Product Description: ECPA81-2 Analog Output Module

1. General Description

2. Key Features

• 8-channel Analog Output: High-density configuration for efficient control of multiple analog devices.

• Current Loop Output: Standard 0 to 20 mA signal, compatible with most industrial analog actuators.

• High Resolution: 11-bit digital-to-analog conversion for precise control signal output.

• Galvanic Isolation: Full electrical isolation between output channels and the system backplane, enhancing noise immunity and protecting the control system.

• Individual Channel Status: Equipped with LED indicators for real-time monitoring of each channel's operational status.

• Wide Load Driving Capacity: Capable of driving loads up to 560 Ω, ensuring compatibility with various field devices.

• Comprehensive Protection: Built-in overcurrent, short-circuit, and polarity reversal protection for each channel.

• Compact Design: Single-slot module for MULTI / MIDI racks, optimizing cabinet space utilization.

• Plug-and-Play: Directly compatible with B&R MULTI / MIDI CPU and backplane systems for easy installation and replacement.

• Industrial Robustness: Wide operating temperature range and compliance with CE standards for EMC and safety.

3. Technical Specifications

Analog Output Parameters

• Number of Output Channels: 8

• Output Signal Type: 0 to 20 mA DC current loop

• Resolution: 11 bits

• Accuracy (at 20°C): ±0.1% of full scale

• Gain Drift: ±0.12% per °C

• Offset Drift (0 to 60°C): ±0.05% to ±0.08% per °C

• Maximum Load per Channel: 560 Ω

• Total Load Current (All Channels): -80 mA to +160 mA

• Settling Time: Typically ≤ 5 ms

• Isolation Voltage: 500 VDC (Field-side to System Backplane)

Electrical Data

• Power Supply: Backplane-powered (MULTI / MIDI system)

• Power Consumption:

  • At +8 V: Approx. 0.5 W

  • At +15 V: Approx. 1.7 W

  • At -30 V: Approx. 3.0 W

Mechanical Data

• Form Factor: Single slot module for MULTI / MIDI rack

• Mounting: Plug-in installation onto system backplane

• Connection: Front-facing screw terminal block

• Wire Gauge: 0.5 ~ 1.5 mm²

• Dimensions (L x W x H): Approx. 229 mm x 152 mm x 25 mm

• Weight: Approx. 0.2 kg ~ 0.4 kg

• Protection Degree: IP20 (front panel)

Environmental Conditions

• Operating Temperature: -25 °C ~ +60 °C

• Storage Temperature: -40 °C ~ +85 °C

• Relative Humidity: 5% ~ 95%, non-condensing

• Vibration Resistance: Compliant with IEC 60068-2-6

• Shock Resistance: Compliant with IEC 60068-2-27

• Pollution Degree: 2

• Overvoltage Category: II

• Certifications: CE

4. Typical Applications

• Process Control Systems: Driving proportional control valves, I/P converters, and flow controllers.

• Factory Automation: Controlling positioners, actuators, and variable-speed drives.

• Test & Measurement: Providing control signals for data recorders and environmental chambers.

• Material Handling: Controlling tensioners, load cells, and positioning cylinders.

• Legacy System Maintenance: Direct replacement for aging PA81 modules in B&R MULTI/MIDI systems.

• Power & Energy: Analog control for turbine governors, generator excitation systems, and auxiliary equipment.

5. Installation & Integration

• Installation: Directly plug into an available slot on a B&R MULTI or MIDI backplane. The module is mechanically keyed to prevent incorrect insertion.

• Wiring: Connect field devices to the front screw terminals. Each channel is clearly labeled for identification.

• Status Monitoring: Each channel features an LED indicator to signal active output status for quick diagnostics.

• Configuration: Recognized automatically by B&R system software. Channel parameters and output ranges are configured via standard PLC programming tools.

• Maintenance: Supports hot-swapping in compatible system setups, allowing for replacement without full system shutdown.

6. Ordering Information

• Part Number: ECPA81-2

• Description: 8-channel, 0-20 mA, 11-bit Analog Output Module

• Alternative Part Number: PA81

• Compatible Systems: B&R MULTI / MIDI Series Control Systems

• Warranty: Standard manufacturer's warranty (typically 12 months)