
Product Description
Emerson EC20-4DA 4-Channel Analog Output Module - Precision Control for DeltaV EC20 PLC Systems
The Emerson EC20-4DA 4-Channel Analog Output Expansion Module extends the control capabilities of DeltaV EC20 Series Programmable Logic Controllers with four independent analog output channels. This compact module delivers precise voltage and current signals for controlling actuators, valves, variable frequency drives, and process instrumentation across oil & gas, chemical, pharmaceutical, power generation, and manufacturing applications.
Core Technical Specifications
- Model Number: EC20-4DA
- Series: DeltaV EC20 PLC System
- Output Channels: 4 independent analog outputs
- Output Types: -10V to +10V, 0-20mA, 4-20mA (configurable per channel)
- Resolution: 12-bit (4096 discrete levels)
- Accuracy: ±1% of full scale
- Conversion Time: 10ms per channel (40ms for all 4 channels)
- Power Supply: 24VDC supplied by EC20 main module
- Power Consumption: Approximately 2.5W
- Operating Temperature: -5°C to +55°C (23°F to 131°F)
Global Safety & EMC Certifications
Certified for deployment in industrial automation environments worldwide:
- CE Marking: European conformity for electrical safety and EMC compliance
- RoHS Compliant: Restriction of Hazardous Substances directive compliance
- Protection Rating: IP20 for control cabinet installations
- Environmental: ISA-S71.04-1985 Class G3 airborne contaminants protection
Industrial Process Control Applications
Valve Positioning & Flow Control: Drive pneumatic control valve positioners and I/P (current-to-pressure) converters for precise flow regulation in chemical reactors, distillation columns, and pipeline metering stations. The 4-20mA output provides standard industry signal for valve actuators, while the 12-bit resolution enables smooth, stepless positioning across the full valve travel range.
Variable Frequency Drive Control: Control motor speeds for pumps, fans, compressors, and conveyors through VFD analog input terminals. The ±10V output option accommodates VFDs requiring bipolar voltage signals for bidirectional motor control. The 10ms conversion time per channel ensures responsive speed regulation for dynamic process conditions.
Temperature & Pressure Setpoint Control: Provide analog setpoints to standalone temperature controllers, pressure regulators, and PID controllers in cascade control architectures. The EC20-4DA acts as the supervisory controller, adjusting local loop setpoints based on upstream process conditions, production schedules, or optimization algorithms.
Chart Recorder & Data Logger Interfacing: Drive analog inputs on strip chart recorders, circular chart recorders, and paperless data loggers for regulatory compliance documentation. The 0-20mA output option accommodates legacy recording equipment requiring current loop signals without ground reference requirements.
Analog Indicator & Display Panels: Control analog panel meters, bar graph displays, and process indicators for operator visibility in control rooms and field equipment shelters. The voltage output option (-10V to +10V) provides sufficient signal strength for driving multiple indicators in parallel without signal degradation.
12-Bit Resolution Advantages
Precision control for demanding applications:
- 4096 Discrete Levels: 12-bit D/A conversion provides 4096 unique output values across the full signal range
- Fine Granularity: For 4-20mA output, each step represents approximately 3.9µA, enabling smooth valve positioning without hunting
- Voltage Precision: For ±10V output, each step represents approximately 4.9mV, suitable for high-resolution VFD speed control
- Reduced Oscillation: Fine resolution minimizes control loop oscillation and overshoot in PID applications
- Improved Product Quality: Precise analog control maintains tighter process tolerances for consistent product specifications
System Integration & Configuration
Seamless integration with DeltaV EC20 PLC platform:
Bus Communication: The EC20-4DA connects to the EC20 main module via the internal system bus, eliminating external wiring for data communication. The module automatically appears in the ControlStar programming software I/O configuration tree upon physical installation, simplifying commissioning and reducing configuration errors.
