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- Single Analog Output Channel: Provides one analog output channel configurable for voltage or current output modes.
- 12-bit Resolution: Ensures fine output granularity and high signal accuracy for industrial control applications.
- Output Range Flexibility: Supports voltage output from 0–10 VDC and current output ranges of 0–20 mA or 4–20 mA.
- RS485 Communication Interface: Fully compatible with standard RS485 networks, enabling multi-drop communication and long-distance data transmission.
- Wide Operating Temperature Range: Designed for reliable operation in extended industrial temperature environments.
- Dual Watchdog Timer (WDT): Provides system reliability by monitoring both host and module operation, ensuring safe fallback states in case of communication failure.
- Selectable Power Source: Internal power (default) supports up to 500 Ω load; external 24 V power option supports up to 1050 Ω load.
- Programmable Slew Rate Control: Allows smooth, controlled output transitions to prevent abrupt signal changes that could affect sensitive equipment.
- Safe and Power-On Values: Configurable safe-state and power-on output values ensure predictable behavior during startup or communication loss.
- Current Readback Function: Enables monitoring of actual output current for diagnostic and verification purposes.
- Low Power Consumption: Typical power consumption of 2 W, suitable for distributed I/O systems.
- Calibration and Configuration Commands: Comprehensive command set for calibration, configuration, and monitoring via RS485 communication.
- 12-bit Resolution: Ensures fine output granularity and high signal accuracy for industrial control applications.
- Output Range Flexibility: Supports voltage output from 0–10 VDC and current output ranges of 0–20 mA or 4–20 mA.
- RS485 Communication Interface: Fully compatible with standard RS485 networks, enabling multi-drop communication and long-distance data transmission.
- Wide Operating Temperature Range: Designed for reliable operation in extended industrial temperature environments.
- Dual Watchdog Timer (WDT): Provides system reliability by monitoring both host and module operation, ensuring safe fallback states in case of communication failure.
- Selectable Power Source: Internal power (default) supports up to 500 Ω load; external 24 V power option supports up to 1050 Ω load.
- Programmable Slew Rate Control: Allows smooth, controlled output transitions to prevent abrupt signal changes that could affect sensitive equipment.
- Safe and Power-On Values: Configurable safe-state and power-on output values ensure predictable behavior during startup or communication loss.
- Current Readback Function: Enables monitoring of actual output current for diagnostic and verification purposes.
- Low Power Consumption: Typical power consumption of 2 W, suitable for distributed I/O systems.
- Calibration and Configuration Commands: Comprehensive command set for calibration, configuration, and monitoring via RS485 communication.
Comprehensive Product Summary – EX9021 1-Channel 12-bit Analog Output RS485 Module
### 1. Product Overview
Product Name: EX9021
Model: EX9021
Series: EX9000 AIO (Analog Input/Output) Series
Article Number: EX9021
Manufacturer: EX Industrial Automation (part of the EX9000 modular I/O family)
The EX9021 is a compact, high-precision analog output module designed for integration into RS485-based industrial control networks. It provides a single 12-bit digital-to-analog (DA) output channel capable of generating voltage or current signals for process control, instrumentation, and automation systems. The module is part of the EX9000 AIO series, which includes models EX9021/21P, EX9022, and EX9024, offering scalable analog output capabilities from one to four channels.
### 2. Key Features
- Single Analog Output Channel: Provides one analog output channel configurable for voltage or current output modes.
- 12-bit Resolution: Ensures fine output granularity and high signal accuracy for industrial control applications.
- Output Range Flexibility: Supports voltage output from 0–10 VDC and current output ranges of 0–20 mA or 4–20 mA.
- RS485 Communication Interface: Fully compatible with standard RS485 networks, enabling multi-drop communication and long-distance data transmission.
- Wide Operating Temperature Range: Designed for reliable operation in extended industrial temperature environments.
- Dual Watchdog Timer (WDT): Provides system reliability by monitoring both host and module operation, ensuring safe fallback states in case of communication failure.
