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
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.
Mastering Modern Industrial Joystick Controls in Heavy Automation
Industrial joysticks play a pivotal role in human-machine interaction across heavy material handling and mobile hydraulics. These tactile controllers translate complex operator movements into precise electrical signals for PLCs, motion controllers, and DCS networks. Consequently, selecting and installing the right joystick architecture ensures operator safety, reduces fatigue, and optimizes equipment performance.