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- High Resolution: 16-bit digital-to-analog conversion for precise output control.
- Single Analog Output Channel: Supports one configurable output channel for voltage or current signals.
- Output Range Flexibility: Selectable output ranges of 0–10 VDC, 0–20 mA, or 4–20 mA.
- RS-485 Communication Interface: Fully compatible with standard RS-485 networks using ASCII command protocol.
- Wide Operating Temperature Range: Designed for industrial environments with extended temperature tolerance.
- Dual Watchdog Timer (WDT): Ensures system reliability by monitoring both host and module operation.
- Safe and Power-On Values: Configurable safe-state and power-on output values for fail-safe operation.
- Internal or External Power Drive: Internal power supports up to 500 Ω load; external 24 V supply supports up to 1050 Ω load.
- Programmable Slew Rate Control: Adjustable output transition rate from immediate change to gradual ramping (0.0625 V/s to 512 V/s or equivalent current rates).
- Current Readback Function: Integrated A/D converter for monitoring actual output current, enabling fault detection.
- Low Power Consumption: Typical consumption of 2 W.
- Compact Modular Design: Fits within the EX9000 series modular I/O system for distributed automation.
- Single Analog Output Channel: Supports one configurable output channel for voltage or current signals.
- Output Range Flexibility: Selectable output ranges of 0–10 VDC, 0–20 mA, or 4–20 mA.
- RS-485 Communication Interface: Fully compatible with standard RS-485 networks using ASCII command protocol.
- Wide Operating Temperature Range: Designed for industrial environments with extended temperature tolerance.
- Dual Watchdog Timer (WDT): Ensures system reliability by monitoring both host and module operation.
- Safe and Power-On Values: Configurable safe-state and power-on output values for fail-safe operation.
- Internal or External Power Drive: Internal power supports up to 500 Ω load; external 24 V supply supports up to 1050 Ω load.
- Programmable Slew Rate Control: Adjustable output transition rate from immediate change to gradual ramping (0.0625 V/s to 512 V/s or equivalent current rates).
- Current Readback Function: Integrated A/D converter for monitoring actual output current, enabling fault detection.
- Low Power Consumption: Typical consumption of 2 W.
- Compact Modular Design: Fits within the EX9000 series modular I/O system for distributed automation.
1. Product Overview
Product Name: EX9021P
Model: EX9021P
Series: EX9000 AIO Series (Analog Input/Output Modules)
Article Number: EX9021P
Manufacturer: EX Industrial Automation (part of the EX9000 modular I/O family)
The EX9021P is a high-precision, single-channel analog output module designed for integration into RS-485-based industrial control networks. It provides a 16-bit digital-to-analog conversion capability, enabling precise voltage or current output control for process automation, instrumentation, and remote I/O applications. As part of the EX9000 AIO series, the EX9021P shares a common communication protocol, configuration structure, and calibration methodology with related models such as the EX9021, EX9022, and EX9024, ensuring interoperability and scalability within distributed control systems.
2. Key Features
- High Resolution: 16-bit digital-to-analog conversion for precise output control.
- Single Analog Output Channel: Supports one configurable output channel for voltage or current signals.
- Output Range Flexibility: Selectable output ranges of 0–10 VDC, 0–20 mA, or 4–20 mA.
- RS-485 Communication Interface: Fully compatible with standard RS-485 networks using ASCII command protocol.
- Wide Operating Temperature Range: Designed for industrial environments with extended temperature tolerance.
- Dual Watchdog Timer (WDT): Ensures system reliability by monitoring both host and module operation.
- Safe and Power-On Values: Configurable safe-state and power-on output values for fail-safe operation.
- Internal or External Power Drive: Internal power supports up to 500 Ω load; external 24 V supply supports up to 1050 Ω load.
- Programmable Slew Rate Control: Adjustable output transition rate from immediate change to gradual ramping (0.0625 V/s to 512 V/s or equivalent current rates).
- Current Readback Function: Integrated A/D converter for monitoring actual output current, enabling fault detection.
