ABB S800 DP840 | 3BSE028926R1 Redundant Pulse Counting Module

Product Overview

The ABB DP840 (3BSE028926R1) is an 8-channel redundant pulse input module in the S800 I/O series, designed for integration with ABB Ability™ System 800xA. It converts incoming pulse signals from flow meters, encoders, tachometers, and similar sensors into digital values for frequency, position, or totalized counts. Redundant operation ensures uninterrupted data acquisition in critical process applications, while its modular design supports both single and dual-module configurations.

Key Features

High-Speed Pulse Processing

• Each channel processes pulses up to 20 kHz for fast mechanical and flow monitoring

• Configurable for pulse counting, frequency measurement, or position tracking

• Inputs can also function as standard digital inputs (DI)

Redundant Operation

• Modules can be paired for seamless backup in critical systems

• Hot Configuration in Run (HCIR) allows on-the-fly replacement or configuration without stopping operations

Versatile Sensor Interface

• Compatible with NAMUR sensors, 12 V DC, and 24 V DC devices

• Integrated field power simplifies wiring for connected sensors

• Individual channel input filters adjustable for signal quality

Diagnostic and Monitoring Functions

• Continuous self-diagnostics for internal electronics and field connections

• Front-panel LEDs indicate channel activity, module status, and fault conditions

• Detects wiring issues such as short circuits or open circuits for NAMUR inputs

Industrial-Grade Design

• Fits standard S800 I/O footprint for cabinet space efficiency

• Galvanic isolation protects the controller from electrical surges

• Compact, robust form factor suitable for harsh process environments

Technical Specifications

Applications

• Flow measurement for liquids and gases using pulse-generating flow meters

• Speed and position monitoring in rotating machinery

• Mission-critical processes requiring continuous pulse acquisition

• Integration with redundant or single-module S800 I/O setups

FAQ

Q: How many channels does the DP840 support?
A: The module provides 8 independent channels, each configurable for pulse, frequency, or position input.

Q: Can it operate in a redundant configuration?
A: Yes, two DP840 modules can be paired to provide seamless backup without data loss.

Q: Which field sensors are compatible?
A: NAMUR, 12 V DC, and 24 V DC transducers are supported. Inputs can also act as standard digital signals.

Q: Is hot-swapping possible?
A: Yes, HCIR functionality allows module replacement or configuration changes without interrupting the process.

Related Model Comparison

Product Tags

S800, Pulse Counting Module, Redundant Input, 8-Channel, High-Speed, NAMUR Compatible