Product Details
Description
The AO845 is a high-reliability current output module that delivers 4–20 mA signals to control valves, positioners, and actuators. It supports bi-directional HART communication for device diagnostics and, with a redundant MTU, ensures fault-tolerant operation. Widely used in oil and gas, petrochemical, and power industries, it provides safe and stable process control.
Specifications
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Manufacturer: ABB
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Country of Origin: Sweden
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Model Number: AO845 (3BSE023676R1)
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Output Channels: 8 channels
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Signal Range: 4 to 20 mA
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D/A Resolution: 12 bits
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HART Support: Bi-directional HART protocol pass-through
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Redundancy: Supports 1:1 redundancy for high availability
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Power Supply: 24 VDC nominal
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Physical Weight: 0.25 kg (0.55 lbs)
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Maximum Load: 750 ohms at 20 mA
Features
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High-Availability Redundancy: Designed for paired operation to provide seamless failover, ensuring the process remains controlled during a module swap or internal fault.
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HART Protocol Capability: Facilitates digital data exchange with smart instruments, allowing for remote asset management and secondary variable monitoring.
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Intelligent Fail-Safe Logic: Features user-configurable safety states to hold the last valid signal or move to a pre-defined safe value during communication loss.
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Comprehensive Self-Diagnostics: Continuously monitors the health of internal digital-to-analog converters and output loop integrity.
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Active Current Supervision: Automatically detects open circuits and field wiring faults, reporting errors immediately to the central controller.
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Hot-Swap Support: Allows for live replacement of a faulty module without requiring a system shutdown, significantly reducing maintenance downtime.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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Evolving SCADA System Architectures in Industrial Automation
A robust Supervisory Control and Data Acquisition (SCADA) system serves as the heartbeat of modern industrial operations. Understanding SCADA system architecture is vital for engineers designing efficient control systems. These architectures have evolved from isolated, monolithic structures to highly interconnected, networked ecosystems. Choosing the right design requires balancing data visibility, processing power, and long-term scalability requirements.
Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
Selecting the optimal control architecture is a foundational decision in industrial automation. Engineers must frequently choose between a Programmable Logic Controller (PLC) and a dedicated Motion Controller. While both systems manage machinery, their underlying design philosophies differ significantly, impacting performance, scalability, and system integration.