ControlStar Programming: Configure output types (voltage or current), scaling parameters, fault behavior, and diagnostic thresholds through the intuitive ControlStar software interface. Ladder logic, function block diagram (FBD), and structured text (ST) programming languages provide flexible control algorithm implementation.
Hot-Swap Capability: Replace failed modules without powering down the entire PLC system (when properly configured). The EC20 architecture supports online module replacement for critical applications requiring maximum uptime, though field wiring must be disconnected before module removal.
Diagnostic Monitoring: Real-time monitoring of output current/voltage, wire break detection, and overload conditions through ControlStar software. Diagnostic status bits integrate into control logic for automatic fault handling and alarm generation.
Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature | -5°C to +55°C (23°F to 131°F) |
| Storage Temperature | -40°C to +70°C (-40°F to 158°F) |
| Relative Humidity | 5% to 95% non-condensing at 30±2°C |
| Airborne Contaminants | ISA-S71.04-1985 Class G3 protection |
| Protection Rating | IP20 (control cabinet environment) |
| Dimensions | 58mm (L) x 90mm (W) x 82mm (H) |
| Weight | Approximately 240g |
Output Configuration Options
| Output Type | Range | Typical Application |
|---|---|---|
| Voltage | -10V to +10V | VFD speed control, bidirectional actuators |
| Current (0-20mA) | 0 to 20mA | Legacy equipment, chart recorders |
| Current (4-20mA) | 4 to 20mA | Valve positioners, I/P converters, standard industrial |
Why Choose Industrial Control Hub?
Your specialized source for genuine Emerson automation components:
- ✓ 100% authentic OEM products with full manufacturer traceability and warranty
- ✓ Expert PLC technical support from certified automation engineers
- ✓ Extensive inventory of current production and legacy DeltaV EC20 modules
- ✓ Expedited global shipping to US, UK, EU, and Asia-Pacific markets
- ✓ Competitive pricing with volume discounts for project quantities
- ✓ Complete documentation, ControlStar configuration guides, and integration assistance
Complementary DeltaV EC20 Components
| Product Model | Description | Link |
|---|---|---|
| EC20-8AD | Analog Input Module 8-channel for process measurement and monitoring | View Product |
| KC3011X1-BA1 | AO Plus 16-Channel 4-20mA HART Card for DeltaV M-series systems | View Product |
| KC3011X1-BK1 | S-Series 16-Channel Analog Output Module for advanced DeltaV systems | View Product |
Installation & Mounting
- Mounting Type: T-type DIN rail (35mm standard)
- Orientation: Vertical mounting recommended for optimal cooling
- Spacing: Minimum 10mm clearance on sides for heat dissipation
- Wiring: Removable screw terminal blocks for field connections (22-14 AWG)
- Bus Connection: Automatic connection to EC20 main module via backplane
Ordering Information & System Planning
- EC20-4DA: 4-Channel Analog Output Expansion Module (this product)
- Compatible PLCs: EC20-2012BTA, EC20-3232BRA, and other EC20 series main modules
- Programming Software: ControlStar required for configuration and diagnostics
- Maximum Modules: Up to 8 expansion modules per EC20 main module (check specific PLC model)
- Spare Parts Strategy: Maintain spare modules for critical control loops to minimize downtime
Technical Documentation & Support
Complete installation manuals, ControlStar programming guides, wiring diagrams, and commissioning procedures available upon request. Our application engineering team provides PLC system design consultation, I/O configuration assistance, control algorithm development support, and troubleshooting guidance for complex EC20 automation projects.
Maintenance & Service Life
- MTBF: >100,000 hours at 25°C ambient temperature
- Preventive Maintenance: Verify output calibration annually, inspect terminal connections quarterly
- No User-Serviceable Parts: Factory-sealed electronics require no field maintenance
- Expected Service Life: 10-15 years in typical industrial control room environments
- Firmware Updates: Field-upgradable firmware through ControlStar software (when available)
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