1. Product Overview
Product Name: RS-232 to RS-485 (Isolated) Converter
Model: EX9520R
Series: Autopro Industrial Communication Series
Article Number: EX9520R
Manufacturer: Autopro

The Autopro EX9520R is a robust, industrial-grade communication converter designed to bridge RS-232 and RS-485 interfaces. It provides reliable, isolated data conversion between serial communication standards, enabling seamless integration of legacy RS-232 devices into modern RS-485 networks. The EX9520R is engineered for demanding industrial environments, offering extended temperature operation, galvanic isolation, and flexible mounting options. It is part of Autopro’s professional line of serial communication converters, known for their durability, precision, and ease of deployment in automation, control, and monitoring systems.

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2. Key Features
- RS-232 to RS-485 Conversion: Enables direct communication between RS-232 devices (e.g., PCs, PLCs, controllers) and RS-485 networks.
- Isolated RS-422/RS-485 Interface: Provides electrical isolation between RS-232 and RS-485 sides, protecting connected equipment from ground loops, surges, and electrical noise.
- Automatic Baud Rate Detection: The converter automatically detects and adjusts to the baud rate of the connected RS-232 device, simplifying setup and ensuring compatibility with a wide range of communication speeds.
- Auto Flow Control: Supports automatic direction control for RS-485 data transmission, eliminating the need for manual RTS signal handling.
- Extended Communication Range: Supports RS-485 communication distances up to 1200 meters (approximately 4000 feet), allowing long-distance data transmission in industrial networks.
- High Device Capacity: Enables control and communication with up to 256 devices on a single RS-485 bus.
- Extended Temperature Range: Designed for operation in harsh environments, with a temperature range from -25°C to +75°C.
- Flexible Power Options: Standard EX9520R operates on 10–30 VDC; the EX9520R+ variant supports a wider input range of 9–48 VDC for enhanced flexibility.
- Mounting Flexibility: Includes both DIN rail (cap-rail) and wall-mounting options for easy installation in control cabinets or equipment enclosures.
- Network Expansion Capability: Can be used with RS-485 repeaters to extend network range or with a second converter to create an RS-232 bridge over RS-485.
- Industrial-Grade Reliability: Built for continuous operation in automation, process control, and data acquisition systems.

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3. Technical Specifications
- Model: EX9520R
- Interface Conversion: RS-232 to RS-485 (isolated)
- Supported Standards: RS-232, RS-422, RS-485
- Isolation: Galvanic isolation on RS-485 input/output
- Baud Rate: Automatic detection and adjustment (supports standard serial baud rates)
- Flow Control: Automatic direction control (no manual RTS/CTS required)
- Communication Distance: Up to 1200 meters (RS-485)
- Device Capacity: Up to 256 nodes on RS-485 network
- Operating Voltage: 10–30 VDC (EX9520R); 9–48 VDC (EX9520R+)
- Operating Temperature: -25°C to +75°C
- Mounting Options: DIN rail (cap-rail) and wall mount (included upon request)
- Material: Industrial-grade metal or reinforced ABS housing (typical for Autopro converters)
- Protection: Electrical isolation, surge protection, and noise immunity
- Dimensions: (Typical Autopro form factor; exact dimensions not specified, generally compact for panel integration)
- Weight: Lightweight, suitable for DIN rail installation (exact weight not specified)
- Indicators: Power and data transmission LEDs (typical feature for monitoring communication status)

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4. Functionality
The EX9520R functions as a transparent data bridge between RS-232 and RS-485 communication standards. It converts the single-ended RS-232 signals into differential RS-485 signals, allowing data to be transmitted over longer distances and to multiple devices.

How It Works:
- The RS-232 port connects to a host device such as a computer, PLC, or controller.
- The RS-485 port connects to a multi-drop network of RS-485 devices such as sensors, actuators, or other controllers.
- The converter automatically detects the baud rate of the RS-232 signal and configures itself accordingly.
- Auto flow control manages the direction of data transmission on the RS-485 bus, ensuring proper half-duplex communication without manual intervention.
- Electrical isolation between the RS-232 and RS-485 sides prevents ground potential differences and protects against electrical interference.

