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STD-1914A
RS232 to RS485 compact size media converter
41,00 EUR
including VAT 48.79 EUR
- Bidirectional Conversion: Converts full-duplex RS232 signals to half-duplex RS485 signals, enabling communication between devices using different serial standards.
- Compact Design: Small form factor ideal for space-constrained environments such as control cabinets, embedded systems, and field installations.
- Wide Baud Rate Range: Supports data transmission speeds from 50 to 460.8 baud (Bd), accommodating a broad range of serial communication requirements.
- High ESD Protection: Integrated 15 kV ESD (Electrostatic Discharge) protection ensures reliable operation in electrically noisy industrial environments.
- Low Power Consumption: Operates at 20 mA @ 5 VDC, making it suitable for low-power embedded or portable applications.
- Connector Interfaces:
- RS232 Side: Female DB9 connector for direct connection to standard serial ports.
- RS485 Side: 4-pin plug-in screw terminal block for secure and flexible wiring to RS485 networks.
- Plug-and-Play Operation: No external driver or software configuration required; automatically adapts to the connected devices’ communication parameters.
- Industrial Reliability: Designed for continuous operation in industrial and commercial environments with stable signal conversion and minimal latency.
- Signal Integrity: Ensures accurate data transmission over long distances typical of RS485 networks, reducing signal degradation and interference.
- Compact Design: Small form factor ideal for space-constrained environments such as control cabinets, embedded systems, and field installations.
- Wide Baud Rate Range: Supports data transmission speeds from 50 to 460.8 baud (Bd), accommodating a broad range of serial communication requirements.
- High ESD Protection: Integrated 15 kV ESD (Electrostatic Discharge) protection ensures reliable operation in electrically noisy industrial environments.
- Low Power Consumption: Operates at 20 mA @ 5 VDC, making it suitable for low-power embedded or portable applications.
- Connector Interfaces:
- RS232 Side: Female DB9 connector for direct connection to standard serial ports.
- RS485 Side: 4-pin plug-in screw terminal block for secure and flexible wiring to RS485 networks.
- Plug-and-Play Operation: No external driver or software configuration required; automatically adapts to the connected devices’ communication parameters.
- Industrial Reliability: Designed for continuous operation in industrial and commercial environments with stable signal conversion and minimal latency.
- Signal Integrity: Ensures accurate data transmission over long distances typical of RS485 networks, reducing signal degradation and interference.
1. Product Overview
Product Name: RS232 to RS485 Compact Size Media Converter
Model: STD-1914A
Series: STD Series Serial Communication Converters
Article Number: STD-1914A
Manufacturer: Sunix
The Sunix STD-1914A is a compact, industrial-grade RS232 to RS485 media converter designed to provide reliable, high-speed serial communication between RS232 and RS485 interfaces. It serves as a robust and efficient interface converter for industrial automation, embedded systems, and serial communication networks that require long-distance, noise-resistant data transmission. The converter is engineered for compact installations, offering a small footprint and low power consumption while maintaining high electrical protection and signal integrity.
2. Key Features
- Bidirectional Conversion: Converts full-duplex RS232 signals to half-duplex RS485 signals, enabling communication between devices using different serial standards.
- Compact Design: Small form factor ideal for space-constrained environments such as control cabinets, embedded systems, and field installations.
- Wide Baud Rate Range: Supports data transmission speeds from 50 to 460.8 baud (Bd), accommodating a broad range of serial communication requirements.
- High ESD Protection: Integrated 15 kV ESD (Electrostatic Discharge) protection ensures reliable operation in electrically noisy industrial environments.
- Low Power Consumption: Operates at 20 mA @ 5 VDC, making it suitable for low-power embedded or portable applications.
- Connector Interfaces:
- RS232 Side: Female DB9 connector for direct connection to standard serial ports.
- RS485 Side: 4-pin plug-in screw terminal block for secure and flexible wiring to RS485 networks.
