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- Dual Differential Analog Outputs: Two isolated channels supporting both current and voltage output modes.
- Flexible Output Ranges: Configurable for 0–20 mA, 4–20 mA, or 0–10 V operation.
- High Accuracy and Resolution: 12-bit resolution (1 part in 4095) with ±0.1% output accuracy at 25°C.
- Fast Response: Typical response time of 10 ms into 500 Ω load to reach 98% of final value.
- 3-Way Isolation Protection: 3000 Vrms isolation between RS-485, logic, and field sides, ensuring high noise immunity.
- Fail-Safe and Watchdog Protection: Hardware and communication watchdogs maintain safe output states during communication loss or hardware faults.
- Ramp (Slope) Control: Programmable slope output for smooth transitions between output levels, ideal for ramp/soak control applications.
- Output Clamp Function: Configurable high and low output limits to protect connected devices.
- Auto/Manual Bumpless Transfer: Seamless switching between automatic and manual control modes without output discontinuity.
- DIN-Rail Mountable Industrial Design: Compact, rugged enclosure (132 × 125 × 47.5 mm) for easy installation in control panels.
- Wide Operating Temperature Range: -30°C to +75°C for harsh industrial environments.
- Standard Modbus Compatibility: Fully compliant with Modbus RTU/ASCII, compatible with most SCADA and PLC systems.
- User-Friendly LED Indicators: Power, communication (TX/RX), and I/O status LEDs for quick diagnostics.
- Network Scalability: Supports up to 63 modules on a single RS-485 bus without repeaters, up to 4000 ft (1200 m) network distance.
- Flexible Output Ranges: Configurable for 0–20 mA, 4–20 mA, or 0–10 V operation.
- High Accuracy and Resolution: 12-bit resolution (1 part in 4095) with ±0.1% output accuracy at 25°C.
- Fast Response: Typical response time of 10 ms into 500 Ω load to reach 98% of final value.
- 3-Way Isolation Protection: 3000 Vrms isolation between RS-485, logic, and field sides, ensuring high noise immunity.
- Fail-Safe and Watchdog Protection: Hardware and communication watchdogs maintain safe output states during communication loss or hardware faults.
- Ramp (Slope) Control: Programmable slope output for smooth transitions between output levels, ideal for ramp/soak control applications.
- Output Clamp Function: Configurable high and low output limits to protect connected devices.
- Auto/Manual Bumpless Transfer: Seamless switching between automatic and manual control modes without output discontinuity.
- DIN-Rail Mountable Industrial Design: Compact, rugged enclosure (132 × 125 × 47.5 mm) for easy installation in control panels.
- Wide Operating Temperature Range: -30°C to +75°C for harsh industrial environments.
- Standard Modbus Compatibility: Fully compliant with Modbus RTU/ASCII, compatible with most SCADA and PLC systems.
- User-Friendly LED Indicators: Power, communication (TX/RX), and I/O status LEDs for quick diagnostics.
- Network Scalability: Supports up to 63 modules on a single RS-485 bus without repeaters, up to 4000 ft (1200 m) network distance.
Comprehensive Product Summary – SUNIX ioSCADA SM_AO_102i
### 1. Product Overview
Product Name: 2-Channel Differential D/A Voltage/Current Output Module
Model: SM_AO_102i
Series: SUNIX ioSCADA SM Series – Industrial Modbus I/O Modules
Article Number: SM_AO_102i
Manufacturer: Sunix Group
The SM_AO_102i is a high-performance, industrial-grade analog output module designed for distributed control and data acquisition systems. It belongs to the SUNIX ioSCADA SM series, a family of modular I/O devices supporting the Modbus RTU and ASCII protocols over RS-485 communication. The module provides two differential analog output channels capable of delivering both current (0–20 mA, 4–20 mA) and voltage (0–10 V) signals, making it suitable for a wide range of industrial automation, process control, and SCADA applications.
### 2. Key Features
- Dual Differential Analog Outputs: Two isolated channels supporting both current and voltage output modes.
