. It supports both DB-9 and DB-25 connections through appropriate RJ-45 or terminal block wiring.
5. Components & Accessories
Included Items:
- A60 RS-232 Surge Protection Converter
- Mounting kit (plastic plates and screws)
- A50/A51/A60 User’s Manual
Optional Accessories:
- RS-232 cables (RJ-45 to DB-9 or DB-25)
- Terminal block connectors for custom wiring
- Additional A60 units for dual-end protection
Connectors and Pinouts:
- RJ-45 Connector Pinout:
1. DCD
2. DSR
3. RTS
4. GND
5. TxD
6. RxD
7. GND
8. CTS
9. DTR
10. (Not connected)
- Terminal Block Pinout:
1. TxD
2. RxD
3. DTR
4. DSR
5. RTS
6. CTS
7. GND
Cable Wiring Options:
- Type 1: Full RS-232 wiring for DTE/DCE connections (supports hardware flow control).
- Type 2: Simplified 3-wire connection (TxD, RxD, GND) for applications not requiring flow control.
6. Installation & Setup
Installation Procedure:
1. Identify the local and remote ports on the A60 (clearly labeled on the housing).
2. Connect the RS-232 cable from the local host to the A60’s local port.
3. Connect the remote device to the A60’s remote port.
4. For maximum protection, install the A60 as close as possible to the local host.
5. If both ends of the communication line require protection, install an A60 unit at each end.
6. Connect the terminal block’s ground (GND) to earth ground to provide a discharge path for surge energy.
7. Verify LED indicators for proper signal activity.
Mounting Options:
- Wall or panel mounting using the included plastic plates and screws.
- Compact form factor allows installation inside control cabinets or junction boxes.
Configuration:
The A60 requires no configuration or power supply. Once connected, it automatically provides surge protection and signal pass-through.
7. Performance & Capabilities
Surge Protection Performance:
- Rated for up to 2000V transient voltage suppression.
- Protects against lightning-induced surges, ESD, and inductive switching transients.
- Bidirectional protection for both transmit and receive lines.
Signal Integrity:
- Transparent to RS-232 communication; introduces negligible signal delay or distortion.
- Maintains full compliance with RS-232 voltage levels and timing.
LED Indicator Behavior:
- TxD (Local Port):
- Green: Connected, idle
- Orange: Data transmitting
- RxD (Remote Port):
- Green: Connected, idle
- Orange: Data receiving
- DTR/RTS (Local Port):
- Red: Signal ON
- Green: Signal OFF
- DSR/CTS/DCD (Remote Port):
- Red: Signal ON
- Green: Signal OFF
Limitations:
- Provides surge protection only for RS-232 lines; not suitable for RS-422/RS-485 or other differential interfaces.
- The A60 itself may be damaged if a surge occurs between the local port and host (hence the recommendation to install it close to the host).
- Terminal block interface does not support DCD signal.
8. Standards & Compliance
- Interface Standard: EIA/TIA RS-232
- Surge Protection Standard: 2000V transient voltage suppression (TVS diode-based)
- Safety and Grounding: Recommended earth grounding for terminal block GND
- Environmental Compliance: Designed for industrial environments with high EMI/RFI exposure
- Manufacturer Quality Assurance: Produced under Moxa’s ISO-certified manufacturing processes
- Regulatory Compliance: Conforms to general industrial electronic equipment standards applicable at the time of manufacture (1999 edition)
9. Additional Information
Warranty:
Moxa provides standard warranty coverage for manufacturing defects. The product is designed for long-term operation without maintenance due to its solid-state protection components.
Technical Support:
Moxa offers comprehensive 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:
The A60 requires no periodic maintenance. Users should periodically inspect cable connections and grounding integrity, especially in high-surge environments.
Firmware/Software Updates:
Not applicable; the A60 is a hardware-only passive device with no firmware.
Documentation and Resources:
- A50/A51/A60 User’s Manual (2nd Edition, December 1999)
- RS-232 Pinout and Cable Wiring Appendix
- Troubleshooting Guide
Troubleshooting Summary:
- No Data Transmission: Check RS-232 cable connections and verify correct pinouts.
- Data Errors: Ensure matching baud rate and data format between devices; verify surge grounding.
- Self-Test: Use loopback configuration to confirm proper operation (connect TxD to RxD, DTR to DSR, RTS to CTS).
Service Life and Reliability:
The A60’s solid-state surge suppression components provide long operational life under normal conditions. Proper grounding and installation near the host device maximize protection efficiency and longevity.
Summary
The Moxa A60 RS-232 Surge Protection Converter is a robust, maintenance-free solution for safeguarding serial communication lines in industrial and automation environments. With its 2000V surge protection capability, LED signal indicators, and non-powered design, it ensures reliable data transmission and equipment safety against transient overvoltages. Its dual interface options (RJ-45 and terminal block) and compact form factor make it versatile for integration into existing RS-232 systems. Designed for ease of installation and long-term reliability, the A60 is an essential component for protecting mission-critical serial communication infrastructure.
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A50_51_60.pdf
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