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- Dual Functionality: Combines 8 sourcing digital inputs and 8 sourcing digital outputs in a single module.
- Industrial Modbus Communication: Supports Modbus RTU and ASCII protocols via RS-485 (3-wire) interface, with baud rates from 1200 to 115.2 kbps.
- High Isolation: 3-way isolation protection—RS-485 isolation (3000 Vrms), field-to-logic isolation (5000 Vrms), and channel-to-channel isolation.
- Robust Electrical Protection: Overvoltage protection up to 70 VDC/Vp-p, surge and ESD immunity compliant with IEC61000-4-2/4/5 standards.
- Dual Watchdog System: Hardware and communication watchdogs ensure continuous operation and fail-safe output states during communication loss.
- Flexible Configuration: DIP switches for setting baud rate, Modbus address (1–63), and protocol type (RTU/ASCII).
- High-Speed Input Counting: Fast mode counter up to 300 Hz for pulse and frequency input applications.
- Programmable Logic Functions: Built-in I-to-O (input-to-output) mapping, ON/OFF latch, debounce, delay timers, pulse generation, and TPC (Time Proportion Control) output.
- DIN-Rail Mounting: Compact 132 × 125 × 47.5 mm enclosure with slide-out labeling panel for easy installation and maintenance.
- Wide Operating Range: Industrial temperature range from -30°C to +75°C and humidity tolerance of 5–90% non-condensing.
- Compatibility: Works seamlessly with SCADA software such as LabView, Wonderware, Citect, and Intellution.
- Industrial Modbus Communication: Supports Modbus RTU and ASCII protocols via RS-485 (3-wire) interface, with baud rates from 1200 to 115.2 kbps.
- High Isolation: 3-way isolation protection—RS-485 isolation (3000 Vrms), field-to-logic isolation (5000 Vrms), and channel-to-channel isolation.
- Robust Electrical Protection: Overvoltage protection up to 70 VDC/Vp-p, surge and ESD immunity compliant with IEC61000-4-2/4/5 standards.
- Dual Watchdog System: Hardware and communication watchdogs ensure continuous operation and fail-safe output states during communication loss.
- Flexible Configuration: DIP switches for setting baud rate, Modbus address (1–63), and protocol type (RTU/ASCII).
- High-Speed Input Counting: Fast mode counter up to 300 Hz for pulse and frequency input applications.
- Programmable Logic Functions: Built-in I-to-O (input-to-output) mapping, ON/OFF latch, debounce, delay timers, pulse generation, and TPC (Time Proportion Control) output.
- DIN-Rail Mounting: Compact 132 × 125 × 47.5 mm enclosure with slide-out labeling panel for easy installation and maintenance.
- Wide Operating Range: Industrial temperature range from -30°C to +75°C and humidity tolerance of 5–90% non-condensing.
- Compatibility: Works seamlessly with SCADA software such as LabView, Wonderware, Citect, and Intellution.
1. Product Overview
Product Name: 8/8 Channel 24VDC Digital Input/Output Module
Model: SM_DIO_116P
Series: SUNIX ioSCADA SM Series
Article Number: SM_DIO_116P
Manufacturer: Sunix Group
The SM_DIO_116P is a compact, industrial-grade Modbus I/O module designed for distributed control and data acquisition in SCADA, DCS, and PLC systems. It integrates eight digital input channels and eight digital output channels, each operating at 24VDC. The module supports both Modbus RTU and ASCII protocols over an RS-485 three-wire interface, enabling reliable communication across long distances and in electrically noisy environments. It is part of the SUNIX ioSCADA SM series, which includes a range of digital, analog, and counter/frequency modules optimized for industrial automation applications.
2. Key Features
- Dual Functionality: Combines 8 sourcing digital inputs and 8 sourcing digital outputs in a single module.
- Industrial Modbus Communication: Supports Modbus RTU and ASCII protocols via RS-485 (3-wire) interface, with baud rates from 1200 to 115.2 kbps.
- High Isolation: 3-way isolation protection—RS-485 isolation (3000 Vrms), field-to-logic isolation (5000 Vrms), and channel-to-channel isolation.
- Robust Electrical Protection: Overvoltage protection up to 70 VDC/Vp-p, surge and ESD immunity compliant with IEC61000-4-2/4/5 standards.
- Dual Watchdog System: Hardware and communication watchdogs ensure continuous operation and fail-safe output states during communication loss.
