ABB AO845/AO845A Analog Output Module

ABB AO845/AO845A Analog Output Module: High-Performance 8-Channel Solution

The ABB AO845/AO845A delivers precise 4-20 mA control signals for critical industrial applications. This advanced module combines high reliability with exceptional performance for demanding automation environments.

Key Features and Benefits

• 8 independent channels with 4-20 mA output signals
• 12-bit resolution ensuring superior signal accuracy
• 50V group-wise isolation from ground for enhanced safety
• Short-circuit protection with current limiting up to 750 Ω load
• HART communication support on all channels
• Redundancy capability with automatic switch-over in under 5 ms
• High reliability with MTBF exceeding 1,200,000 hours

Technical Specifications

• Manufacturer: ABB
• Model: AO845/AO845A 3BSE045584R1
• Output Signal: 4-20 mA with -12.5% to +15% range
• Update Cycle: 10 ms typical
• Response Time: 23 ms (0-90% with filter off)
• Operating Temperature: 0 to +55°C (5 to +55°C for approvals)
• Storage Temperature: -40 to +70°C
• Power Consumption: +5V @125 mA, +24V @218 mA
• Dimensions: 45 mm × 119 mm × 102 mm (111 mm with connector)
• Weight: 0.21 kg

Installation Requirements

• Designed for standard industrial DIN rail mounting
• Ensure proper power supply connections
• Maintain adequate clearance for ventilation
• Follow all electrical safety guidelines during installation

System Integration

• Compatible with ABB control system architectures
• Supports HART-enabled field devices
• Ideal for redundant control system configurations
• Seamless integration with existing automation networks

Certifications and Standards

• Complies with international industry standards
• Meets IEC 61709 reliability specifications
• Designed for industrial environment operation

Package Contents

• One ABB AO845/AO845A analog output module
• Installation and operation documentation
• Manufacturer certification papers

Warranty Information

• Comprehensive 1-year warranty
• Coverage for manufacturing defects and workmanship
• Professional technical support included

Industrial Applications

• Process Control: Precise valve and actuator control
• Manufacturing: Speed and position control systems
• Energy Management: Power output regulation
• Water Treatment: Flow and level control applications

Documentation Download

• Download Complete Product Specifications PDF

Frequently Asked Questions

• What is the maximum load impedance supported?
  Each channel supports up to 750 ohm load resistance.
• Does the module support hot-swapping?
  No, power must be disconnected before module installation or removal.
• What redundancy features are available?
  Automatic switch-over capability in less than 5 milliseconds on fault detection.