Description

ABB TB840A 3BSE037760R1 

This high-performance, high-reliability 16-channel digital input module is part of ABB’s powerful TRIO I/O system family. It is a classic and key component for acquiring field digital signals when building distributed control systems. It is particularly suitable for process industries where reliability and safety are paramount.

 

Detailed Product Description

1. Primary Function

• 16-Channel Digital Input: Can connect 16 independent field digital devices simultaneously.

• Dry Contact/NAMUR Sensor Input: The module is designed to receive signals from “dry contacts” (e.g., mechanical switches, relay contacts) or intrinsically safe sensors complying with the NAMUR standard (e.g., proximity switches, level switches).

• Diagnostics and Status Indication: Each channel is equipped with an LED indicator to display the input status (e.g., signal normal, wire break, short circuit), facilitating quick troubleshooting and maintenance.

• Electrical Isolation: The module typically provides electrical isolation between channels, and between the channels and the backplane bus. This effectively prevents damage caused by interference and potential differences, enhancing system stability and reliability.

2. Technical Specifications

• Input Type: Digital Input, compatible with dry contacts and NAMUR sensors.

• Number of Channels: 16

• Rated Voltage: Typically 24V DC (please verify with the manual for specifics).

• Backplane Communication: Communicates with the TRIO Interface Module (e.g., CI871) via a dedicated TRIO bus.

• Electrical Isolation: Yes, typically between channels and from the system.

• Diagnostic Functions: Supports diagnostics for wire break and short circuit.

• Certifications: Typically holds international certifications like CE, UL, ATEX (for hazardous areas).

3. Role in the System Application

The TB840A module is not a standalone controller. It must be used with the following components to form a complete remote I/O station:

1. TRIO Interface Module: e.g., ABB CI871, which acts as the “brain,” responsible for communicating with the upper-level control system (like ABB’s 800xA or AC 800M) via a fieldbus (e.g., PROFIBUS DP, PROFINET, Modbus TCP/IP).

2. TRIO Power Supply Module: Powers the entire TRIO station, including the TB840A module.

3. TRIO Base Unit: The TB840A module needs to be plugged into a specific base unit (e.g., ABT-TB series), which provides mechanical mounting and electrical connectivity.

Workflow:
Field digital device (e.g., a level switch) -> Connected to the TB840A module -> TB840A processes the signal and transmits it via the backplane bus -> To the CI871 Interface Module -> CI871 transmits the data via fieldbus -> To the central control system (e.g., DCS/PLC).

4. Key Features & Advantages

• High Reliability: Designed for harsh industrial environments, offering high noise immunity and stability.

• Modularity & Flexibility: Can be flexibly combined with other types of TRIO I/O modules (e.g., analog input/output, relay output) in the same station, configured according to actual needs.

• Easy Installation & Maintenance: Clear channel indicators and modular design make wiring, diagnostics, and replacement very convenient.

• Cost Savings: As a distributed I/O, it allows I/O points to be placed close to field devices, significantly reducing wiring costs and complexity from the control room to the field.

• Intrinsic Safety Support: Native support for NAMUR sensors makes it ideally suited for use in process industries requiring intrinsic safety (e.g., chemical, oil & gas).

5. Typical Application Industries

• Chemical and Petrochemical

• Oil and Gas

• Pharmaceutical Industry

• Water and Wastewater Treatment

• Power and Energy

• Pulp and Paper

 

Sales of the brand:

ABB、EPRO、GE、FOXBORO、Schneider、Rexroth、Honeywell、Bently、YASKAWA other global DCS system and PLC system, servo system of famous industrial brand.

 

☀️Tara(Sales Director)

📞Tel: + 86-13806028623

📮Whatsapp:+86-13806028623

💬Email: ydf8801@163.com

🏚️Ship to you via DHL/TNT/UPS/EMS/Fedex

🥇Product Condition: One-year warranty

 

Company Overview

Main Products

We specialize in supplying original imported spare parts for DCS, PLC, robotics, and large servo systems from leading global brands, including:

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