- Flexible Configuration: DIP switches for setting baud rate, Modbus address (1–63), and protocol type (RTU/ASCII).
- High-Speed Input Counting: Fast mode counter up to 300 Hz for pulse and frequency input applications.
- Programmable Logic Functions: Built-in I-to-O (input-to-output) mapping, ON/OFF latch, debounce, delay timers, pulse generation, and TPC (Time Proportion Control) output.
- DIN-Rail Mounting: Compact 132 × 125 × 47.5 mm enclosure with slide-out labeling panel for easy installation and maintenance.
- Wide Operating Range: Industrial temperature range from -30°C to +75°C and humidity tolerance of 5–90% non-condensing.
- Compatibility: Works seamlessly with SCADA software such as LabView, Wonderware, Citect, and Intellution.
3. Technical Specifications
Electrical Characteristics
- Input Channels: 8 sourcing inputs
- Output Channels: 8 sourcing outputs
- Input Resistance: 4.7 kΩ typical
- Input Voltage Range: 0–35 VDC (max)
- Input Current: 5.1 mA typical at 24 VDC
- Logic Levels: OFF < 4 VDC, ON > 10 VDC
- Input Response Time: ≤ 1 ms
- Fast Mode Count: 300 Hz
- Output Type: Sourcing, non-latching
- Output On Resistance: ≤ 0.28 Ω
- Continuous Output Current: 500 mA per channel
- Supply Voltage Range: 10–35 VDC
- Output Response Time: ≤ 10 ms (Force Coil command)
- Output Protection: 4A fuse, inductive load protection
- Max Lamp Load: 5 W @ 24 VDC
- Max Inductive Load: 0.2 H (3 A @ 24 VDC)
- Leakage Current (OFF): ≤ 100 nA
- Typical ON Voltage (1 A): 1 V
Isolation & Protection
- Field-to-Logic Isolation: 5 kVrms
- RS-485 Isolation: 3 kVrms
- Channel-to-Channel Isolation: Yes
- Overvoltage Protection: 70 VDC/Vp-p
- Network Isolation Voltage: 3 kVrms
Mechanical & Environmental
- Dimensions: 132 × 125 × 47.5 mm
- Mounting: DIN-rail or panel mount
- Weight: Approx. 0.5 kg
- Operating Temperature: -30°C to +75°C
- Storage Temperature: -45°C to +85°C
- Humidity: 5–90% RH, non-condensing
Power Consumption:
- Typical 0.0547 A @ 24 VDC
- Minimum 0.0461 A @ 30 VDC
- Maximum 0.1435 A @ 10 VDC
4. Functionality
The SM_DIO_116P serves as a distributed I/O node in Modbus-based control networks. It collects digital input signals from sensors, switches, or field devices and controls actuators, relays, or indicators through its digital outputs. Communication with a host controller (SCADA, PLC, or DCS) occurs via RS-485 using Modbus RTU or ASCII protocols.
Use Cases:
- Industrial automation and process control
- Remote I/O expansion for PLCs and DCS systems
- SCADA-based monitoring and control
- Alarm interlock and safety control systems
- Machine status monitoring and event counting
Compatibility:
Fully compatible with standard Modbus masters and SCADA software platforms. The module can operate autonomously with built-in logic functions such as I-to-O mapping, allowing it to maintain control even if communication is lost.
5. Components & Accessories
Included Items:
- SM_DIO_116P module
- DIN-rail mounting kit
- Installation CD with ioCFG configuration software
- Quick installation guide
Optional Accessories:
- RS-232/RS-485 isolation converter
- RS-485 repeater (for networks >1200 m)
- Cold-junction compensation wiring (for analog modules in the same series)
Connectors:
- Removable terminal blocks for I/O, power, and communication
- Wiring range: 16–24 AWG
6. Installation & Setup
Requirements:
- Power supply: 10–30 VDC industrial-grade, compliant with IEC61000-4-4 2kV
- Host system: PC, PLC, PAC, or DCS with Modbus RTU/ASCII capability
- Communication: RS-485 shielded twisted pair (Data+, Data-, COM)
Configuration:
- Baud Rate: Selectable via DIP switch (1200–115.2k bps, default 115.2k)
- Address: 1–63 (set via DIP switch, default 1)
- Protocol Selection: RTU (OFF) or ASCII (ON) via DIP switch
- Factory Reset: DIP7 (INIT) switch procedure for restoring defaults
Mounting Options:
- DIN-rail (horizontal or vertical orientation)
- Panel mounting with included accessories
LED Indicators:
- PWR: Power status
- RX/TX: Communication activity
- IO_ACC: CPU operation status
- Rt_ON: RS-485 termination resistor status
Software Setup:
- Configuration via ioCFG Windows utility (auto-detects modules, supports upload/download of parameters).