- Selectable Power Source: Internal power (default) supports up to 500 Ω load; external 24 V power option supports up to 1050 Ω load.
- Programmable Slew Rate Control: Allows smooth, controlled output transitions to prevent abrupt signal changes that could affect sensitive equipment.
- Safe and Power-On Values: Configurable safe-state and power-on output values ensure predictable behavior during startup or communication loss.
- Current Readback Function: Enables monitoring of actual output current for diagnostic and verification purposes.
- Low Power Consumption: Typical power consumption of 2 W, suitable for distributed I/O systems.
- Calibration and Configuration Commands: Comprehensive command set for calibration, configuration, and monitoring via RS485 communication.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Model | EX9021 |
| Resolution | 12-bit |
| Analog Output Channels | 1 |
| Output Voltage Range | 0–10 VDC |
| Output Current Range | 0–20 mA, 4–20 mA |
| Maximum Voltage Output Current | 10 mA max |
| Load Resistance (Internal Power) | Up to 500 Ω |
| Load Resistance (External 24 V Power) | Up to 1050 Ω |
| Power Consumption | 2 W |
| Communication Interface | RS485 (Modbus-compatible ASCII command set) |
| Default Address | 01 |
| Default Baud Rate | 9600 bps |
| Supported Baud Rates | 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps |
| Data Format Options | Engineering units, % of FSR, or hexadecimal |
| Slew Rate Control | Programmable from immediate to 512 V/s or 1024 mA/s |
| Safe Value / Power-On Value | User-configurable |
| Watchdog Timer | Dual WDT (host and module) |
| Power Supply Options | Internal or external 24 VDC |
| Operating Temperature Range | Extended industrial range (exact limits depend on system configuration) |
| Dimensions / Weight | Compact DIN-rail mountable module (typical EX9000 form factor) |
| Material | Industrial-grade enclosure suitable for control cabinet installation |
### 4. Functionality
The EX9021 functions as a digital-to-analog converter module within an RS485 network. It receives digital commands from a host controller or PLC and converts them into precise analog voltage or current signals. These signals can drive actuators, control valves, transmitters, or other analog devices in process automation systems.
Operating Modes:
- Voltage Output Mode: 0–10 VDC output for voltage-driven devices.
- Current Output Mode: 0–20 mA or 4–20 mA output for current loop systems.
Use Cases and Applications:
- Industrial process control and automation
- Analog actuator control (valves, motors, dampers)
- Signal generation for test and measurement systems
- Remote analog output in distributed I/O networks
- Integration with SCADA and PLC systems via RS485
Compatibility:
- Compatible with other EX9000 series modules (EX9021P, EX9022, EX9024)
- Communicates using ASCII-based command protocol over RS485
- Integrates with Modbus-compatible systems and custom RS485 networks
### 5. Components & Accessories
Included Components:
- EX9021 analog output module
- Terminal block connectors for wiring
- Factory default configuration (Address 01, 9600 bps, 0–10 V output)
Optional Accessories:
- External 24 VDC power supply (for higher load resistance)
- RS485 communication cables and converters
- DIN-rail mounting hardware
- Calibration resistors (e.g., 250 Ω, 0.01% precision for current calibration)
- Multimeter for voltage calibration
Connectors and Interfaces:
- RS485 communication terminals (A/B differential pair)
- Analog output terminals (+Vout / –Vout or +Iout / –Iout)
- Power input terminals (internal/external selection via jumpers JP1/JP2)
### 6. Installation & Setup
Requirements:
- RS485 network connection with proper termination
- 24 VDC power supply (internal or external)
- Host controller or PC with RS485 interface
Mounting Options:
- DIN-rail mounting within control panels
- Panel or enclosure installation with proper ventilation
Configuration Steps:
1. Set Power Source: Configure jumpers JP1/JP2 for internal (default) or external 24 V power.
2. Connect Wiring: Follow wiring diagrams for voltage or current output mode.
3. Assign Address: Default address is 01; can be changed using `%AANNTTCCFF` command.
4. Set Baud Rate: Default 9600 bps; configurable up to 115200 bps.
5. Select Output Type: Configure output range (0–10 V, 0–20 mA, or 4–20 mA) using type codes (TT = 30, 31, 32).
6. Calibrate Output: Perform calibration using appropriate commands and precision resistors.
7. Verify Communication: Test using RS485 commands to confirm proper operation.
Calibration Notes:
- Warm up the module for 30 minutes before calibration.