- Low Power Consumption: Typical consumption of 2 W.
- Compact Modular Design: Fits within the EX9000 series modular I/O system for distributed automation.
3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Resolution | 16-bit |
| Analog Output Channels | 1 |
| Output Voltage Range | 0 – 10 VDC |
| Output Current Range | 0 – 20 mA or 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 | RS-485 (ASCII protocol) |
| 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 (0.0625 V/s to 512 V/s or 0.125 mA/s to 1024 mA/s) |
| Safe Value / Power-On Value | User-configurable |
| Watchdog Timer | Dual WDT (module and host) |
| Power Supply Options | Internal or external 24 VDC |
| Operating Temperature Range | Extended industrial range (exact limits per manufacturer specification) |
| Module Type | Analog Output (A/O) |
| Series Compatibility | EX9021, EX9022, EX9024 (shared command set and configuration) |
4. Functionality
The EX9021P functions as a digital-to-analog converter module that translates digital commands received via RS-485 into precise analog output signals. It supports both voltage and current output modes, selectable through configuration commands or jumper settings. The module can be powered internally or externally, depending on the load requirements.
Operation Principle:
- The host controller communicates with the EX9021P using ASCII-based commands over RS-485.
- The module interprets commands such as `#AA(data)` to set output values or `$AAx` to perform calibration and configuration.
- The analog output is generated by a 16-bit DAC, providing fine resolution and stability.
- Slew rate control allows gradual output transitions to prevent abrupt signal changes in sensitive systems.
- The built-in A/D converter enables current readback, allowing verification of actual output and detection of wiring or load issues.
Use Cases and Applications:
- Industrial process control (e.g., valve positioning, actuator control)
- Analog signal generation for test and measurement systems
- Remote I/O expansion in SCADA and DCS networks
- Signal retransmission and analog scaling
- Laboratory automation and instrumentation
Compatibility:
- Fully compatible with other EX9000 AIO modules (EX9021, EX9022, EX9024)
- Integrates with RS-485-based control systems and Modbus-compatible devices (via ASCII protocol)
- Works with standard 24 VDC industrial power supplies
5. Components & Accessories
Included Components:
- EX9021P module unit
- Terminal block connectors for signal and power wiring
- Factory default configuration (Address 01, 0–10 V output, 9600 bps)
Optional Accessories:
- External 24 VDC power supply for high-load applications
- RS-485 communication cables and converters
- DIN-rail mounting hardware (if not integrated)
- Calibration resistors (250 Ω, 0.01%) for current output calibration
- Multimeter for voltage calibration verification
Connectors and Interfaces:
- RS-485 communication terminals (A/B differential pair)
- Analog output terminals (+Vout / –Vout or +Iout / –Iout)
- Power input terminals (V+ / GND)
- Jumper pins (JP1/JP2) for internal/external power selection
6. Installation & Setup
Requirements:
- 24 VDC power supply (internal or external)
- RS-485 network connection with proper termination
- Host controller or PC with RS-485 interface
Mounting Options:
- DIN-rail or panel mounting (depending on system configuration)
- Ensure adequate ventilation and protection from electrical noise
Configuration Steps:
1. Address and Baud Rate Setup:
Default address is 01; baud rate is 9600 bps. Modify using `%AANNTTCCFF` command if needed.
2. Output Type Selection:
Configure output range (0–10 V, 0–20 mA, or 4–20 mA) via configuration command or jumper.
3. Power Source Selection:
- Internal power (default): drives up to 500 Ω load.
- External 24 V power: drives up to 1050 Ω load.
4. Calibration:
Perform voltage or current calibration using `$AA0`, `$AA1`, `$AA7`, and `$AA3VV` commands.
Use precision resistors and multimeters as specified.
5. Safe and Power-On Values:
Set using `~AA5` (safe value) and `$AA4` (power-on value) commands.
6. Verification:
Use `$AA8` or `$AA6` commands to read back current or last output values.
7. Performance & Capabilities
Speed and Response:
- Analog output updates at approximately 100 conversions per second.
