ABB AO810 Analog Output Module – 8-Channel 0-20 mA for S800 I/O

Product Overview

As industrial processes evolve toward greater precision and reliability, the demand for robust analog output modules has never been higher. The ABB AO810 Analog Output Module meets this need with eight unipolar channels that deliver 0-20 mA or 4-20 mA signals. Designed for the S800 I/O family, this module provides accurate control signals to actuators, valves, and drives while integrating advanced diagnostic capabilities. Whether you are upgrading an existing system or building a new installation, the AO810 ensures dependable performance in demanding environments.

Technical Specifications

The AO810 offers 14-bit resolution for fine control of output signals. Each channel supports a load range of ≤ 500 Ω when supply is connected to L1+ only, or 250-850 Ω with supply connected to L2+ only. The module achieves a typical error of just 0.1% at 0-500 ohms for current outputs, with a temperature drift of typ. 30 ppm/°C and max 60 ppm/°C. Rise time is 0.35 ms at 500 Ω load, and the update cycle time is ≤ 2 ms. Power dissipation is 2.3 W, with current consumption of max 70 mA on the +5 V Modulebus and 245 mA on the +24 V external supply. The module is groupwise isolated from ground and includes under/over range capability of -/+15%.

Industry Applications

In chemical processing plants, the AO810 provides precise 4-20 mA signals to control valve positioners, ensuring accurate flow regulation. For water treatment facilities, its 0-20 mA outputs drive variable frequency drives for pump speed control. The open-circuit diagnostic feature (active for output current >1 mA) helps maintenance teams quickly identify wiring faults, reducing downtime. These capabilities make the AO810 a reliable choice for continuous process industries where signal integrity is critical.

Installation Guidance

Mount the AO810 in an S800 I/O rack using compatible MTUs such as TU810, TU812, TU814, TU830, or TU833. The module has a keying code of AE to prevent incorrect insertion. Ensure the analog output is short-circuit secured to ZP or +24 V as specified. Use field cables up to 600 meters (656 yards) in length. The module operates at 0 to +55 °C (approvals issued for +5 to +55 °C) and stores at -40 to +70 °C. For vertical mounting in a compact MTU, the maximum ambient temperature is 40 °C (104 °F).

Maintenance and Reliability

The AO810 performs cyclic self-diagnostics, including process power supply supervision. If the supply voltage to output circuitry drops too low, the module reports a channel error. The front LEDs indicate Fault (F), Run (R), Warning (W), and Output State Protection (OSP). When an error is detected, the OSP function sets outputs to a predetermined state to maintain safe operation. Regular inspection of the module and its connections, following manufacturer guidelines, helps ensure long-term reliability in harsh environments with corrosion protection per ISA-S71.04: G3 and pollution degree 2.

Compatibility and Integration

The AO810 integrates seamlessly with ABB S800 I/O systems. It works with MTUs TU810, TU812, TU814, TU830, and TU833. The module uses a Modulebus interface with +5 V consumption of max 70 mA and no +24 V Modulebus current. It is groupwise isolated from ground and rated for insulation voltage of 50 V with a dielectric test voltage of 500 V a.c. For system expansion, the AO810 supports up to 600 meters of field cable, making it suitable for distributed I/O architectures.

Buying Guide

Before purchasing the ABB AO810, verify that your system uses S800 I/O mechanics and that the MTU matches your wiring requirements. The article number is 3BSE038415R1. Check your application’s signal range: the module supports both 0-20 mA and 4-20 mA outputs. For current availability and lifecycle status, contact BluePLC Industrial. Our team can help confirm compatibility with your existing control system and provide pricing and delivery options.