ABB Bailey IIATS41 – A Compact Solution for Alarm Transmission

The ABB Bailey IIATS41 delivers reliable alarm signal transmission in automation systems. This module measures 120 mm in width and 85 mm in height. It weighs only 0.45 kg, making it easy to integrate.

Core Technical Parameters and Design

The ABB Bailey IIATS41 includes one RS-485 serial interface for data exchange. It uses four digital input channels and two relay output channels. Each channel supports voltage levels from 24V DC to 48V DC. The device stores minimal energy internally for transient protection. It contains no battery, so maintenance stays low. The module operates within a temperature range of -20°C to +70°C.

Energy Storage and Component Breakdown

This intelligent alarm transmitter has three main internal boards. One board handles logic processing, while another manages I/O isolation. The third board controls power regulation and filtering. Total capacitance across all boards reaches 220 µF. This small storage prevents unexpected shutdowns during micro-power dips. The ABB Bailey IIATS41 draws only 120 mA at 24V DC under normal load.

Performance and Installation Overview

You can mount this unit on a standard DIN rail in any control cabinet. It communicates with host systems using Modbus RTU protocol. The ABB Bailey IIATS41 detects open circuits and short circuits on field wiring. Below is a quick summary of its key specifications.

The alarm transmitter checks for signal loss every 50 milliseconds. It then flags any fault condition within two scan cycles. This speed ensures your process receives timely warnings. For replacement or new installations, the ABB Bailey IIATS41 fits most legacy Bailey systems. You do not need extra adapters or software patches. The front panel LED shows power, communication, and alarm status at a glance.