ABB DP820

Description

Detailed Parameter Table

ABB DP820

Product Introduction

The DP820 is a high-performance digital input module from ABB, designed for the S800 I/O system to monitor discrete signals in industrial automation. As a key component in ABB’s distributed I/O portfolio, it converts physical switch states (e.g., limit switches, pushbuttons, and relay contacts) into digital data for the AC800M controller, enabling real-time status tracking of field devices.

With 8 configurable channels, the DP820 supports both sinking and sourcing input modes, making it compatible with diverse wiring configurations. Its 2.5 kV isolation protects the control system from electrical noise, while a wide operating temperature range (-40°C to +70°C) ensures reliability in harsh environments—from frozen food processing plants to desert solar farms. Whether integrated with safety interlocks or equipment status sensors, the DP820 delivers fast response times (as low as 1 ms) and robust diagnostics, forming a critical link between field devices and the control layer.

Core Advantages and Technical Highlights

Flexible Input Compatibility

The DP820 supports both dry contacts (mechanical switches) and 24 V DC electronic inputs, eliminating the need for separate modules in mixed-signal environments. In a packaging machine, it can simultaneously monitor:

Dry contact signals from door interlocks

24 V DC signals from photoelectric sensors detecting product presence
This versatility reduces inventory costs and simplifies cabinet design.

Fast Response Time

With a configurable 1 ms response time, the DP820 captures rapid signal changes—critical for high-speed applications like conveyor sorting systems. In an automotive assembly line, it detects the position of moving parts with microsecond precision, triggering downstream actuators via modules like the SPDSO14 to ensure synchronized operation.

Robust Diagnostics

Integrated open circuit detection alerts operators to broken sensor wires or loose connections. In a water treatment plant, this feature immediately flags a failed level switch signal, preventing pump run-dry incidents. Channel status LEDs provide at-a-glance visibility, reducing troubleshooting time by 50% compared to non-indicated modules.

ABB DP820

Typical Application Scenarios

Industrial Machinery Monitoring

In a CNC machine tool, the DP820 monitors:

Emergency stop button status (dry contact)

Tool changer position sensors (24 V DC)

Coolant flow switches (sinking input)
Data from the module is transmitted to the AC800M controller via the S800 I/O bus, enabling real-time machine protection and process optimization. Its -40°C to +70°C operating range ensures reliability in factory environments with temperature fluctuations.

Building Automation Systems

In a smart building’s HVAC control panel, the DP820 connects to:

Fire alarm dry contacts

Damper position switches

Occupancy sensor 24 V DC outputs
Paired with the CM579-PNIO 1SAP170901R0001 communication module, it integrates with BMS systems to trigger ventilation adjustments or emergency shutdowns, enhancing energy efficiency and safety.

Related Model Recommendations

SP820: 8-channel digital output module that pairs with the DP820 for complete I/O control loops.

TB820V2: Terminal base required for mounting the DP820, featuring secure screw terminals for field wiring.

AC800M PM864: Controller that processes input data from the DP820 for logic execution.

CM579-PNIO 1SAP170901R0001: Profinet module enabling remote monitoring of DP820 status in distributed systems.

1SVR011700R0000: 24 V DC power supply to energize the DP820 and connected sensors.

DI820: 16-channel variant of the DP820 for larger-scale input monitoring.

AI815 3BSE052604R1: Analog input module complementary to the DP820 in mixed-signal systems.

Installation, Commissioning and Maintenance

Installation Preparation

Mount the TB820V2 terminal base on a 35 mm DIN rail, leaving 20 mm clearance for airflow.

Connect field wiring (0.5-1.5 mm²) to terminals 1-16 (channels 1-8, each with positive and negative inputs).

Attach the DP820 to the terminal base until it clicks into place, ensuring proper alignment with the backplane connector.

Connect 24 V DC power to the terminal base, verifying polarity to prevent damage.

Maintenance Suggestions

Daily Checks: Verify green power LED and channel activity LEDs (illuminated when input is active).

Quarterly Inspections: Tighten terminal screws to 0.6 Nm and clean dust from the module using compressed air.

Troubleshooting: If a channel fails, swap the sensor to a spare channel to isolate issues. Replace the DP820 if internal faults are confirmed, ensuring the replacement module is configured with matching input parameters.

Service and Guarantee Commitment

The DP820 is backed by a 3-year warranty covering manufacturing defects. ABB’s technical support provides guidance on integration with S800 I/O systems and troubleshooting via global 24/7 hotlines. Customers receive access to detailed manuals, including wiring diagrams and configuration guides. With ABB’s global distribution network, replacement modules are readily available to minimize downtime in critical applications.