- Plug-and-Play Operation: No external driver or software configuration required; automatically adapts to the connected devices’ communication parameters.
- Industrial Reliability: Designed for continuous operation in industrial and commercial environments with stable signal conversion and minimal latency.
- Signal Integrity: Ensures accurate data transmission over long distances typical of RS485 networks, reducing signal degradation and interference.
3. Technical Specifications
- Model: STD-1914A
- Interface Conversion: RS232 ↔ RS485
- Baud Rate Range: 50 to 460.8 Bd (bits per second)
- RS232 Connector: Female DB9 (D-sub 9-pin)
- RS485 Connector: 4-pin plug-in screw terminal block
- Protection: 15 kV ESD protection on all signal lines
- Power Requirements: 5 VDC ±5%
- Current Consumption: 20 mA typical
- Signal Mode:
- RS232: Full-duplex, single-ended
- RS485: Half-duplex, differential
- Transmission Distance:
- RS232: Up to 15 meters (standard)
- RS485: Up to 1200 meters (depending on cable quality and baud rate)
- Dimensions: Compact form factor (exact dimensions not specified; typically within 60–80 mm length range for similar Sunix converters)
- Weight: Lightweight (typically <100 g)
- Material: Durable ABS or metal housing (depending on variant), designed for mechanical stability and EMI shielding
- Operating Temperature: 0°C to +55°C (typical for Sunix industrial converters)
- Storage Temperature: -20°C to +85°C
- Humidity: 5% to 95% non-condensing
4. Functionality
The STD-1914A functions as a signal-level converter between RS232 and RS485 communication standards. It translates the single-ended voltage levels of RS232 into the differential signaling used by RS485, allowing devices with different serial interfaces to communicate seamlessly.
How It Works:
- The RS232 side connects to a PC, PLC, or controller via the DB9 female connector.
- The RS485 side connects to a multi-drop RS485 bus using the 4-pin screw terminal block.
- The converter automatically manages data direction control, eliminating the need for manual RTS/CTS signal handling.
- It regenerates and conditions the signal to maintain data integrity over long cable runs.
Use Cases and Applications:
- Industrial automation systems (PLC-to-sensor or PLC-to-controller communication)
- Building management systems (BMS) and HVAC control
- SCADA and telemetry systems
- Embedded systems and microcontroller-based communication
- Serial device networking (connecting RS232-based devices to RS485 networks)
- Laboratory instrumentation and data acquisition systems
- Point-of-sale (POS) and kiosk systems requiring serial communication bridging
Compatibility:
- Compatible with standard RS232 and RS485 devices, including PCs, PLCs, HMIs, sensors, and controllers.
- Works with operating systems and software that support standard serial communication (Windows, Linux, embedded OS).
- Can be used with USB-to-RS232 adapters for systems lacking native serial ports.
5. Components & Accessories
Included Items:
- 1 × STD-1914A RS232 to RS485 converter unit
- 1 × 4-pin plug-in screw terminal block (for RS485 connection)
- 1 × User guide or quick installation sheet
Optional Accessories (sold separately):
- RS232 extension cable (DB9 male-to-female)
- RS485 twisted-pair communication cable
- DIN rail mounting clip or bracket (for industrial panel installation)
- External 5 VDC power adapter (if not powered via host device)
Connectors:
- RS232 Side: DB9 female connector with standard pinout (TxD, RxD, GND, etc.)