- Flexible Output Ranges: Configurable for 0–20 mA, 4–20 mA, or 0–10 V operation.
- High Accuracy and Resolution: 12-bit resolution (1 part in 4095) with ±0.1% output accuracy at 25°C.
- Fast Response: Typical response time of 10 ms into 500 Ω load to reach 98% of final value.
- 3-Way Isolation Protection: 3000 Vrms isolation between RS-485, logic, and field sides, ensuring high noise immunity.
- Fail-Safe and Watchdog Protection: Hardware and communication watchdogs maintain safe output states during communication loss or hardware faults.
- Ramp (Slope) Control: Programmable slope output for smooth transitions between output levels, ideal for ramp/soak control applications.
- Output Clamp Function: Configurable high and low output limits to protect connected devices.
- Auto/Manual Bumpless Transfer: Seamless switching between automatic and manual control modes without output discontinuity.
- DIN-Rail Mountable Industrial Design: Compact, rugged enclosure (132 × 125 × 47.5 mm) for easy installation in control panels.
- Wide Operating Temperature Range: -30°C to +75°C for harsh industrial environments.
- Standard Modbus Compatibility: Fully compliant with Modbus RTU/ASCII, compatible with most SCADA and PLC systems.
- User-Friendly LED Indicators: Power, communication (TX/RX), and I/O status LEDs for quick diagnostics.
- Network Scalability: Supports up to 63 modules on a single RS-485 bus without repeaters, up to 4000 ft (1200 m) network distance.
### 3. Technical Specifications
Electrical & Signal Characteristics
- Output Channels: 2 differential
- Output Ranges:
- Current: 0–20 mA, 4–20 mA
- Voltage: 0–10 V
- Resolution: 12-bit (1 part in 4095)
- Accuracy: ±0.1% of output range @ 25°C
- Temperature Coefficient: Better than ±0.005% of span per °C or ±1.0 µV/°C
- Response Time: 10 ms typical (98% of final value into 500 Ω load)
- Maximum Output Current: 20.5 mA DC typical
- Current Output Compliance Voltage: 10.5 V typical
- Load Resistance (Current Mode): 0–500 Ω typical
- Maximum Output Voltage: 10.5 V DC typical
- Voltage Output Current (Voltage Mode): 0–10.5 mA DC max
- Voltage Output Impedance: 1 kΩ
- Short-Circuit Protection: Integrated
Power Requirements
- Supply Voltage: 10–30 V DC
- Typical Power Consumption: 0.1361 A @ 24 V DC (approx. 3.27 W)
Physical Characteristics
- Dimensions: 132 × 125 × 47.5 mm
- Mounting: DIN-rail or panel mount
- Weight: Approx. 0.5 kg (typical)
- Enclosure: Industrial-grade plastic housing with removable terminal blocks
Environmental Conditions
- Operating Temperature: -30°C to +75°C
- Storage Temperature: -45°C to +85°C
- Relative Humidity: 5–90%, non-condensing
Isolation & Protection
- Network Isolation Voltage: 3000 Vrms
- Field-to-Logic Isolation: 3000 Vrms
- Channel-to-Channel Isolation: Yes
- Overvoltage Protection: 70 V DC/Vp-p
### 4. Functionality
The SM_AO_102i functions as a Modbus slave device on an RS-485 network, providing analog output signals to actuators, control valves, or other field devices. Each channel can be independently configured for current or voltage output via software. The module’s internal microcontroller manages signal generation, scaling, and communication with the host system.
Typical Use Cases:
- Process control loops (e.g., PID control for temperature, pressure, or flow)
- Analog actuator control (valves, drives, dampers)
- SCADA and DCS analog output expansion
- Industrial automation requiring precise analog signal generation
- Laboratory and test equipment requiring isolated analog outputs
Compatibility:
- Fully compatible with Modbus RTU/ASCII master devices such as PLCs, PACs, DCS systems, and SCADA software (e.g., Wonderware, LabView, Citect, Intellution).
