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- One-to-Three Port Sharing:
Allows one master device (RS232 interface) to communicate with up to three slave devices (RS422/485 interfaces) simultaneously.
- Full Electrical Isolation:
Both the master and slave ports are galvanically isolated, providing ground isolation between external devices and the S234io unit. This prevents ground loops and electrical interference, ensuring stable and reliable data transmission.
- Dual Isolation Architecture:
Supports double ground isolation between any two external devices, enhancing protection against voltage surges and signal noise.
- Flexible Interface Configuration:
The master port (Port A) operates as an isolated RS232 interface, while the three slave ports (Ports B, C, D) can be configured as isolated RS422 or RS485 interfaces via DIP switch selection.
- Auto Data Direction Control (RS485 Mode):
In RS485 mode, the S234io automatically manages data direction control, eliminating the need for manual RTS signal handling. TX+ and RX+ lines are shorted as DATA+, and TX– and RX– lines are shorted as DATA–.
- Simultaneous Data Distribution:
Data received from the master port (A) is broadcast to all three slave ports (B, C, D) simultaneously. Conversely, data from any slave port is transmitted only to the master port, ensuring controlled communication flow.
- LED Status Indicators:
Four independent LED indicators display power and data activity for each port, simplifying diagnostics and monitoring.
- Compact and Durable Design:
The S234io features a compact metal enclosure measuring 90 mm (W) × 150 mm (L) × 27 mm (H), suitable for desktop or panel-mounted installations.
- Universal Power Compatibility:
Operates with a wide-range AC input (100–240 VAC) through the UP110/UP220 power adapter, providing a regulated 5 VDC output.
- Low Power Consumption:
Typical current draw is 400 mA at 5 VDC, making it energy-efficient for continuous operation.
- Industrial-Grade Environmental Tolerance:
Designed for operation in environments with temperatures from 0°C to 55°C and humidity levels up to 95% RH.
Allows one master device (RS232 interface) to communicate with up to three slave devices (RS422/485 interfaces) simultaneously.
- Full Electrical Isolation:
Both the master and slave ports are galvanically isolated, providing ground isolation between external devices and the S234io unit. This prevents ground loops and electrical interference, ensuring stable and reliable data transmission.
- Dual Isolation Architecture:
Supports double ground isolation between any two external devices, enhancing protection against voltage surges and signal noise.
- Flexible Interface Configuration:
The master port (Port A) operates as an isolated RS232 interface, while the three slave ports (Ports B, C, D) can be configured as isolated RS422 or RS485 interfaces via DIP switch selection.
- Auto Data Direction Control (RS485 Mode):
In RS485 mode, the S234io automatically manages data direction control, eliminating the need for manual RTS signal handling. TX+ and RX+ lines are shorted as DATA+, and TX– and RX– lines are shorted as DATA–.
- Simultaneous Data Distribution:
Data received from the master port (A) is broadcast to all three slave ports (B, C, D) simultaneously. Conversely, data from any slave port is transmitted only to the master port, ensuring controlled communication flow.
- LED Status Indicators:
Four independent LED indicators display power and data activity for each port, simplifying diagnostics and monitoring.
- Compact and Durable Design:
The S234io features a compact metal enclosure measuring 90 mm (W) × 150 mm (L) × 27 mm (H), suitable for desktop or panel-mounted installations.
- Universal Power Compatibility:
Operates with a wide-range AC input (100–240 VAC) through the UP110/UP220 power adapter, providing a regulated 5 VDC output.
- Low Power Consumption:
Typical current draw is 400 mA at 5 VDC, making it energy-efficient for continuous operation.
- Industrial-Grade Environmental Tolerance:
Designed for operation in environments with temperatures from 0°C to 55°C and humidity levels up to 95% RH.
Comprehensive Product Summary – Rayon Technology S234io Serial Port Sharer
### 1. Product Overview
Product Name: Serial Port Sharer
Model: S234io
Series: S400 Series
Article Number: S234io
Manufacturer: Rayon Technology Co., Ltd.
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact:
- Tel: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net
- Web: [www.rayontech.com](http://www.rayontech.com) / [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)
Product Description:
The Rayon S234io is a high-performance, isolated serial port sharing device designed to connect one RS232 master port to three isolated RS422/485 slave ports. It enables simultaneous data distribution from a single master to multiple slave devices while maintaining electrical isolation between all communication channels. The S234io belongs to Rayon’s S400 Series of serial communication interface converters and port sharers, engineered for industrial, laboratory, and automation environments requiring robust, noise-immune serial data communication.