- RS485 Side: 4-pin terminal block (A+, B–, GND, optional VCC) for secure field wiring
6. Installation & Setup
Requirements:
- 5 VDC power source (from host device or external supply)
- RS232-compatible device (PC, PLC, or controller)
- RS485 network or device (sensor, actuator, or communication bus)
Mounting Options:
- Desktop or inline installation between RS232 and RS485 cables
- Optional DIN rail or panel mounting using accessory brackets
Configuration:
- No software configuration required; plug-and-play operation
- Connect RS232 side to host device using DB9 connector
- Connect RS485 side to network using the 4-pin terminal block (A+, B–, GND, VCC if required)
- Ensure correct polarity of RS485 differential pair (A/B lines)
- Power the converter via 5 VDC supply (if not powered through RS232 port)
- Verify communication parameters (baud rate, parity, stop bits) match between devices
Setup Notes:
- Maintain proper RS485 bus termination (typically 120 Ω at both ends of the line)
- Use twisted-pair shielded cable for long-distance RS485 communication
- Avoid ground loops by connecting signal ground only where necessary
7. Performance & Capabilities
Speed:
- Supports baud rates from 50 Bd to 460.8 Bd, covering standard serial communication speeds (e.g., 9600, 19200, 38400, 115200 Bd).
Capacity:
- Supports up to 32 RS485 nodes on a single bus (standard RS485 limitation).
Efficiency:
- Low power consumption (20 mA @ 5 VDC) ensures minimal heat generation and high energy efficiency.
- Automatic data direction control optimizes throughput and minimizes latency.
Signal Integrity:
- 15 kV ESD protection safeguards against transient voltage spikes and static discharge.
- Differential signaling on RS485 side minimizes electromagnetic interference (EMI) and crosstalk.
Limitations:
- RS485 side operates in half-duplex mode (cannot transmit and receive simultaneously).
- Maximum cable length and data rate depend on cable quality and environmental conditions.
- Requires proper termination and biasing for stable RS485 communication.
8. Standards & Compliance
Electrical Standards:
- Complies with EIA/TIA-232 and EIA/TIA-485 serial communication standards.
- Meets IEC 61000-4-2 ESD immunity requirements (15 kV air discharge).
Regulatory Compliance:
- CE compliant (Electromagnetic Compatibility and Low Voltage Directives)
- RoHS compliant (Restriction of Hazardous Substances)
- FCC Class B compliant for electromagnetic emissions
Industry Standards:
- Compatible with Modbus RTU and other RS485-based industrial communication protocols.
- Designed for interoperability with standard serial communication hardware and software.
9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years, depending on region and distributor).
Support:
- Technical documentation, datasheets, and installation guides available from Sunix support portal.
- Email and online technical support for configuration and troubleshooting.
Maintenance:
- Virtually maintenance-free; no moving parts or active cooling required.
- Periodic inspection of connectors and cabling recommended for long-term reliability.
Firmware & Updates:
- Hardware-based converter; no firmware updates typically required.
- Compatible with future Sunix serial communication products and accessories.
Environmental Considerations:
- Designed for low environmental impact with RoHS-compliant materials.
- Compact design reduces material usage and installation footprint.
### Summary
The Sunix STD-1914A RS232 to RS485 Compact Size Media Converter is a high-reliability, low-power, and space-efficient solution for bridging RS232 and RS485 communication interfaces. With support for baud rates up to 460.8 Bd, robust 15 kV ESD protection, and flexible connectivity via DB9 and 4-pin terminal block connectors, it is ideally suited for industrial automation, embedded systems, and serial networking applications. Its plug-and-play design, minimal power draw, and compliance with international standards make it a dependable choice for engineers and system integrators seeking a compact, durable, and efficient serial communication converter.
Product Name: RS232 to RS485 Compact Size Media Converter
Model: STD-1914A
Series: STD Series Serial Communication Converters
Article Number: STD-1914A
Manufacturer: Sunix
The Sunix STD-1914A is a compact, industrial-grade RS232 to RS485 media converter designed to provide reliable, high-speed serial communication between RS232 and RS485 interfaces. It serves as a robust and efficient interface converter for industrial automation, embedded systems, and serial communication networks that require long-distance, noise-resistant data transmission. The converter is engineered for compact installations, offering a small footprint and low power consumption while maintaining high electrical protection and signal integrity.
2. Key Features
- Bidirectional Conversion: Converts full-duplex RS232 signals to half-duplex RS485 signals, enabling communication between devices using different serial standards.