- Works seamlessly with other SUNIX ioSCADA modules (AI, DI, DO, RTD, UI, CNT).
### 5. Components & Accessories
Included Items:
- SM_AO_102i module
- DIN-rail mounting accessory kit
- Installation CD with ioCFG configuration software
- Quick installation guide
Optional Accessories:
- RS-232/RS-485 isolation converter
- RS-485 repeater (for networks exceeding 1200 m)
- Shielded twisted-pair communication cables (16–24 AWG)
Connectors:
- Removable terminal blocks for power, communication, and I/O connections
- RS-485 interface: 3-wire (Data+, Data–, COM)
### 6. Installation & Setup
Mounting Options:
- DIN-rail (horizontal or vertical orientation)
- Panel mounting (front or back)
Configuration:
- DIP Switches:
- SW-1: Baud rate and protocol selection (RTU/ASCII)
- SW-2: Modbus slave address (1–63) and factory reset (INIT)
- Default Settings:
- Baud rate: 115.2 kbps
- Parity: None
- Data bits: 8
- Stop bits: 1
- Slave address: 1
Communication Interface:
- Protocol: Modbus RTU/ASCII
- Baud Rates: 1200, 2400, 4800, 9600, 19.2k, 38.4k, 57.6k, 115.2k bps
- Network Distance: Up to 4000 ft (1200 m) without repeater
- Maximum Nodes: 63 modules per RS-485 segment
Software Configuration:
- ioCFG Utility (Windows®):
- Used for module detection, configuration, and monitoring
- Supports parameter upload/download and EEPROM storage
- Provides real-time data visualization and simulation mode
LED Indicators:
- PWR: Power status
- RX/TX: Communication activity
- IO_ACC: Module operation status
- Rt_ON: RS-485 termination resistor status
Factory Reset Procedure:
1. Power off the module.
2. Set DIP switch SW-2, pin 7 (INIT) to ON.
3. Power on the module.
4. Return DIP switch to OFF within 5 seconds to restore defaults.
### 7. Performance & Capabilities
Analog Output Performance:
- Resolution: 12-bit (4096 steps)
- Accuracy: ±0.1% of full scale
- Response Time: 10 ms typical
- Temperature Drift: < ±0.005%/°C
- Load Capability: 0–500 Ω (current mode), 1 kΩ output impedance (voltage mode)
- Output Protection: Short-circuit and overcurrent protection
Communication Performance:
- Protocol Support: Modbus RTU and ASCII
- Supported Function Codes:
- 01: Read Coil Status
- 02: Read Input Status
- 03: Read Holding Registers
- 04: Read Input Registers
- 05: Force Single Coil
- 06: Preset Single Register
- 08: Loopback Command
- 15: Force Multiple Coils
- 16: Preset Multiple Registers
- 17: Report Slave ID
- Maximum Data Length: 48 words per RTU message (24 words per ASCII message)
Reliability & Safety:
- Dual Watchdog System:
- Hardware watchdog resets CPU on fault.
- Communication watchdog ensures safe output state during network failure.
- Fail-Safe Operation:
- User-defined safe output values during communication loss.
- MTBF: High mean time between failures due to industrial-grade components.
Limitations:
- Maximum of two analog output channels per module.
- Not designed for human life-support or safety-critical applications.
### 8. Standards & Compliance
Electrical & EMC Compliance:
- CE Certified
- 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)
Isolation & Protection:
- RS-485 Isolation: 3000 Vrms
- Field-to-Logic Isolation: 3000 Vrms
- Channel-to-Channel Isolation: Yes
- Overvoltage Protection: 70 V DC/Vp-p
Environmental Standards:
- Designed for industrial environments with high EMI/RFI immunity.
- Operating temperature range compliant with industrial-grade specifications.
