Overview

The ABB AO845 Analog Output Module is a high‑performance I/O unit designed for the S800 I/O system and ABB’s AC 800M controllers. It provides 8 galvanically isolated analog output channels, delivering precise current signals for actuators, control valves, and other field devices. Moreover, the AO845 ensures stable and accurate signal transmission with configurable ranges, making it suitable for demanding process industries. In addition, its compact DIN‑rail design and hot‑swap capability simplify installation and maintenance, reducing downtime in mission‑critical operations. Therefore, engineers rely on the AO845 for consistent performance and seamless integration into distributed control systems.

Technical Data

Typical Applications

• Process industries: Driving actuators, control valves, and dosing systems with precise current signals.

• Power generation: Regulating turbine and boiler systems through accurate analog outputs.

• Chemical and pharmaceutical plants: Ensuring reliable dosing, mixing, and flow control.

• Water treatment facilities: Controlling pumps, mixers, and monitoring equipment.

• Manufacturing automation: Providing analog signals for servo controllers and proportional devices.

For instance, engineers often deploy the AO845 in distributed control systems where high accuracy and galvanic isolation are essential. Moreover, its hot‑swap capability minimizes downtime, while diagnostic features simplify troubleshooting.

FAQ

Q1: How many channels does the AO845 provide?
A1: It offers 8 galvanically isolated analog output channels.

Q2: What signal ranges are supported?
A2: The module supports 0–20 mA and 4–20 mA ranges, configurable per channel.

Q3: Is the AO845 hot‑swappable?
A3: Yes, it can be replaced without shutting down the system, reducing downtime.

Q4: What industries typically use the AO845?
A4: It is widely applied in power generation, chemical processing, water treatment, and manufacturing automation.

Q5: Does the AO845 provide diagnostics?
A5: Yes, it includes channel‑level supervision and LED indicators for real‑time monitoring.