- Supports online/offline editing, EEPROM saving, and real-time monitoring.
7. Performance & Capabilities
- Communication Distance: Up to 4000 ft (1200 m) without repeater
- Maximum Nodes: 63 modules per RS-485 segment
- Data Throughput: Up to 115.2 kbps
- Input Counting: 300 Hz pulse counting capability
- Output Timing: Programmable ON/OFF delays (0–65535 s, 1 s resolution)
- Debounce Filtering: 0–65535 ms (5 ms resolution)
- TPC Output: 0–100% duty cycle, 0.1–300 s period
- Fail-Safe Mode: User-defined output state during communication loss
- Response Time: ≤10 ms for output updates
- Timer Accuracy: ±1%
Limitations:
- Maximum 500 mA per output channel
- Total output current limited by 4A fuse protection
- Communication limited to 48 registers per Modbus message
8. Standards & Compliance
Electrical & EMC Compliance:
- EFT Immunity: IEC61000-4-4 Level 3 (power and signal lines)
- ESD Immunity: IEC61000-4-2 Level 3 (8 kV air / 4 kV contact)
- Surge Immunity: IEC61000-4-5 (0.5 kV)
- CE Compliant: Yes
Isolation & Safety:
- RS-485 isolation: 3000 Vrms
- Field-to-logic isolation: 5000 Vrms
- Channel-to-channel isolation: Yes
Communication Standards:
- Modbus RTU/ASCII over RS-485 (EIA/TIA-485 compliant)
- Data format: 8 data bits, no parity, 1 stop bit
Supported Modbus Function Codes:
1 – Read Coil Status
2 – Read Input Status
3 – Read Holding Registers
4 – Read Input Registers
5 – Force Single Coil
6 – Preset Single Register
8 – Loopback Command
15 – Force Multiple Coils
16 – Preset Multiple Registers
17 – Report Slave ID
9. Additional Information
Warranty:
- 2 years from delivery or 1 year after installation (whichever comes first).
- Covers manufacturing defects under normal operating conditions.
- Excludes damage from misuse, improper installation, or environmental conditions beyond specifications.
Service Policy:
- Free repair, testing, and adjustment during warranty period (shipping costs borne by customer).
- Post-warranty repairs charged at approximately 25% of product price.
- RMA authorization required for returns.
Maintenance:
- Periodic inspection of terminal connections and fuses recommended.
- Ensure proper grounding (PE) and shielding for RS-485 network integrity.
- Firmware updates and configuration backups can be managed via ioCFG software.
Support & Documentation:
- Comprehensive user manual and Modbus register map included.
- Technical support available through Sunix Group’s service channels.
- Compatible with Modbus diagnostic tools and third-party SCADA software.
Summary
The Sunix SM_DIO_116P is a versatile, high-reliability digital I/O module engineered for industrial automation and SCADA systems. It combines robust electrical design, flexible configuration, and intelligent control features in a compact DIN-rail form factor. With its dual watchdogs, 3-way isolation, and full Modbus RTU/ASCII support, it ensures dependable operation in harsh environments such as power plants, steel manufacturing, and petrochemical facilities. The module’s programmable logic functions—debounce, delay, latch, pulse, and I-to-O mapping—enable autonomous control and safety interlocks, making it a powerful component for distributed control architectures.
Product Name: 8/8 Channel 24VDC Digital Input/Output Module
Model: SM_DIO_116P
Series: SUNIX ioSCADA SM Series
Article Number: SM_DIO_116P
Manufacturer: Sunix Group
The SM_DIO_116P is a compact, industrial-grade Modbus I/O module designed for distributed control and data acquisition in SCADA, DCS, and PLC systems. It integrates eight digital input channels and eight digital output channels, each operating at 24VDC. The module supports both Modbus RTU and ASCII protocols over an RS-485 three-wire interface, enabling reliable communication across long distances and in electrically noisy environments. It is part of the SUNIX ioSCADA SM series, which includes a range of digital, analog, and counter/frequency modules optimized for industrial automation applications.
2. Key Features
- Dual Functionality: Combines 8 sourcing digital inputs and 8 sourcing digital outputs in a single module.