Communication Standards:
- Modbus RTU/ASCII over RS-485 (EIA/TIA-485 standard)
- Network Topology: Multi-drop, up to 63 nodes without repeater
### 9. Additional Information
Warranty:
- Duration: 2 years from delivery or 1 year after installation (whichever comes first)
- Coverage: Manufacturing defects under normal operation
- Exclusions: Damage due to misuse, improper installation, or operation outside specifications
Service Policy:
- Free repair, testing, and adjustment during warranty period (shipping costs borne by customer).
- Post-warranty repairs available at approximately 25% of product price.
- RMA (Return Material Authorization) required for all returns.
Maintenance:
- Periodic inspection of wiring and terminal connections recommended.
- Keep module clean and free from dust or moisture.
- Avoid exposure to corrosive gases or excessive vibration.
Software & Firmware Updates:
- ioCFG configuration software updates available via Sunix support.
- Firmware updates may be released to enhance performance or compatibility.
Support Resources:
- Website: [www.sunix.com](http://www.sunix.com)
- Technical Forum: SUNIX Tech Forum for ioSCADA users
- Documentation: ioSCADA User’s Manual, Modbus Register Map, and Configuration Guide
### Summary
The SUNIX SM_AO_102i is a robust, high-precision 2-channel analog output module engineered for industrial automation and SCADA systems. With its 12-bit resolution, wide output range, and industrial-grade isolation, it ensures reliable analog signal generation even in electrically noisy environments. The module’s Modbus RTU/ASCII compatibility, hardware and communication watchdogs, and fail-safe mechanisms make it a dependable choice for distributed control architectures. Its DIN-rail mount design, user-friendly configuration, and comprehensive protection features position it as an ideal solution for process control, data acquisition, and remote I/O expansion in demanding industrial applications.
### 1. Product Overview
Product Name: 2-Channel Differential D/A Voltage/Current Output Module
Model: SM_AO_102i
Series: SUNIX ioSCADA SM Series – Industrial Modbus I/O Modules
Article Number: SM_AO_102i
Manufacturer: Sunix Group
The SM_AO_102i is a high-performance, industrial-grade analog output module designed for distributed control and data acquisition systems. It belongs to the SUNIX ioSCADA SM series, a family of modular I/O devices supporting the Modbus RTU and ASCII protocols over RS-485 communication. The module provides two differential analog output channels capable of delivering both current (0–20 mA, 4–20 mA) and voltage (0–10 V) signals, making it suitable for a wide range of industrial automation, process control, and SCADA applications.
### 2. Key Features
- Dual Differential Analog Outputs: Two isolated channels supporting both current and voltage output modes.
- Flexible Output Ranges: Configurable for 0–20 mA, 4–20 mA, or 0–10 V operation.
- High Accuracy and Resolution: 12-bit resolution (1 part in 4095) with ±0.1% output accuracy at 25°C.
- Fast Response: Typical response time of 10 ms into 500 Ω load to reach 98% of final value.
- 3-Way Isolation Protection: 3000 Vrms isolation between RS-485, logic, and field sides, ensuring high noise immunity.
- Fail-Safe and Watchdog Protection: Hardware and communication watchdogs maintain safe output states during communication loss or hardware faults.
- Ramp (Slope) Control: Programmable slope output for smooth transitions between output levels, ideal for ramp/soak control applications.
- Output Clamp Function: Configurable high and low output limits to protect connected devices.
- Auto/Manual Bumpless Transfer: Seamless switching between automatic and manual control modes without output discontinuity.
- DIN-Rail Mountable Industrial Design: Compact, rugged enclosure (132 × 125 × 47.5 mm) for easy installation in control panels.
- Wide Operating Temperature Range: -30°C to +75°C for harsh industrial environments.
- Standard Modbus Compatibility: Fully compliant with Modbus RTU/ASCII, compatible with most SCADA and PLC systems.
- User-Friendly LED Indicators: Power, communication (TX/RX), and I/O status LEDs for quick diagnostics.
- Network Scalability: Supports up to 63 modules on a single RS-485 bus without repeaters, up to 4000 ft (1200 m) network distance.