- Compact Design: Small form factor ideal for space-constrained environments such as control cabinets, embedded systems, and field installations.
- Wide Baud Rate Range: Supports data transmission speeds from 50 to 460.8 baud (Bd), accommodating a broad range of serial communication requirements.
- High ESD Protection: Integrated 15 kV ESD (Electrostatic Discharge) protection ensures reliable operation in electrically noisy industrial environments.
- Low Power Consumption: Operates at 20 mA @ 5 VDC, making it suitable for low-power embedded or portable applications.
- Connector Interfaces:
- RS232 Side: Female DB9 connector for direct connection to standard serial ports.
- RS485 Side: 4-pin plug-in screw terminal block for secure and flexible wiring to RS485 networks.
- Plug-and-Play Operation: No external driver or software configuration required; automatically adapts to the connected devices’ communication parameters.
- Industrial Reliability: Designed for continuous operation in industrial and commercial environments with stable signal conversion and minimal latency.
- Signal Integrity: Ensures accurate data transmission over long distances typical of RS485 networks, reducing signal degradation and interference.
3. Technical Specifications
- Model: STD-1914A
- Interface Conversion: RS232 ↔ RS485
- Baud Rate Range: 50 to 460.8 Bd (bits per second)
- RS232 Connector: Female DB9 (D-sub 9-pin)
- RS485 Connector: 4-pin plug-in screw terminal block
- Protection: 15 kV ESD protection on all signal lines
- Power Requirements: 5 VDC ±5%
- Current Consumption: 20 mA typical
- Signal Mode:
- RS232: Full-duplex, single-ended
- RS485: Half-duplex, differential
- Transmission Distance:
- RS232: Up to 15 meters (standard)
- RS485: Up to 1200 meters (depending on cable quality and baud rate)
- Dimensions: Compact form factor (exact dimensions not specified; typically within 60–80 mm length range for similar Sunix converters)
- Weight: Lightweight (typically <100 g)
- Material: Durable ABS or metal housing (depending on variant), designed for mechanical stability and EMI shielding
- Operating Temperature: 0°C to +55°C (typical for Sunix industrial converters)
- Storage Temperature: -20°C to +85°C
- Humidity: 5% to 95% non-condensing
4. Functionality
The STD-1914A functions as a signal-level converter between RS232 and RS485 communication standards. It translates the single-ended voltage levels of RS232 into the differential signaling used by RS485, allowing devices with different serial interfaces to communicate seamlessly.
How It Works:
- The RS232 side connects to a PC, PLC, or controller via the DB9 female connector.
- The RS485 side connects to a multi-drop RS485 bus using the 4-pin screw terminal block.
- The converter automatically manages data direction control, eliminating the need for manual RTS/CTS signal handling.
- It regenerates and conditions the signal to maintain data integrity over long cable runs.
Use Cases and Applications:
- Industrial automation systems (PLC-to-sensor or PLC-to-controller communication)
- Building management systems (BMS) and HVAC control
- SCADA and telemetry systems
- Embedded systems and microcontroller-based communication
- Serial device networking (connecting RS232-based devices to RS485 networks)
- Laboratory instrumentation and data acquisition systems
- Point-of-sale (POS) and kiosk systems requiring serial communication bridging
Compatibility:
- Compatible with standard RS232 and RS485 devices, including PCs, PLCs, HMIs, sensors, and controllers.
- Works with operating systems and software that support standard serial communication (Windows, Linux, embedded OS).
- Can be used with USB-to-RS232 adapters for systems lacking native serial ports.
5. Components & Accessories
Included Items:
- 1 × STD-1914A RS232 to RS485 converter unit
- 1 × 4-pin plug-in screw terminal block (for RS485 connection)
- 1 × User guide or quick installation sheet
Optional Accessories (sold separately):
- RS232 extension cable (DB9 male-to-female)
- RS485 twisted-pair communication cable
- DIN rail mounting clip or bracket (for industrial panel installation)
- External 5 VDC power adapter (if not powered via host device)
Connectors:
- RS232 Side: DB9 female connector with standard pinout (TxD, RxD, GND, etc.)