### 2. Key Features
- One-to-Three Port Sharing:
Allows one master device (RS232 interface) to communicate with up to three slave devices (RS422/485 interfaces) simultaneously.
- Full Electrical Isolation:
Both the master and slave ports are galvanically isolated, providing ground isolation between external devices and the S234io unit. This prevents ground loops and electrical interference, ensuring stable and reliable data transmission.
- Dual Isolation Architecture:
Supports double ground isolation between any two external devices, enhancing protection against voltage surges and signal noise.
- Flexible Interface Configuration:
The master port (Port A) operates as an isolated RS232 interface, while the three slave ports (Ports B, C, D) can be configured as isolated RS422 or RS485 interfaces via DIP switch selection.
- Auto Data Direction Control (RS485 Mode):
In RS485 mode, the S234io automatically manages data direction control, eliminating the need for manual RTS signal handling. TX+ and RX+ lines are shorted as DATA+, and TX– and RX– lines are shorted as DATA–.
- Simultaneous Data Distribution:
Data received from the master port (A) is broadcast to all three slave ports (B, C, D) simultaneously. Conversely, data from any slave port is transmitted only to the master port, ensuring controlled communication flow.
- LED Status Indicators:
Four independent LED indicators display power and data activity for each port, simplifying diagnostics and monitoring.
- Compact and Durable Design:
The S234io features a compact metal enclosure measuring 90 mm (W) × 150 mm (L) × 27 mm (H), suitable for desktop or panel-mounted installations.
- Universal Power Compatibility:
Operates with a wide-range AC input (100–240 VAC) through the UP110/UP220 power adapter, providing a regulated 5 VDC output.
- Low Power Consumption:
Typical current draw is 400 mA at 5 VDC, making it energy-efficient for continuous operation.
- Industrial-Grade Environmental Tolerance:
Designed for operation in environments with temperatures from 0°C to 55°C and humidity levels up to 95% RH.
### 3. Technical Specifications
Electrical & Interface Specifications:
| Parameter | Specification |
|------------|----------------|
| Master Port Interface | Isolated RS232 |
| Slave Port Interfaces | Isolated RS422/485 (configurable via DIP switch) |
| Number of Ports | 4 total (1 master + 3 slave) |
| Connector Type | DB9 male connectors (Ports A, B, C, D) |
| Signal Pins per Port | TX+, TX–, RX+, RX–, Isolated GND |
| Auto Data Direction Control | Supported in RS485 mode |
| Isolation Type | Ground isolation between all ports and external devices |
| Power Input | 5 VDC, 1000 mA (via UP110/UP220 adapter) |
| Power Adapter Input Range | 100–240 VAC, 50/60 Hz |
| Current Consumption | 400 mA @ 5 VDC |
| LED Indicators | PWR, ATRX, BTRX, CTRX, DTRX |
| Dimensions | 90 mm (W) × 150 mm (L) × 27 mm (H) |
| Weight | Approx. 250–300 g (typical for S400 series units) |
| Material | Metal enclosure (Rayon standard industrial housing) |
Environmental Conditions:
| Parameter | Specification |
|------------|----------------|
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | 0°C to 65°C |
| Operating Humidity | 10% to 95% RH (non-condensing) |
| Storage Humidity | 5% to 95% RH (non-condensing) |
### 4. Functionality
Operational Concept:
The S234io functions as a serial communication hub that allows a single RS232 master device (such as a PC, PLC, or controller) to communicate with up to three RS422/485 slave devices (such as sensors, actuators, or other serial peripherals). The device replicates data from the master port to all slave ports simultaneously, ensuring synchronized communication across multiple endpoints.
Data Flow Behavior:
- Master to Slaves: Data transmitted from the master port (A) is broadcast to all three slave ports (B, C, D) concurrently.
- Slaves to Master: Data from any slave port is directed exclusively to the master port, preventing cross-communication between slave devices.
Isolation and Signal Integrity:
Each port is galvanically isolated, providing protection against ground potential differences and electrical noise. This isolation ensures reliable operation in electrically noisy industrial environments and prevents damage to connected equipment.
Interface Configuration:
The slave ports can be configured as RS422 or RS485 using onboard DIP switches. In RS485 mode, the Auto-Data-Direction-Control feature automatically manages transmit and receive line switching, simplifying integration with half-duplex RS485 networks.
Use Cases and Applications:
- Industrial automation systems requiring multi-drop serial communication.