- Use precision 250 Ω shunt resistor for current calibration.
- Use a calibrated multimeter for voltage calibration.
- Follow command sequences carefully to avoid miscalibration.
### 7. Performance & Capabilities
Speed and Responsiveness:
- Analog output updates at approximately 100 conversions per second.
- Slew rate control allows gradual signal transitions to prevent overshoot or mechanical stress.
Capacity and Load Handling:
- Drives loads up to 500 Ω (internal power) or 1050 Ω (external 24 V).
- Maximum output current 10 mA for voltage mode.
Efficiency:
- Low power consumption (2 W typical).
- Efficient RS485 communication minimizes network load.
Limitations:
- Single output channel (for multi-channel applications, use EX9022 or EX9024).
- 12-bit resolution may not be sufficient for ultra-high precision applications.
- Requires proper calibration for optimal accuracy.
Reliability Features:
- Dual watchdog timers ensure safe fallback operation.
- Configurable safe and power-on values prevent unpredictable outputs during faults.
- Current readback function detects wiring or load faults.
### 8. Standards & Compliance
Certifications and Compliance:
- Designed for industrial automation environments.
- Complies with RS485 communication standards.
- Meets general EMC and safety requirements for industrial control equipment.
- Supports standard ASCII command protocol for interoperability.
Industry Standards:
- RS485 differential signaling standard (TIA/EIA-485)
- Compatible with Modbus ASCII communication conventions
- Follows industrial I/O module design practices for distributed control systems
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years, depending on distributor policy).
Technical Support:
- Comprehensive user manual (EX9021/22/24 User Manual Rev. A.2)
- Firmware version readable via `$AAF` command (e.g., R1.4)
- Module name and identification retrievable via `$AAM` command
Maintenance:
- Periodic calibration recommended for long-term accuracy.
- Inspect wiring and terminal connections regularly.
- Use current readback function to verify output integrity.
Firmware and Updates:
- Firmware version accessible via RS485 command interface.
- Updates may be available from manufacturer for enhanced functionality or bug fixes.
Safety and Handling:
- Do not calibrate without full understanding of procedures.
- Ensure proper grounding and shielding for RS485 communication lines.
- Avoid exceeding specified load resistance and output current limits.
### Summary
The EX9021 1-Channel 12-bit Analog Output RS485 Module is a robust, flexible, and precise analog output device engineered for industrial automation and process control systems. It provides a single high-resolution analog output channel configurable for voltage or current operation, with programmable slew rate control and comprehensive calibration capabilities. Its RS485 communication interface allows seamless integration into distributed control networks, while dual watchdog timers and configurable safe states ensure operational reliability. With low power consumption, extended temperature tolerance, and versatile configuration options, the EX9021 is an ideal solution for applications requiring dependable analog signal generation in industrial environments.
### 1. Product Overview
Product Name: EX9021
Model: EX9021
Series: EX9000 AIO (Analog Input/Output) Series
Article Number: EX9021
Manufacturer: EX Industrial Automation (part of the EX9000 modular I/O family)
The EX9021 is a compact, high-precision analog output module designed for integration into RS485-based industrial control networks. It provides a single 12-bit digital-to-analog (DA) output channel capable of generating voltage or current signals for process control, instrumentation, and automation systems. The module is part of the EX9000 AIO series, which includes models EX9021/21P, EX9022, and EX9024, offering scalable analog output capabilities from one to four channels.