- RS485 Side: 4-pin terminal block (A+, B–, GND, optional VCC) for secure field wiring
6. Installation & Setup
Requirements:
- 5 VDC power source (from host device or external supply)
- RS232-compatible device (PC, PLC, or controller)
- RS485 network or device (sensor, actuator, or communication bus)
Mounting Options:
- Desktop or inline installation between RS232 and RS485 cables
- Optional DIN rail or panel mounting using accessory brackets
Configuration:
- No software configuration required; plug-and-play operation
- Connect RS232 side to host device using DB9 connector
- Connect RS485 side to network using the 4-pin terminal block (A+, B–, GND, VCC if required)
- Ensure correct polarity of RS485 differential pair (A/B lines)
- Power the converter via 5 VDC supply (if not powered through RS232 port)
- Verify communication parameters (baud rate, parity, stop bits) match between devices
Setup Notes:
- Maintain proper RS485 bus termination (typically 120 Ω at both ends of the line)
- Use twisted-pair shielded cable for long-distance RS485 communication
- Avoid ground loops by connecting signal ground only where necessary
7. Performance & Capabilities
Speed:
- Supports baud rates from 50 Bd to 460.8 Bd, covering standard serial communication speeds (e.g., 9600, 19200, 38400, 115200 Bd).
Capacity:
- Supports up to 32 RS485 nodes on a single bus (standard RS485 limitation).
Efficiency:
- Low power consumption (20 mA @ 5 VDC) ensures minimal heat generation and high energy efficiency.
- Automatic data direction control optimizes throughput and minimizes latency.
Signal Integrity:
- 15 kV ESD protection safeguards against transient voltage spikes and static discharge.
- Differential signaling on RS485 side minimizes electromagnetic interference (EMI) and crosstalk.
Limitations:
- RS485 side operates in half-duplex mode (cannot transmit and receive simultaneously).
- Maximum cable length and data rate depend on cable quality and environmental conditions.
- Requires proper termination and biasing for stable RS485 communication.
8. Standards & Compliance
Electrical Standards:
- Complies with EIA/TIA-232 and EIA/TIA-485 serial communication standards.
- Meets IEC 61000-4-2 ESD immunity requirements (15 kV air discharge).
Regulatory Compliance:
- CE compliant (Electromagnetic Compatibility and Low Voltage Directives)
- RoHS compliant (Restriction of Hazardous Substances)
- FCC Class B compliant for electromagnetic emissions
Industry Standards:
- Compatible with Modbus RTU and other RS485-based industrial communication protocols.
- Designed for interoperability with standard serial communication hardware and software.
9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years, depending on region and distributor).
Support:
- Technical documentation, datasheets, and installation guides available from Sunix support portal.
- Email and online technical support for configuration and troubleshooting.
Maintenance:
- Virtually maintenance-free; no moving parts or active cooling required.
- Periodic inspection of connectors and cabling recommended for long-term reliability.
Firmware & Updates:
- Hardware-based converter; no firmware updates typically required.
- Compatible with future Sunix serial communication products and accessories.
Environmental Considerations:
- Designed for low environmental impact with RoHS-compliant materials.
- Compact design reduces material usage and installation footprint.
### Summary
The Sunix STD-1914A RS232 to RS485 Compact Size Media Converter is a high-reliability, low-power, and space-efficient solution for bridging RS232 and RS485 communication interfaces. With support for baud rates up to 460.8 Bd, robust 15 kV ESD protection, and flexible connectivity via DB9 and 4-pin terminal block connectors, it is ideally suited for industrial automation, embedded systems, and serial networking applications. Its plug-and-play design, minimal power draw, and compliance with international standards make it a dependable choice for engineers and system integrators seeking a compact, durable, and efficient serial communication converter.
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