- Data acquisition systems where one controller must communicate with multiple sensors or instruments.
- Laboratory and test setups for simultaneous data logging from multiple devices.
- Building management systems (BMS) and HVAC control networks.
- SCADA and PLC-based control systems.
- Serial device sharing in manufacturing or process control environments.
Compatibility:
The S234io is compatible with standard RS232, RS422, and RS485 communication protocols and can interface with a wide range of industrial controllers, computers, and serial devices. It supports both full-duplex (RS422) and half-duplex (RS485) communication modes.
### 5. Components & Accessories
Included Items:
- S234io Serial Port Sharer main unit.
- UP110 or UP220 power adapter (region-specific):
- Input: 100–240 VAC, 50/60 Hz.
- Output: 5 VDC, 1000 mA.
- User manual and configuration guide.
- Mounting hardware (optional, depending on package).
Connectors:
- Four DB9 male connectors (Ports A–D).
- Each connector provides five signal pins: TX+, TX–, RX+, RX–, and isolated ground.
Optional Accessories:
- RS232/RS485/RS422 communication cables.
- DIN rail or panel mounting brackets.
- Extended power supply cables.
- USB-to-RS232 adapters for PC integration.
### 6. Installation & Setup
Power Requirements:
- The S234io requires a regulated 5 VDC power supply, typically provided by the included UP110/UP220 adapter.
- Ensure the adapter is connected to a stable AC source (100–240 VAC).
Mounting Options:
- The compact 90 × 150 × 27 mm enclosure allows for desktop placement or panel mounting.
- Optional DIN rail brackets can be used for industrial cabinet installations.
Configuration:
- DIP Switch Settings:
Each slave port can be configured as RS422 or RS485 using onboard DIP switches.
- RS485 Mode Setup:
When configured for RS485, short TX+ to RX+ (DATA+) and TX– to RX– (DATA–) to enable Auto-Data-Direction-Control.
- Connection Guidelines:
- Connect the master device to Port A (RS232).
- Connect slave devices to Ports B, C, and D (RS422/485).
- Ensure proper wiring polarity and grounding for each interface type.
LED Indicators:
- PWR: Illuminates when DC power is applied.
- ATRX: Indicates transmit/receive activity on master port A.
- BTRX, CTRX, DTRX: Indicate data activity on slave ports B, C, and D respectively.
Startup Procedure:
1. Connect all serial cables to the appropriate ports.
2. Apply power using the supplied adapter.
3. Verify LED indicators for power and communication activity.
4. Configure DIP switches as required for RS422 or RS485 operation.
5. Begin communication from the master device.
### 7. Performance & Capabilities
Communication Performance:
- Supports standard RS232, RS422, and RS485 signaling levels.
- Capable of high-speed serial data transmission (typical up to 115.2 kbps or higher depending on cable length and environment).
- Maintains signal integrity across all isolated channels.
Data Distribution Efficiency:
- Real-time data replication from master to all slave ports ensures synchronized communication.
- Low latency and minimal propagation delay between ports.
Isolation Performance:
- Provides galvanic isolation between all ports, reducing the risk of ground loops and electrical interference.
- Double isolation between external devices enhances system reliability in complex installations.
Power Efficiency:
- Consumes only 400 mA at 5 VDC, allowing continuous operation with minimal heat generation.
Limitations:
- Slave-to-slave communication is not supported; data from slave ports is directed only to the master port.
- RS485 mode requires correct DIP switch configuration and wiring for optimal performance.
### 8. Standards & Compliance
Electrical and Safety Compliance:
- Designed in accordance with international standards for serial communication equipment.
- Supports RS232 (EIA/TIA-232), RS422 (EIA/TIA-422), and RS485 (EIA/TIA-485) interface standards.
- Power adapter complies with global AC input standards (100–240 VAC).
Environmental Compliance:
- Operates within industrial-grade temperature and humidity ranges.
- Suitable for use in controlled environments such as industrial automation panels, laboratories, and communication cabinets.
Quality and Manufacturing Standards:
- Manufactured by Rayon Technology Co., Ltd., a certified producer of industrial communication devices.
- All product names and trademarks are the property of their respective organizations.
### 9. Additional Information
Warranty:
Rayon Technology provides a standard manufacturer’s warranty covering defects in materials and workmanship. Warranty terms may vary by region and distributor.