- Industrial Modbus Communication: Supports Modbus RTU and ASCII protocols via RS-485 (3-wire) interface, with baud rates from 1200 to 115.2 kbps.
- High Isolation: 3-way isolation protection—RS-485 isolation (3000 Vrms), field-to-logic isolation (5000 Vrms), and channel-to-channel isolation.
- Robust Electrical Protection: Overvoltage protection up to 70 VDC/Vp-p, surge and ESD immunity compliant with IEC61000-4-2/4/5 standards.
- Dual Watchdog System: Hardware and communication watchdogs ensure continuous operation and fail-safe output states during communication loss.
- Flexible Configuration: DIP switches for setting baud rate, Modbus address (1–63), and protocol type (RTU/ASCII).
- High-Speed Input Counting: Fast mode counter up to 300 Hz for pulse and frequency input applications.
- Programmable Logic Functions: Built-in I-to-O (input-to-output) mapping, ON/OFF latch, debounce, delay timers, pulse generation, and TPC (Time Proportion Control) output.
- DIN-Rail Mounting: Compact 132 × 125 × 47.5 mm enclosure with slide-out labeling panel for easy installation and maintenance.
- Wide Operating Range: Industrial temperature range from -30°C to +75°C and humidity tolerance of 5–90% non-condensing.
- Compatibility: Works seamlessly with SCADA software such as LabView, Wonderware, Citect, and Intellution.
3. Technical Specifications
Electrical Characteristics
- Input Channels: 8 sourcing inputs
- Output Channels: 8 sourcing outputs
- Input Resistance: 4.7 kΩ typical
- Input Voltage Range: 0–35 VDC (max)
- Input Current: 5.1 mA typical at 24 VDC
- Logic Levels: OFF < 4 VDC, ON > 10 VDC
- Input Response Time: ≤ 1 ms
- Fast Mode Count: 300 Hz
- Output Type: Sourcing, non-latching
- Output On Resistance: ≤ 0.28 Ω
- Continuous Output Current: 500 mA per channel
- Supply Voltage Range: 10–35 VDC
- Output Response Time: ≤ 10 ms (Force Coil command)
- Output Protection: 4A fuse, inductive load protection
- Max Lamp Load: 5 W @ 24 VDC
- Max Inductive Load: 0.2 H (3 A @ 24 VDC)
- Leakage Current (OFF): ≤ 100 nA
- Typical ON Voltage (1 A): 1 V
Isolation & Protection
- Field-to-Logic Isolation: 5 kVrms
- RS-485 Isolation: 3 kVrms
- Channel-to-Channel Isolation: Yes
- Overvoltage Protection: 70 VDC/Vp-p
- Network Isolation Voltage: 3 kVrms
Mechanical & Environmental
- Dimensions: 132 × 125 × 47.5 mm
- Mounting: DIN-rail or panel mount
- Weight: Approx. 0.5 kg
- Operating Temperature: -30°C to +75°C
- Storage Temperature: -45°C to +85°C
- Humidity: 5–90% RH, non-condensing
Power Consumption:
- Typical 0.0547 A @ 24 VDC
- Minimum 0.0461 A @ 30 VDC
- Maximum 0.1435 A @ 10 VDC
4. Functionality
The SM_DIO_116P serves as a distributed I/O node in Modbus-based control networks. It collects digital input signals from sensors, switches, or field devices and controls actuators, relays, or indicators through its digital outputs. Communication with a host controller (SCADA, PLC, or DCS) occurs via RS-485 using Modbus RTU or ASCII protocols.
Use Cases:
- Industrial automation and process control
- Remote I/O expansion for PLCs and DCS systems
- SCADA-based monitoring and control
- Alarm interlock and safety control systems
- Machine status monitoring and event counting
Compatibility:
Fully compatible with standard Modbus masters and SCADA software platforms. The module can operate autonomously with built-in logic functions such as I-to-O mapping, allowing it to maintain control even if communication is lost.