- Slew rate control allows smooth transitions, preventing overshoot or signal spikes.
Capacity and Load Handling:
- Drives up to 500 Ω load with internal power or 1050 Ω with external 24 V supply.
- Output current limited to 10 mA for voltage mode.
Accuracy and Stability:
- 16-bit resolution ensures fine granularity and low quantization error.
- Warm-up period (~30 minutes) recommended before calibration for optimal accuracy.
Efficiency:
- Low power consumption (2 W typical) suitable for distributed installations.
Limitations:
- Single output channel (for multi-channel applications, use EX9022 or EX9024).
- External calibration required for highest precision.
- RS-485 ASCII protocol only (no native Modbus RTU).
8. Standards & Compliance
Certifications and Compliance:
- Designed for industrial automation environments.
- Conforms to RS-485 communication standards.
- Meets general EMC and safety requirements for industrial control equipment (manufacturer-specific compliance details apply).
- Dual watchdog timer ensures compliance with reliability and safety standards for unattended operation.
Industry Standards:
- RS-485 serial communication (EIA/TIA-485)
- 24 VDC industrial power standard
- Analog signal standards (0–10 V, 4–20 mA)
9. Additional Information
Warranty:
Standard manufacturer warranty (typically 1 year, depending on distributor policy).
Technical Support:
Comprehensive documentation, including the EX9021/22/24 User Manual Rev. A.2, provides detailed command references, calibration procedures, and configuration examples. Technical support is available through authorized distributors and manufacturer service channels.
Maintenance:
- Periodic calibration recommended for long-term accuracy.
- Inspect wiring and terminal connections regularly.
- Verify output accuracy using the current readback function.
Firmware and Updates:
- Firmware version can be read using `$AAF` command (e.g., returns `R1.4`).
- Module name and identification can be customized using `$AAM` and `~AAO(Data)` commands.
Reliability Features:
- Dual watchdog timers (module and host) prevent system lock-up.
- Safe and power-on values ensure controlled behavior during communication loss or power cycling.
- EEPROM storage retains configuration and calibration data.
Summary of Command Categories:
- Analog Output Commands: `#AA(data)`, `#AAN(data)`
- Calibration Commands: `$AA0`, `$AA1`, `$AA7`, `$AA3VV`
- Configuration Commands: `%AANNTTCCFF`, `$AA2`, `$AAF`, `$AAM`
- Safety and Status Commands: `~AA4`, `~AA5`, `~AA3EVV`, `~AA0`
- Readback Commands: `$AA6`, `$AA8`, `$AA9N`, `$AA9NTS`
Comprehensive Summary
The EX9021P 16-bit Analog Output RS-485 Module is a precision, single-channel analog output device engineered for industrial automation and process control systems. It provides flexible output modes (voltage or current), robust RS-485 communication, and advanced features such as programmable slew rate, dual watchdog timers, and current readback diagnostics. Its 16-bit resolution ensures high accuracy, while configurable safe and power-on values enhance operational safety. The module’s compatibility with the EX9000 AIO series allows seamless integration into distributed control architectures, making it ideal for applications requiring reliable, high-resolution analog signal generation in harsh industrial environments.
Product Name: EX9021P
Model: EX9021P
Series: EX9000 AIO Series (Analog Input/Output Modules)
Article Number: EX9021P
Manufacturer: EX Industrial Automation (part of the EX9000 modular I/O family)
The EX9021P is a high-precision, single-channel analog output module designed for integration into RS-485-based industrial control networks. It provides a 16-bit digital-to-analog conversion capability, enabling precise voltage or current output control for process automation, instrumentation, and remote I/O applications. As part of the EX9000 AIO series, the EX9021P shares a common communication protocol, configuration structure, and calibration methodology with related models such as the EX9021, EX9022, and EX9024, ensuring interoperability and scalability within distributed control systems.
2. Key Features
- High Resolution: 16-bit digital-to-analog conversion for precise output control.
- Single Analog Output Channel: Supports one configurable output channel for voltage or current signals.