Technical Support:
Technical assistance is available through Rayon’s support channels:
- Email: rayon@ms1.hinet.net
- Phone: +886-2-82858362
- Online resources and documentation available at [www.rayontech.com](http://www.rayontech.com)
Maintenance:
- The S234io requires minimal maintenance.
- Periodically inspect connectors and cables for wear or damage.
- Ensure adequate ventilation and avoid exposure to excessive dust or moisture.
Firmware and Updates:
The S234io operates as a hardware-based serial port sharer and does not require firmware updates. Configuration is entirely hardware-controlled via DIP switches.
Related Models in the S400 Series:
- S232: RS232 master to 3 RS232 slaves.
- S232o: RS232 master to 3 isolated RS232 slaves.
- S232io: Isolated RS232 master to 3 isolated RS232 slaves.
- S432i: Isolated RS422/485 master to 3 RS232 slaves.
- S432io: Isolated RS422/485 master to 3 isolated RS232 slaves.
- S434io: Isolated RS422/485 master to 3 isolated RS422/485 slaves.
- S234o: RS232 master to 3 isolated RS422/485 slaves.
- S234io: Isolated RS232 master to 3 isolated RS422/485 slaves (this model).
Product Identification:
Each unit is labeled with the model number (S234io), serial number, and manufacturer’s logo for traceability and quality assurance.
### Summary
The Rayon S234io Serial Port Sharer is a robust, industrial-grade communication interface device designed to extend and isolate serial communication networks. By enabling one isolated RS232 master port to communicate with three isolated RS422/485 slave ports, it provides a reliable and flexible solution for multi-drop serial communication systems. Its galvanic isolation, automatic data direction control, and compact design make it ideal for industrial automation, instrumentation, and control applications where signal integrity and electrical protection are critical.
With its combination of electrical isolation, flexible configuration, and ease of installation, the S234io stands as a versatile and dependable component in the S400 Series lineup, supporting a wide range of serial communication topologies and industrial integration requirements.
### 1. Product Overview
Product Name: Serial Port Sharer
Model: S234io
Series: S400 Series
Article Number: S234io
Manufacturer: Rayon Technology Co., Ltd.
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact:
- Tel: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net
- Web: [www.rayontech.com](http://www.rayontech.com) / [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)
Product Description:
The Rayon S234io is a high-performance, isolated serial port sharing device designed to connect one RS232 master port to three isolated RS422/485 slave ports. It enables simultaneous data distribution from a single master to multiple slave devices while maintaining electrical isolation between all communication channels. The S234io belongs to Rayon’s S400 Series of serial communication interface converters and port sharers, engineered for industrial, laboratory, and automation environments requiring robust, noise-immune serial data communication.
### 2. Key Features
- One-to-Three Port Sharing:
Allows one master device (RS232 interface) to communicate with up to three slave devices (RS422/485 interfaces) simultaneously.
- Full Electrical Isolation:
Both the master and slave ports are galvanically isolated, providing ground isolation between external devices and the S234io unit. This prevents ground loops and electrical interference, ensuring stable and reliable data transmission.
- Dual Isolation Architecture:
Supports double ground isolation between any two external devices, enhancing protection against voltage surges and signal noise.
- Flexible Interface Configuration:
The master port (Port A) operates as an isolated RS232 interface, while the three slave ports (Ports B, C, D) can be configured as isolated RS422 or RS485 interfaces via DIP switch selection.
- Auto Data Direction Control (RS485 Mode):
In RS485 mode, the S234io automatically manages data direction control, eliminating the need for manual RTS signal handling. TX+ and RX+ lines are shorted as DATA+, and TX– and RX– lines are shorted as DATA–.
- Simultaneous Data Distribution:
Data received from the master port (A) is broadcast to all three slave ports (B, C, D) simultaneously. Conversely, data from any slave port is transmitted only to the master port, ensuring controlled communication flow.
- LED Status Indicators:
Four independent LED indicators display power and data activity for each port, simplifying diagnostics and monitoring.
- Compact and Durable Design:
The S234io features a compact metal enclosure measuring 90 mm (W) × 150 mm (L) × 27 mm (H), suitable for desktop or panel-mounted installations.
- Universal Power Compatibility:
Operates with a wide-range AC input (100–240 VAC) through the UP110/UP220 power adapter, providing a regulated 5 VDC output.
- Low Power Consumption:
Typical current draw is 400 mA at 5 VDC, making it energy-efficient for continuous operation.
- Industrial-Grade Environmental Tolerance:
Designed for operation in environments with temperatures from 0°C to 55°C and humidity levels up to 95% RH.