### 3. Technical Specifications
Electrical & Signal Characteristics
- Output Channels: 2 differential
- Output Ranges:
- Current: 0–20 mA, 4–20 mA
- Voltage: 0–10 V
- Resolution: 12-bit (1 part in 4095)
- Accuracy: ±0.1% of output range @ 25°C
- Temperature Coefficient: Better than ±0.005% of span per °C or ±1.0 µV/°C
- Response Time: 10 ms typical (98% of final value into 500 Ω load)
- Maximum Output Current: 20.5 mA DC typical
- Current Output Compliance Voltage: 10.5 V typical
- Load Resistance (Current Mode): 0–500 Ω typical
- Maximum Output Voltage: 10.5 V DC typical
- Voltage Output Current (Voltage Mode): 0–10.5 mA DC max
- Voltage Output Impedance: 1 kΩ
- Short-Circuit Protection: Integrated
Power Requirements
- Supply Voltage: 10–30 V DC
- Typical Power Consumption: 0.1361 A @ 24 V DC (approx. 3.27 W)
Physical Characteristics
- Dimensions: 132 × 125 × 47.5 mm
- Mounting: DIN-rail or panel mount
- Weight: Approx. 0.5 kg (typical)
- Enclosure: Industrial-grade plastic housing with removable terminal blocks
Environmental Conditions
- Operating Temperature: -30°C to +75°C
- Storage Temperature: -45°C to +85°C
- Relative Humidity: 5–90%, non-condensing
Isolation & Protection
- Network Isolation Voltage: 3000 Vrms
- Field-to-Logic Isolation: 3000 Vrms
- Channel-to-Channel Isolation: Yes
- Overvoltage Protection: 70 V DC/Vp-p
### 4. Functionality
The SM_AO_102i functions as a Modbus slave device on an RS-485 network, providing analog output signals to actuators, control valves, or other field devices. Each channel can be independently configured for current or voltage output via software. The module’s internal microcontroller manages signal generation, scaling, and communication with the host system.
Typical Use Cases:
- Process control loops (e.g., PID control for temperature, pressure, or flow)
- Analog actuator control (valves, drives, dampers)
- SCADA and DCS analog output expansion
- Industrial automation requiring precise analog signal generation
- Laboratory and test equipment requiring isolated analog outputs
Compatibility:
- Fully compatible with Modbus RTU/ASCII master devices such as PLCs, PACs, DCS systems, and SCADA software (e.g., Wonderware, LabView, Citect, Intellution).
- Works seamlessly with other SUNIX ioSCADA modules (AI, DI, DO, RTD, UI, CNT).
### 5. Components & Accessories
Included Items:
- SM_AO_102i module
- DIN-rail mounting accessory kit
- Installation CD with ioCFG configuration software
- Quick installation guide
Optional Accessories:
- RS-232/RS-485 isolation converter
- RS-485 repeater (for networks exceeding 1200 m)
- Shielded twisted-pair communication cables (16–24 AWG)
Connectors:
- Removable terminal blocks for power, communication, and I/O connections
- RS-485 interface: 3-wire (Data+, Data–, COM)
### 6. Installation & Setup
Mounting Options:
- DIN-rail (horizontal or vertical orientation)
- Panel mounting (front or back)
Configuration:
- DIP Switches:
- SW-1: Baud rate and protocol selection (RTU/ASCII)
- SW-2: Modbus slave address (1–63) and factory reset (INIT)
- Default Settings:
- Baud rate: 115.2 kbps
- Parity: None
- Data bits: 8
- Stop bits: 1
- Slave address: 1
Communication Interface:
- Protocol: Modbus RTU/ASCII
- Baud Rates: 1200, 2400, 4800, 9600, 19.2k, 38.4k, 57.6k, 115.2k bps
- Network Distance: Up to 4000 ft (1200 m) without repeater
- Maximum Nodes: 63 modules per RS-485 segment
Software Configuration:
- ioCFG Utility (Windows®):
- Used for module detection, configuration, and monitoring
- Supports parameter upload/download and EEPROM storage
- Provides real-time data visualization and simulation mode
LED Indicators:
- PWR: Power status
- RX/TX: Communication activity
- IO_ACC: Module operation status
- Rt_ON: RS-485 termination resistor status
Factory Reset Procedure:
