1. Product Overview

The ABB DO890 3BSC690074R1 Digital Output Module is a high-performance 4-channel, 11 V, 40 mA digital output module specifically designed for use in hazardous area applications in process control systems. Each channel is equipped with intrinsic safety protection, allowing direct connection to process equipment such as Ex-certified solenoid valves, alarm sounders, or indicator lamps, without the need for additional external devices. The module supports open-circuit and short-circuit detection, and each channel’s monitoring threshold can be configured as required. The module provides power to drive Ex-certified devices by converting the 24 V power supply into the necessary output voltage. It is compatible with ABB’s TU890 and TU891 compact MTUs, offering two-wire connections for both Ex and non-Ex applications without additional terminal devices.

2. Key Features

• Channel Count: 4 channels, 11 V, 40 mA digital output.
• Fully Isolated: Each channel is completely isolated from other channels and the module’s power supply, ensuring excellent interference immunity.
• Intrinsic Safety: Built-in intrinsic safety protection allows direct connection to Ex-certified devices such as solenoid valves, alarm sounders, or indicator lamps.
• Output Status Indication: Each channel is equipped with status indicators to show real-time output and fault status.
• Open and Short Circuit Fault Detection: Each channel can detect open-circuit and short-circuit faults, enhancing system safety.
• Compatibility: Supports compatibility with TU890 (Ex applications) and TU891 (non-Ex applications) compact MTUs, offering simple two-wire connections.

3. Technical Specifications

Dimensions and Weight

General Information

Detailed Data

Diagnostics

4. Industry Applications

The ABB DO890 3BSC690074R1 Digital Output Module is highly suitable for a range of industries that require reliable and safe control of process equipment, especially in hazardous environments. The module’s intrinsic safety, fault detection capabilities, and compact design make it ideal for various demanding applications. Below are some of the key industry applications:

• Oil and Gas Industry
  The module is ideal for controlling Ex-certified devices in oil and gas applications, including solenoid valves, alarm sounders, and indicator lamps. Its intrinsic safety features ensure that it can be safely used in potentially explosive environments, such as offshore platforms or gas processing facilities.
• Chemical and Petrochemical Industries
  In chemical processing plants, safety is paramount. The DO890 module supports the control of critical safety equipment, ensuring that process parameters are maintained under safe conditions. The module’s fault detection functions help to prevent accidents in hazardous environments where precise control and immediate fault response are essential.
• Power Generation and Distribution
  The module’s robust design makes it suitable for power plants, particularly in situations where electrical safety and reliable control are critical. Whether it’s controlling emergency shutdown systems or other safety-critical equipment, the DO890 module helps ensure that power generation facilities operate safely and efficiently in potentially hazardous locations.
• Metallurgy and Heavy Industries
  In metal production plants and other heavy industrial sectors, the DO890 module provides reliable operation under tough conditions. It helps control critical systems such as blast furnace monitoring and safety shutdowns, offering high reliability for mission-critical operations in environments with high electrical interference and demanding operational conditions.