ABB DSDI110AV1 3BSE018295R1 Digital Input (DI) Module

The ABB DSDI110A V1 is a Digital Input (DI) Module from the Advant Controller 400 Series and more specifically, part of the S800 I/O family. It is a module that plugs into a rack or base unit and is responsible for reading the state (ON/OFF) of field devices and transmitting that data to the central controller (PLC or DCS).

The part number 3BSE018295R1 is the specific article code used for ordering and identification.

Key Specifications

Feature

Specification

Product Family

ABB Advant Controller 410 / S800 I/O

Function

Digital Input Module

Channels

16 (Sixteen)

Input Type

Sinking or Sourcing (configurable)

Input Voltage

24 V DC (Nominal)

Logic Levels

'0' (OFF): -30 to +5 V DC; '1' (ON): +11 to +30 V DC

Electrical Isolation

500 V AC between field side and system side

Connection

Via a separate Termination Unit (TU) like the S800 TB841 or TU843

Module Type

Single-width S800 I/O module

Status Indicators

Per channel: Green LED for ON state. Module status: OK, RUN, ERR LEDs.

Detailed Description

1. Role in a Control System

In a Distributed Control System (DCS) or Programmable Logic Controller (PLC) system, this module acts as the "eyes" for digital signals. It connects to devices in the field that have a simple on/off state, such as:

• Push Buttons and Selector Switches

• Limit Switches and Proximity Sensors

• Pressure Switches and Level Switches

• Motor Run Contacts and Circuit Breaker Auxiliary Contacts

The module converts the 24V DC signal from these devices into a logic-level signal that the central processor can understand and use in its control program.

2. Key Features and Benefits

• High Density: With 16 channels in a single module slot, it saves space in the control cabinet.

• Flexible Wiring: The use of a separate Termination Unit (TU) makes wiring, maintenance, and module replacement much easier and faster. The wiring remains on the TU, so the module itself can be hot-swapped without disturbing the field cables.

• Robust and Reliable: Designed for harsh industrial environments with electrical noise, vibration, and wide temperature ranges. The 500V isolation protects the sensitive system side from voltage surges on the field side.

• Diagnostic Capabilities: The LEDs on the front provide immediate visual status for each channel and the overall health of the module, aiding in rapid troubleshooting.

• Hot Swappable: As part of the S800 I/O system, it can typically be replaced while the system is powered and running ("hot"), minimizing downtime.

3. System Compatibility & Required Components

This module does not work alone. It requires other components from the ABB S800 I/O system:

• S800 Station: The physical framework that holds the modules.

• Base Unit (e.g., BU847): The unit that the module physically plugs into. The base unit provides the communication bus and power to the module.

• Termination Unit (e.g., TU841, TU843): This is where the actual field devices are wired. The TU then connects to the DSDI110A module via a ribbon cable.

• Power Supply: A 24V DC power source for the field devices.

• Controller/Master: An ABB AC 410 or AC 800M controller, or a Profibus/Foundation Fieldbus master that manages the I/O communication.

Common Applications

This module is found in a wide range of industrial automation sectors, including:

• Oil & Gas

• Chemical and Petrochemical

• Power Generation

• Pulp and Paper

• Water and Wastewater Treatment

• Marine

Summary

The ABB DSDI110AV1 3BSE018295R1 is a 16-channel, 24V DC digital input module from the proven S800 I/O platform. It is a fundamental building block for reading binary signals in large-scale industrial control systems, prized for its reliability, high density, and ease of maintenance.