1. Power off the module.
2. Set DIP switch SW-2, pin 7 (INIT) to ON.
3. Power on the module.
4. Return DIP switch to OFF within 5 seconds to restore defaults.
### 7. Performance & Capabilities
Analog Output Performance:
- Resolution: 12-bit (4096 steps)
- Accuracy: ±0.1% of full scale
- Response Time: 10 ms typical
- Temperature Drift: < ±0.005%/°C
- Load Capability: 0–500 Ω (current mode), 1 kΩ output impedance (voltage mode)
- Output Protection: Short-circuit and overcurrent protection
Communication Performance:
- Protocol Support: Modbus RTU and ASCII
- Supported Function Codes:
- 01: Read Coil Status
- 02: Read Input Status
- 03: Read Holding Registers
- 04: Read Input Registers
- 05: Force Single Coil
- 06: Preset Single Register
- 08: Loopback Command
- 15: Force Multiple Coils
- 16: Preset Multiple Registers
- 17: Report Slave ID
- Maximum Data Length: 48 words per RTU message (24 words per ASCII message)
Reliability & Safety:
- Dual Watchdog System:
- Hardware watchdog resets CPU on fault.
- Communication watchdog ensures safe output state during network failure.
- Fail-Safe Operation:
- User-defined safe output values during communication loss.
- MTBF: High mean time between failures due to industrial-grade components.
Limitations:
- Maximum of two analog output channels per module.
- Not designed for human life-support or safety-critical applications.
### 8. Standards & Compliance
Electrical & EMC Compliance:
- CE Certified
- 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)
Isolation & Protection:
- RS-485 Isolation: 3000 Vrms
- Field-to-Logic Isolation: 3000 Vrms
- Channel-to-Channel Isolation: Yes
- Overvoltage Protection: 70 V DC/Vp-p
Environmental Standards:
- Designed for industrial environments with high EMI/RFI immunity.
- Operating temperature range compliant with industrial-grade specifications.
Communication Standards:
- Modbus RTU/ASCII over RS-485 (EIA/TIA-485 standard)
- Network Topology: Multi-drop, up to 63 nodes without repeater
### 9. Additional Information
Warranty:
- Duration: 2 years from delivery or 1 year after installation (whichever comes first)
- Coverage: Manufacturing defects under normal operation
- Exclusions: Damage due to misuse, improper installation, or operation outside specifications
Service Policy:
- Free repair, testing, and adjustment during warranty period (shipping costs borne by customer).
- Post-warranty repairs available at approximately 25% of product price.
- RMA (Return Material Authorization) required for all returns.
Maintenance:
- Periodic inspection of wiring and terminal connections recommended.
- Keep module clean and free from dust or moisture.
- Avoid exposure to corrosive gases or excessive vibration.
Software & Firmware Updates:
- ioCFG configuration software updates available via Sunix support.
- Firmware updates may be released to enhance performance or compatibility.
Support Resources:
- Website: [www.sunix.com](http://www.sunix.com)
- Technical Forum: SUNIX Tech Forum for ioSCADA users
- Documentation: ioSCADA User’s Manual, Modbus Register Map, and Configuration Guide
### Summary
The SUNIX SM_AO_102i is a robust, high-precision 2-channel analog output module engineered for industrial automation and SCADA systems. With its 12-bit resolution, wide output range, and industrial-grade isolation, it ensures reliable analog signal generation even in electrically noisy environments. The module’s Modbus RTU/ASCII compatibility, hardware and communication watchdogs, and fail-safe mechanisms make it a dependable choice for distributed control architectures. Its DIN-rail mount design, user-friendly configuration, and comprehensive protection features position it as an ideal solution for process control, data acquisition, and remote I/O expansion in demanding industrial applications.
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