### 2. Key Features
- Single Analog Output Channel: Provides one analog output channel configurable for voltage or current output modes.
- 12-bit Resolution: Ensures fine output granularity and high signal accuracy for industrial control applications.
- Output Range Flexibility: Supports voltage output from 0–10 VDC and current output ranges of 0–20 mA or 4–20 mA.
- RS485 Communication Interface: Fully compatible with standard RS485 networks, enabling multi-drop communication and long-distance data transmission.
- Wide Operating Temperature Range: Designed for reliable operation in extended industrial temperature environments.
- Dual Watchdog Timer (WDT): Provides system reliability by monitoring both host and module operation, ensuring safe fallback states in case of communication failure.
- Selectable Power Source: Internal power (default) supports up to 500 Ω load; external 24 V power option supports up to 1050 Ω load.
- Programmable Slew Rate Control: Allows smooth, controlled output transitions to prevent abrupt signal changes that could affect sensitive equipment.
- Safe and Power-On Values: Configurable safe-state and power-on output values ensure predictable behavior during startup or communication loss.
- Current Readback Function: Enables monitoring of actual output current for diagnostic and verification purposes.
- Low Power Consumption: Typical power consumption of 2 W, suitable for distributed I/O systems.
- Calibration and Configuration Commands: Comprehensive command set for calibration, configuration, and monitoring via RS485 communication.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Model | EX9021 |
| Resolution | 12-bit |
| Analog Output Channels | 1 |
| Output Voltage Range | 0–10 VDC |
| Output Current Range | 0–20 mA, 4–20 mA |
| Maximum Voltage Output Current | 10 mA max |
| Load Resistance (Internal Power) | Up to 500 Ω |
| Load Resistance (External 24 V Power) | Up to 1050 Ω |
| Power Consumption | 2 W |
| Communication Interface | RS485 (Modbus-compatible ASCII command set) |
| Default Address | 01 |
| Default Baud Rate | 9600 bps |
| Supported Baud Rates | 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps |
| Data Format Options | Engineering units, % of FSR, or hexadecimal |
| Slew Rate Control | Programmable from immediate to 512 V/s or 1024 mA/s |
| Safe Value / Power-On Value | User-configurable |
| Watchdog Timer | Dual WDT (host and module) |
| Power Supply Options | Internal or external 24 VDC |
| Operating Temperature Range | Extended industrial range (exact limits depend on system configuration) |
| Dimensions / Weight | Compact DIN-rail mountable module (typical EX9000 form factor) |
| Material | Industrial-grade enclosure suitable for control cabinet installation |
### 4. Functionality
The EX9021 functions as a digital-to-analog converter module within an RS485 network. It receives digital commands from a host controller or PLC and converts them into precise analog voltage or current signals. These signals can drive actuators, control valves, transmitters, or other analog devices in process automation systems.
Operating Modes:
- Voltage Output Mode: 0–10 VDC output for voltage-driven devices.
- Current Output Mode: 0–20 mA or 4–20 mA output for current loop systems.
Use Cases and Applications:
- Industrial process control and automation
- Analog actuator control (valves, motors, dampers)
- Signal generation for test and measurement systems
- Remote analog output in distributed I/O networks
- Integration with SCADA and PLC systems via RS485
Compatibility:
- Compatible with other EX9000 series modules (EX9021P, EX9022, EX9024)
- Communicates using ASCII-based command protocol over RS485
- Integrates with Modbus-compatible systems and custom RS485 networks
### 5. Components & Accessories
Included Components:
- EX9021 analog output module
- Terminal block connectors for wiring
- Factory default configuration (Address 01, 9600 bps, 0–10 V output)
Optional Accessories:
- External 24 VDC power supply (for higher load resistance)
- RS485 communication cables and converters
- DIN-rail mounting hardware
- Calibration resistors (e.g., 250 Ω, 0.01% precision for current calibration)
- Multimeter for voltage calibration
Connectors and Interfaces:
- RS485 communication terminals (A/B differential pair)
- Analog output terminals (+Vout / –Vout or +Iout / –Iout)
- Power input terminals (internal/external selection via jumpers JP1/JP2)
### 6. Installation & Setup
Requirements:
- RS485 network connection with proper termination
- 24 VDC power supply (internal or external)
- Host controller or PC with RS485 interface
Mounting Options:
- DIN-rail mounting within control panels
- Panel or enclosure installation with proper ventilation
Configuration Steps:
