AO845A ABB AO845 8-Channel Analog Output Module

ABB AO845/AO845A Analog Output Module: 8-Channel 4-20mA HART Solution

The AO845/AO845A is a high-performance analog output module for single or redundant industrial applications. It offers 8 unipolar 4-20mA channels with HART pass-through and groupwise isolation, ensuring reliable control in automation systems.

Key Features

• 8 channels of 4-20mA current output for versatile industrial control.
• Supports redundant configurations to maximize system uptime.
• Groupwise isolation from ground enhances noise immunity.
• HART pass-through enables communication with smart field devices.
• Short-circuit protection safeguards outputs against wiring errors.

Technical Specifications

• Model: AO845/AO845A (Article Number: 3BSE045584R1)
• Resolution: 12 bits for precise signal conversion.
• Output Load: Max 750Ω to support various field devices.
• Update Cycle Time: 10ms for real-time response.
• Temperature Range: 0 to 55°C (32 to 131°F) operating environment.
• Power Consumption: 218mA (+24V external), 125mA max (+5V ModuleBus).

Diagnostics & Safety

• External Channel Error: Triggers for low process power or open circuit (set value >1mA).
• Internal Channel Error: Indicates output circuit failure to maintain set current.
• Module Error: Covers transistor faults, short circuits, checksum errors, and watchdog timeouts.
• Front LEDs: F(ault), R(un), W(arning), O(SP) indicators for quick status checks.

Installation & Compatibility

• Mechanical Design: S800 series with 45mm width, 102mm depth, 119mm height.
• Mounting: Compatible with MTUs: TU810V1, TU812, TU814, TU830, TU833, TU842, TU843, TU852.
• Cable Length: Supports up to 600 meters (656 yards) for flexible wiring.

Package Contents

• AO845/AO845A analog output module
• Mounting hardware and user manual
• Quick-start guide for easy installation

FAQ

• Q: Does the module support HART communication?
• A: Yes, it includes HART pass-through for HART-enabled devices.
• Q: What is the maximum output load?
• A: The module handles up to 750Ω, suitable for most industrial actuators.
• Q: Is redundancy available?
• A: Yes, the AO845/AO845A works in redundant pairs controlled by the ModuleBus master.

Shipping & Delivery

• Carriers: FedEx, UPS, DHL for global shipping.
• Packaging: Secure industrial packaging to protect during transit.

The AO845/AO845A combines robust performance, flexible configuration, and advanced diagnostics, making it ideal for modern industrial automation. Its compatibility with S800 series MTUs ensures easy integration into existing systems.