- Output Range Flexibility: Selectable output ranges of 0–10 VDC, 0–20 mA, or 4–20 mA.
- RS-485 Communication Interface: Fully compatible with standard RS-485 networks using ASCII command protocol.
- Wide Operating Temperature Range: Designed for industrial environments with extended temperature tolerance.
- Dual Watchdog Timer (WDT): Ensures system reliability by monitoring both host and module operation.
- Safe and Power-On Values: Configurable safe-state and power-on output values for fail-safe operation.
- Internal or External Power Drive: Internal power supports up to 500 Ω load; external 24 V supply supports up to 1050 Ω load.
- Programmable Slew Rate Control: Adjustable output transition rate from immediate change to gradual ramping (0.0625 V/s to 512 V/s or equivalent current rates).
- Current Readback Function: Integrated A/D converter for monitoring actual output current, enabling fault detection.
- Low Power Consumption: Typical consumption of 2 W.
- Compact Modular Design: Fits within the EX9000 series modular I/O system for distributed automation.
3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Resolution | 16-bit |
| Analog Output Channels | 1 |
| Output Voltage Range | 0 – 10 VDC |
| Output Current Range | 0 – 20 mA or 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 | RS-485 (ASCII protocol) |
| 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 (0.0625 V/s to 512 V/s or 0.125 mA/s to 1024 mA/s) |
| Safe Value / Power-On Value | User-configurable |
| Watchdog Timer | Dual WDT (module and host) |
| Power Supply Options | Internal or external 24 VDC |
| Operating Temperature Range | Extended industrial range (exact limits per manufacturer specification) |
| Module Type | Analog Output (A/O) |
| Series Compatibility | EX9021, EX9022, EX9024 (shared command set and configuration) |
4. Functionality
The EX9021P functions as a digital-to-analog converter module that translates digital commands received via RS-485 into precise analog output signals. It supports both voltage and current output modes, selectable through configuration commands or jumper settings. The module can be powered internally or externally, depending on the load requirements.
Operation Principle:
- The host controller communicates with the EX9021P using ASCII-based commands over RS-485.
- The module interprets commands such as `#AA(data)` to set output values or `$AAx` to perform calibration and configuration.
- The analog output is generated by a 16-bit DAC, providing fine resolution and stability.
- Slew rate control allows gradual output transitions to prevent abrupt signal changes in sensitive systems.
- The built-in A/D converter enables current readback, allowing verification of actual output and detection of wiring or load issues.
Use Cases and Applications:
- Industrial process control (e.g., valve positioning, actuator control)
- Analog signal generation for test and measurement systems
- Remote I/O expansion in SCADA and DCS networks
- Signal retransmission and analog scaling
- Laboratory automation and instrumentation
Compatibility:
- Fully compatible with other EX9000 AIO modules (EX9021, EX9022, EX9024)
- Integrates with RS-485-based control systems and Modbus-compatible devices (via ASCII protocol)
- Works with standard 24 VDC industrial power supplies
5. Components & Accessories
Included Components:
- EX9021P module unit
- Terminal block connectors for signal and power wiring
- Factory default configuration (Address 01, 0–10 V output, 9600 bps)
Optional Accessories:
- External 24 VDC power supply for high-load applications
- RS-485 communication cables and converters
- DIN-rail mounting hardware (if not integrated)
- Calibration resistors (250 Ω, 0.01%) for current output calibration
- Multimeter for voltage calibration verification
Connectors and Interfaces:
- RS-485 communication terminals (A/B differential pair)
- Analog output terminals (+Vout / –Vout or +Iout / –Iout)
- Power input terminals (V+ / GND)
- Jumper pins (JP1/JP2) for internal/external power selection
6. Installation & Setup
Requirements:
- 24 VDC power supply (internal or external)
- RS-485 network connection with proper termination
- Host controller or PC with RS-485 interface
Mounting Options:
- DIN-rail or panel mounting (depending on system configuration)
- Ensure adequate ventilation and protection from electrical noise
Configuration Steps:
1. Address and Baud Rate Setup:
Default address is 01; baud rate is 9600 bps. Modify using `%AANNTTCCFF` command if needed.