5. Components & Accessories
Included Items:
- SM_DIO_116P module
- DIN-rail mounting kit
- Installation CD with ioCFG configuration software
- Quick installation guide
Optional Accessories:
- RS-232/RS-485 isolation converter
- RS-485 repeater (for networks >1200 m)
- Cold-junction compensation wiring (for analog modules in the same series)
Connectors:
- Removable terminal blocks for I/O, power, and communication
- Wiring range: 16–24 AWG
6. Installation & Setup
Requirements:
- Power supply: 10–30 VDC industrial-grade, compliant with IEC61000-4-4 2kV
- Host system: PC, PLC, PAC, or DCS with Modbus RTU/ASCII capability
- Communication: RS-485 shielded twisted pair (Data+, Data-, COM)
Configuration:
- Baud Rate: Selectable via DIP switch (1200–115.2k bps, default 115.2k)
- Address: 1–63 (set via DIP switch, default 1)
- Protocol Selection: RTU (OFF) or ASCII (ON) via DIP switch
- Factory Reset: DIP7 (INIT) switch procedure for restoring defaults
Mounting Options:
- DIN-rail (horizontal or vertical orientation)
- Panel mounting with included accessories
LED Indicators:
- PWR: Power status
- RX/TX: Communication activity
- IO_ACC: CPU operation status
- Rt_ON: RS-485 termination resistor status
Software Setup:
- Configuration via ioCFG Windows utility (auto-detects modules, supports upload/download of parameters).
- Supports online/offline editing, EEPROM saving, and real-time monitoring.
7. Performance & Capabilities
- Communication Distance: Up to 4000 ft (1200 m) without repeater
- Maximum Nodes: 63 modules per RS-485 segment
- Data Throughput: Up to 115.2 kbps
- Input Counting: 300 Hz pulse counting capability
- Output Timing: Programmable ON/OFF delays (0–65535 s, 1 s resolution)
- Debounce Filtering: 0–65535 ms (5 ms resolution)
- TPC Output: 0–100% duty cycle, 0.1–300 s period
- Fail-Safe Mode: User-defined output state during communication loss
- Response Time: ≤10 ms for output updates
- Timer Accuracy: ±1%
Limitations:
- Maximum 500 mA per output channel
- Total output current limited by 4A fuse protection
- Communication limited to 48 registers per Modbus message
8. Standards & Compliance
Electrical & EMC Compliance:
- EFT Immunity: IEC61000-4-4 Level 3 (power and signal lines)
- ESD Immunity: IEC61000-4-2 Level 3 (8 kV air / 4 kV contact)
- Surge Immunity: IEC61000-4-5 (0.5 kV)
- CE Compliant: Yes
Isolation & Safety:
- RS-485 isolation: 3000 Vrms
- Field-to-logic isolation: 5000 Vrms
- Channel-to-channel isolation: Yes
Communication Standards:
- Modbus RTU/ASCII over RS-485 (EIA/TIA-485 compliant)
- Data format: 8 data bits, no parity, 1 stop bit
Supported Modbus Function Codes:
1 – Read Coil Status
2 – Read Input Status
3 – Read Holding Registers
4 – Read Input Registers
5 – Force Single Coil
6 – Preset Single Register
8 – Loopback Command
15 – Force Multiple Coils
16 – Preset Multiple Registers
17 – Report Slave ID
9. Additional Information
Warranty:
- 2 years from delivery or 1 year after installation (whichever comes first).
- Covers manufacturing defects under normal operating conditions.
- Excludes damage from misuse, improper installation, or environmental conditions beyond specifications.
Service Policy:
- Free repair, testing, and adjustment during warranty period (shipping costs borne by customer).
- Post-warranty repairs charged at approximately 25% of product price.
- RMA authorization required for returns.
Maintenance:
- Periodic inspection of terminal connections and fuses recommended.
- Ensure proper grounding (PE) and shielding for RS-485 network integrity.
- Firmware updates and configuration backups can be managed via ioCFG software.
Support & Documentation:
- Comprehensive user manual and Modbus register map included.
- Technical support available through Sunix Group’s service channels.
- Compatible with Modbus diagnostic tools and third-party SCADA software.
Summary
The Sunix SM_DIO_116P is a versatile, high-reliability digital I/O module engineered for industrial automation and SCADA systems. It combines robust electrical design, flexible configuration, and intelligent control features in a compact DIN-rail form factor. With its dual watchdogs, 3-way isolation, and full Modbus RTU/ASCII support, it ensures dependable operation in harsh environments such as power plants, steel manufacturing, and petrochemical facilities. The module’s programmable logic functions—debounce, delay, latch, pulse, and I-to-O mapping—enable autonomous control and safety interlocks, making it a powerful component for distributed control architectures.
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ModBus-IO-Modules.pdf
PDF Catalog
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ioSCADA-Series_manual_En.pdf
Manual
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