Use Cases and Applications:
- Industrial automation and process control systems
- Building management and HVAC control networks
- SCADA (Supervisory Control and Data Acquisition) systems
- Remote data acquisition and telemetry
- Factory equipment integration and machine-to-machine communication
- Long-distance serial communication links
- RS-232 device networking and legacy system integration

Compatibility:
- Compatible with standard RS-232 and RS-485 devices
- Works with PLCs, HMIs, industrial PCs, sensors, and controllers
- Can be used with Autopro RS-485 repeaters and other network expansion devices

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5. Components & Accessories
Included Items:
- EX9520R RS-232 to RS-485 converter unit
- DIN rail (cap-rail) mounting bracket
- Wall-mounting kit (available upon request or included when specified in order)
- User documentation or quick-start guide

Optional Add-ons:
- EX9520R+ model (for extended power input range 9–48 VDC)
- RS-485 repeaters for network extension
- Power supply units (10–30 VDC or 9–48 VDC depending on model)
- Communication cables and terminal adapters

Connectors:
- RS-232 interface: typically DB9 female or terminal block (depending on configuration)
- RS-485 interface: terminal block for differential pair (A/B lines)
- Power input: terminal block or barrel connector (depending on installation type)

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6. Installation & Setup
Requirements:
- DC power supply (10–30 VDC for EX9520R, 9–48 VDC for EX9520R+)
- RS-232 host device and RS-485 network wiring
- Proper grounding and shielding for industrial environments

Mounting Options:
- DIN Rail Mounting: The converter can be clipped onto a standard 35 mm DIN rail using the included cap-rail bracket, ideal for control cabinets.
- Wall Mounting: Optional wall-mount brackets allow installation on flat surfaces or panels.

Configuration:
- Plug-and-play operation with automatic baud rate and flow control detection.
- No manual configuration required for most applications.
- For advanced setups, users can specify mounting preferences (DIN rail or wall mount) when ordering.

Setup Steps:
1. Connect the RS-232 port to the host device.
2. Connect the RS-485 terminals to the network bus (A/B lines).
3. Apply DC power within the specified voltage range.
4. Verify communication using indicator LEDs (if available).
5. Begin data transmission—converter automatically manages baud rate and direction.

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7. Performance & Capabilities
- Speed: Supports standard RS-232 and RS-485 baud rates with automatic detection.
- Capacity: Up to 256 devices on a single RS-485 bus.
- Distance: Up to 1200 meters (4000 feet) communication range over twisted-pair cable.
- Efficiency: Automatic flow control ensures optimal data throughput without manual RTS/CTS handling.
- Reliability: Isolated design minimizes communication errors caused by electrical interference or ground loops.
- Scalability: Can be combined with RS-485 repeaters to extend network range or with another EX9520R to form an RS-232 bridge over RS-485.
- Limitations:
- RS-485 communication limited to 1200 m per segment (extendable with repeaters).
- Power supply must remain within specified voltage range for stable operation.
- Environmental conditions must remain within -25°C to +75°C for optimal performance.

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8. Standards & Compliance
- Communication Standards:
- RS-232 (EIA/TIA-232)
- RS-422 (EIA/TIA-422)
- RS-485 (EIA/TIA-485)

- Electrical Isolation:
- Provides galvanic isolation between RS-232 and RS-485 interfaces to meet industrial safety and reliability standards.

- Environmental Compliance:
- Designed for extended temperature operation (-25°C to +75°C).
- Suitable for industrial environments with electrical noise and vibration.

- Regulatory Compliance:
- Conforms to general industrial EMC and safety requirements (typical for Autopro industrial converters).
- RoHS-compliant materials and construction (lead-free, environmentally safe).

- Industry Standards:
- Compatible with Modbus RTU and other serial communication protocols over RS-485.
- Meets requirements for industrial automation and control equipment communication interfaces.

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9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1–2 years depending on region and distributor).
- Covers defects in materials and workmanship under normal operating conditions.

Support:
- Technical documentation and user manuals available from Autopro.
- Customer support for installation, troubleshooting, and configuration assistance.
- Firmware and compatibility updates provided as needed.

Maintenance:
- Minimal maintenance required due to solid-state design.
- Periodic inspection of wiring and connectors recommended for long-term reliability.
- Ensure proper ventilation and protection from excessive dust or moisture.

Updates and Variants:
- EX9520R+: Enhanced version supporting 9–48 VDC input range for broader power supply compatibility.
- Network Expansion: Compatible with Autopro RS-485 repeaters for extending communication range beyond 1200 m.
- Customization: Mounting options (DIN rail or wall mount) can be specified at order time.

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Summary
The Autopro EX9520R RS-232 to RS-485 (Isolated) Converter is a high-performance, industrial-grade communication interface designed to integrate RS-232 devices into RS-485 networks with maximum reliability and minimal configuration. Featuring automatic baud rate detection, auto flow control, and galvanic isolation, it ensures stable and interference-free data transmission across long distances—up to 1200 meters. Its extended temperature range (-25°C to +75°C) and flexible power input (10–30 VDC, or 9–48 VDC for the EX9520R+) make it suitable for a wide range of industrial and automation applications.

With support for up to 256 devices on a single RS-485 bus, the EX9520R is ideal for distributed control systems, SCADA networks, and remote monitoring installations. Its plug-and-play functionality, combined with robust construction and compliance with RS-232/RS-485 standards, makes it a dependable choice for engineers and system integrators seeking reliable serial communication solutions in demanding environments.