AO845 Analog Output 8-Channel Module ABB 3BSE023676R1

Product Overview

The ABB AO845 (Part Number: 3BSE023676R1) serves as an 8-channel analog output module within the high-density S800 I/O platform. This processing component delivers precise 0 to 20 mA or 4 to 20 mA current loops to modulate final control elements, including variable speed drives, current-to-pressure (I/P) transducers, and proportional pneumatic valves. Operating natively with the AC 800M controller and the System 800xA distributed control architecture, this module decodes digital fieldbus values into regulated analog currents. We supply this product as a 100% brand new, authentic factory unit sourced from ABB Sweden to guarantee reliable duty cycles in harsh production plants.

Technical Specifications

Engineering Advantages

• High-Density Channel Layout Conserves Panel Space: Packing 8 fully programmable current loops into a compact 45 mm wide housing optimizes cabinet rail real estate. This dense configuration allows panel builders to reduce the total number of physical I/O slots and shrink overall enclosure dimensions.

• Rapid Signal Response Time Optimizes Control Loops: A 1 ms signal rise time enables near-instantaneous current adjustment. This fast responsiveness ensures highly stable loop control when driving fast-acting proportional valves or high-speed variable frequency drives on automated liquid pipelines.

• Groupwise Electrical Isolation Blocks Common Mode Noise: The module utilizes groupwise circuit isolation to shield sensitive internal Modulebus digital processors from external electrical noise. This design protects the controller against inductive spikes and voltage shifts originating on field ground loops.

• ATEX Zone 2 Compliance for Decentralized Mounting: With official ATEX Zone 2 and IECEx certifications, the module operates safely in volatile processing areas without requiring a purged control enclosure. This allows engineers to install the hardware closer to the actual field equipment, decreasing long field cabling paths.

FAQs

• Is this specific AO845 module a 100% brand new component?

  Yes. We sell this item as a 100% brand new, original factory component. It arrives inside authentic ABB protective packaging with all original factory seals intact.

• Does each individual channel feature independent electrical isolation from the other channels?

  No. The AO845 utilizes groupwise isolation rather than channel-to-channel isolation. The channels share a common ground reference loop, but remain fully isolated from the main internal system electronics.

• Can I wire this module into a redundant pair configuration for high-availability loops?

  No. The AO845 module architecture supports single-module operation only. If your plant process demands dual redundant analog output cards, you must look into alternative S800 models like the AO845A which feature redundancy network connections.

• What installation component do I need to mount this module onto a standard DIN-rail?

  You must select and install a compatible ABB Module Termination Unit (MTU). The MTU secures the physical connection to the S800 Modulebus structure and provides screw terminal blocks for the 8 field circuit lines.