### 3. Technical Specifications
Electrical & Interface Specifications:
| Parameter | Specification |
|------------|----------------|
| Master Port Interface | Isolated RS232 |
| Slave Port Interfaces | Isolated RS422/485 (configurable via DIP switch) |
| Number of Ports | 4 total (1 master + 3 slave) |
| Connector Type | DB9 male connectors (Ports A, B, C, D) |
| Signal Pins per Port | TX+, TX–, RX+, RX–, Isolated GND |
| Auto Data Direction Control | Supported in RS485 mode |
| Isolation Type | Ground isolation between all ports and external devices |
| Power Input | 5 VDC, 1000 mA (via UP110/UP220 adapter) |
| Power Adapter Input Range | 100–240 VAC, 50/60 Hz |
| Current Consumption | 400 mA @ 5 VDC |
| LED Indicators | PWR, ATRX, BTRX, CTRX, DTRX |
| Dimensions | 90 mm (W) × 150 mm (L) × 27 mm (H) |
| Weight | Approx. 250–300 g (typical for S400 series units) |
| Material | Metal enclosure (Rayon standard industrial housing) |
Environmental Conditions:
| Parameter | Specification |
|------------|----------------|
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | 0°C to 65°C |
| Operating Humidity | 10% to 95% RH (non-condensing) |
| Storage Humidity | 5% to 95% RH (non-condensing) |
### 4. Functionality
Operational Concept:
The S234io functions as a serial communication hub that allows a single RS232 master device (such as a PC, PLC, or controller) to communicate with up to three RS422/485 slave devices (such as sensors, actuators, or other serial peripherals). The device replicates data from the master port to all slave ports simultaneously, ensuring synchronized communication across multiple endpoints.
Data Flow Behavior:
- Master to Slaves: Data transmitted from the master port (A) is broadcast to all three slave ports (B, C, D) concurrently.
- Slaves to Master: Data from any slave port is directed exclusively to the master port, preventing cross-communication between slave devices.
Isolation and Signal Integrity:
Each port is galvanically isolated, providing protection against ground potential differences and electrical noise. This isolation ensures reliable operation in electrically noisy industrial environments and prevents damage to connected equipment.
Interface Configuration:
The slave ports can be configured as RS422 or RS485 using onboard DIP switches. In RS485 mode, the Auto-Data-Direction-Control feature automatically manages transmit and receive line switching, simplifying integration with half-duplex RS485 networks.
Use Cases and Applications:
- Industrial automation systems requiring multi-drop serial communication.
- Data acquisition systems where one controller must communicate with multiple sensors or instruments.
- Laboratory and test setups for simultaneous data logging from multiple devices.
- Building management systems (BMS) and HVAC control networks.
- SCADA and PLC-based control systems.
- Serial device sharing in manufacturing or process control environments.
Compatibility:
The S234io is compatible with standard RS232, RS422, and RS485 communication protocols and can interface with a wide range of industrial controllers, computers, and serial devices. It supports both full-duplex (RS422) and half-duplex (RS485) communication modes.
### 5. Components & Accessories
Included Items:
- S234io Serial Port Sharer main unit.
- UP110 or UP220 power adapter (region-specific):
- Input: 100–240 VAC, 50/60 Hz.
- Output: 5 VDC, 1000 mA.
- User manual and configuration guide.
- Mounting hardware (optional, depending on package).
Connectors:
- Four DB9 male connectors (Ports A–D).
- Each connector provides five signal pins: TX+, TX–, RX+, RX–, and isolated ground.
Optional Accessories:
- RS232/RS485/RS422 communication cables.
- DIN rail or panel mounting brackets.
- Extended power supply cables.
- USB-to-RS232 adapters for PC integration.
### 6. Installation & Setup
Power Requirements:
- The S234io requires a regulated 5 VDC power supply, typically provided by the included UP110/UP220 adapter.
- Ensure the adapter is connected to a stable AC source (100–240 VAC).
Mounting Options:
- The compact 90 × 150 × 27 mm enclosure allows for desktop placement or panel mounting.
- Optional DIN rail brackets can be used for industrial cabinet installations.
Configuration:
- DIP Switch Settings:
Each slave port can be configured as RS422 or RS485 using onboard DIP switches.
- RS485 Mode Setup:
When configured for RS485, short TX+ to RX+ (DATA+) and TX– to RX– (DATA–) to enable Auto-Data-Direction-Control.
- Connection Guidelines:
- Connect the master device to Port A (RS232).