2. Output Type Selection:
Configure output range (0–10 V, 0–20 mA, or 4–20 mA) via configuration command or jumper.
3. Power Source Selection:
- Internal power (default): drives up to 500 Ω load.
- External 24 V power: drives up to 1050 Ω load.
4. Calibration:
Perform voltage or current calibration using `$AA0`, `$AA1`, `$AA7`, and `$AA3VV` commands.
Use precision resistors and multimeters as specified.
5. Safe and Power-On Values:
Set using `~AA5` (safe value) and `$AA4` (power-on value) commands.
6. Verification:
Use `$AA8` or `$AA6` commands to read back current or last output values.
7. Performance & Capabilities
Speed and Response:
- Analog output updates at approximately 100 conversions per second.
- Slew rate control allows smooth transitions, preventing overshoot or signal spikes.
Capacity and Load Handling:
- Drives up to 500 Ω load with internal power or 1050 Ω with external 24 V supply.
- Output current limited to 10 mA for voltage mode.
Accuracy and Stability:
- 16-bit resolution ensures fine granularity and low quantization error.
- Warm-up period (~30 minutes) recommended before calibration for optimal accuracy.
Efficiency:
- Low power consumption (2 W typical) suitable for distributed installations.
Limitations:
- Single output channel (for multi-channel applications, use EX9022 or EX9024).
- External calibration required for highest precision.
- RS-485 ASCII protocol only (no native Modbus RTU).
8. Standards & Compliance
Certifications and Compliance:
- Designed for industrial automation environments.
- Conforms to RS-485 communication standards.
- Meets general EMC and safety requirements for industrial control equipment (manufacturer-specific compliance details apply).
- Dual watchdog timer ensures compliance with reliability and safety standards for unattended operation.
Industry Standards:
- RS-485 serial communication (EIA/TIA-485)
- 24 VDC industrial power standard
- Analog signal standards (0–10 V, 4–20 mA)
9. Additional Information
Warranty:
Standard manufacturer warranty (typically 1 year, depending on distributor policy).
Technical Support:
Comprehensive documentation, including the EX9021/22/24 User Manual Rev. A.2, provides detailed command references, calibration procedures, and configuration examples. Technical support is available through authorized distributors and manufacturer service channels.
Maintenance:
- Periodic calibration recommended for long-term accuracy.
- Inspect wiring and terminal connections regularly.
- Verify output accuracy using the current readback function.
Firmware and Updates:
- Firmware version can be read using `$AAF` command (e.g., returns `R1.4`).
- Module name and identification can be customized using `$AAM` and `~AAO(Data)` commands.
Reliability Features:
- Dual watchdog timers (module and host) prevent system lock-up.
- Safe and power-on values ensure controlled behavior during communication loss or power cycling.
- EEPROM storage retains configuration and calibration data.
Summary of Command Categories:
- Analog Output Commands: `#AA(data)`, `#AAN(data)`
- Calibration Commands: `$AA0`, `$AA1`, `$AA7`, `$AA3VV`
- Configuration Commands: `%AANNTTCCFF`, `$AA2`, `$AAF`, `$AAM`
- Safety and Status Commands: `~AA4`, `~AA5`, `~AA3EVV`, `~AA0`
- Readback Commands: `$AA6`, `$AA8`, `$AA9N`, `$AA9NTS`
Comprehensive Summary
The EX9021P 16-bit Analog Output RS-485 Module is a precision, single-channel analog output device engineered for industrial automation and process control systems. It provides flexible output modes (voltage or current), robust RS-485 communication, and advanced features such as programmable slew rate, dual watchdog timers, and current readback diagnostics. Its 16-bit resolution ensures high accuracy, while configurable safe and power-on values enhance operational safety. The module’s compatibility with the EX9000 AIO series allows seamless integration into distributed control architectures, making it ideal for applications requiring reliable, high-resolution analog signal generation in harsh industrial environments.
No accessories available.