1. Set Power Source: Configure jumpers JP1/JP2 for internal (default) or external 24 V power.
2. Connect Wiring: Follow wiring diagrams for voltage or current output mode.
3. Assign Address: Default address is 01; can be changed using `%AANNTTCCFF` command.
4. Set Baud Rate: Default 9600 bps; configurable up to 115200 bps.
5. Select Output Type: Configure output range (0–10 V, 0–20 mA, or 4–20 mA) using type codes (TT = 30, 31, 32).
6. Calibrate Output: Perform calibration using appropriate commands and precision resistors.
7. Verify Communication: Test using RS485 commands to confirm proper operation.
Calibration Notes:
- Warm up the module for 30 minutes before calibration.
- Use precision 250 Ω shunt resistor for current calibration.
- Use a calibrated multimeter for voltage calibration.
- Follow command sequences carefully to avoid miscalibration.
### 7. Performance & Capabilities
Speed and Responsiveness:
- Analog output updates at approximately 100 conversions per second.
- Slew rate control allows gradual signal transitions to prevent overshoot or mechanical stress.
Capacity and Load Handling:
- Drives loads up to 500 Ω (internal power) or 1050 Ω (external 24 V).
- Maximum output current 10 mA for voltage mode.
Efficiency:
- Low power consumption (2 W typical).
- Efficient RS485 communication minimizes network load.
Limitations:
- Single output channel (for multi-channel applications, use EX9022 or EX9024).
- 12-bit resolution may not be sufficient for ultra-high precision applications.
- Requires proper calibration for optimal accuracy.
Reliability Features:
- Dual watchdog timers ensure safe fallback operation.
- Configurable safe and power-on values prevent unpredictable outputs during faults.
- Current readback function detects wiring or load faults.
### 8. Standards & Compliance
Certifications and Compliance:
- Designed for industrial automation environments.
- Complies with RS485 communication standards.
- Meets general EMC and safety requirements for industrial control equipment.
- Supports standard ASCII command protocol for interoperability.
Industry Standards:
- RS485 differential signaling standard (TIA/EIA-485)
- Compatible with Modbus ASCII communication conventions
- Follows industrial I/O module design practices for distributed control systems
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years, depending on distributor policy).
Technical Support:
- Comprehensive user manual (EX9021/22/24 User Manual Rev. A.2)
- Firmware version readable via `$AAF` command (e.g., R1.4)
- Module name and identification retrievable via `$AAM` command
Maintenance:
- Periodic calibration recommended for long-term accuracy.
- Inspect wiring and terminal connections regularly.
- Use current readback function to verify output integrity.
Firmware and Updates:
- Firmware version accessible via RS485 command interface.
- Updates may be available from manufacturer for enhanced functionality or bug fixes.
Safety and Handling:
- Do not calibrate without full understanding of procedures.
- Ensure proper grounding and shielding for RS485 communication lines.
- Avoid exceeding specified load resistance and output current limits.
### Summary
The EX9021 1-Channel 12-bit Analog Output RS485 Module is a robust, flexible, and precise analog output device engineered for industrial automation and process control systems. It provides a single high-resolution analog output channel configurable for voltage or current operation, with programmable slew rate control and comprehensive calibration capabilities. Its RS485 communication interface allows seamless integration into distributed control networks, while dual watchdog timers and configurable safe states ensure operational reliability. With low power consumption, extended temperature tolerance, and versatile configuration options, the EX9021 is an ideal solution for applications requiring dependable analog signal generation in industrial environments.
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