- Connect slave devices to Ports B, C, and D (RS422/485).
- Ensure proper wiring polarity and grounding for each interface type.
LED Indicators:
- PWR: Illuminates when DC power is applied.
- ATRX: Indicates transmit/receive activity on master port A.
- BTRX, CTRX, DTRX: Indicate data activity on slave ports B, C, and D respectively.
Startup Procedure:
1. Connect all serial cables to the appropriate ports.
2. Apply power using the supplied adapter.
3. Verify LED indicators for power and communication activity.
4. Configure DIP switches as required for RS422 or RS485 operation.
5. Begin communication from the master device.
### 7. Performance & Capabilities
Communication Performance:
- Supports standard RS232, RS422, and RS485 signaling levels.
- Capable of high-speed serial data transmission (typical up to 115.2 kbps or higher depending on cable length and environment).
- Maintains signal integrity across all isolated channels.
Data Distribution Efficiency:
- Real-time data replication from master to all slave ports ensures synchronized communication.
- Low latency and minimal propagation delay between ports.
Isolation Performance:
- Provides galvanic isolation between all ports, reducing the risk of ground loops and electrical interference.
- Double isolation between external devices enhances system reliability in complex installations.
Power Efficiency:
- Consumes only 400 mA at 5 VDC, allowing continuous operation with minimal heat generation.
Limitations:
- Slave-to-slave communication is not supported; data from slave ports is directed only to the master port.
- RS485 mode requires correct DIP switch configuration and wiring for optimal performance.
### 8. Standards & Compliance
Electrical and Safety Compliance:
- Designed in accordance with international standards for serial communication equipment.
- Supports RS232 (EIA/TIA-232), RS422 (EIA/TIA-422), and RS485 (EIA/TIA-485) interface standards.
- Power adapter complies with global AC input standards (100–240 VAC).
Environmental Compliance:
- Operates within industrial-grade temperature and humidity ranges.
- Suitable for use in controlled environments such as industrial automation panels, laboratories, and communication cabinets.
Quality and Manufacturing Standards:
- Manufactured by Rayon Technology Co., Ltd., a certified producer of industrial communication devices.
- All product names and trademarks are the property of their respective organizations.
### 9. Additional Information
Warranty:
Rayon Technology provides a standard manufacturer’s warranty covering defects in materials and workmanship. Warranty terms may vary by region and distributor.
Technical Support:
Technical assistance is available through Rayon’s support channels:
- Email: rayon@ms1.hinet.net
- Phone: +886-2-82858362
- Online resources and documentation available at [www.rayontech.com](http://www.rayontech.com)
Maintenance:
- The S234io requires minimal maintenance.
- Periodically inspect connectors and cables for wear or damage.
- Ensure adequate ventilation and avoid exposure to excessive dust or moisture.
Firmware and Updates:
The S234io operates as a hardware-based serial port sharer and does not require firmware updates. Configuration is entirely hardware-controlled via DIP switches.
Related Models in the S400 Series:
- S232: RS232 master to 3 RS232 slaves.
- S232o: RS232 master to 3 isolated RS232 slaves.
- S232io: Isolated RS232 master to 3 isolated RS232 slaves.
- S432i: Isolated RS422/485 master to 3 RS232 slaves.
- S432io: Isolated RS422/485 master to 3 isolated RS232 slaves.
- S434io: Isolated RS422/485 master to 3 isolated RS422/485 slaves.
- S234o: RS232 master to 3 isolated RS422/485 slaves.
- S234io: Isolated RS232 master to 3 isolated RS422/485 slaves (this model).
Product Identification:
Each unit is labeled with the model number (S234io), serial number, and manufacturer’s logo for traceability and quality assurance.
### Summary
The Rayon S234io Serial Port Sharer is a robust, industrial-grade communication interface device designed to extend and isolate serial communication networks. By enabling one isolated RS232 master port to communicate with three isolated RS422/485 slave ports, it provides a reliable and flexible solution for multi-drop serial communication systems. Its galvanic isolation, automatic data direction control, and compact design make it ideal for industrial automation, instrumentation, and control applications where signal integrity and electrical protection are critical.
With its combination of electrical isolation, flexible configuration, and ease of installation, the S234io stands as a versatile and dependable component in the S400 Series lineup, supporting a wide range of serial communication topologies and industrial integration requirements.
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S234io_Catalog.pdf
PDF Catalog
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S400_Catalog.pdf
PDF Catalog
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