ProductPRODUCT
Featured products
Contact Us
- ABB Bailey
- NDSI01 6635905A1
- Digital Input Module
- Sweden (SE)
- 150 × 150 × 50 mm
- 0.5 kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
- DHL, UPS, TNT, FedEx and EMS.
- 24-Hour Service
- COO
- 20
Our advantage
Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
| Company Information | |||
| [email protected] | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |
Product Overview
The ABB Bailey NDSI01 (part number 6635905A1) is a digital input module designed for ABB INFI 90 / Network 90 distributed control systems (DCS). It allows the acquisition of digital signals from field devices and transmits them to the control system for monitoring and logic processing.
The module is ideal for industrial applications requiring reliable digital signal monitoring, such as switch contacts, relay outputs, and binary sensor signals.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | ABB (Bailey) |
| Model / Part Number | NDSI01 / 6635905A1 |
| Product Type | Digital Input Module |
| System Compatibility | INFI 90 / Network 90 DCS |
| Function | Acquisition of digital (binary) signals from field devices |
| Input Type | Digital ON/OFF signals, relay contacts, switches |
| Channels | Multi-channel digital input support |
| Installation Type | Rack-mounted module |
| Application | Process monitoring and digital signal acquisition |
| Dimensions | 150 × 150 × 50 mm |
| Weight | 0.5 kg |
Function and Working Principle
The NDSI01 module converts physical digital signals from the field into logic data for the control system:
- Receives ON/OFF signals from field devices (e.g., switches, relays)
- Performs signal conditioning, including isolation and filtering
- Transmits processed signals to DCS controllers for logic evaluation
- Supports alarm generation, interlocks, and control logic decisions
- Operates continuously for reliable industrial monitoring
This ensures accurate, real-time digital signal acquisition for industrial processes.
Role in Industrial Control Systems
In ABB Bailey DCS architecture, the NDSI01 module serves as a primary interface for digital inputs:
- Collects digital signals from sensors, switches, and relays
- Provides data to controllers for processing logic, alarms, and interlocks
- Supports redundancy and diagnostic features
- Enables process automation by accurately representing field states in the DCS
Industrial Applications
The NDSI01 module is widely used in:
- Power generation and distribution systems
- Oil, gas, and petrochemical plants
- Water and wastewater treatment facilities
- Chemical and pharmaceutical production plants
- Industrial automation requiring precise digital monitoring
Installation and System Integration
For proper operation:
- Mount in a compatible ABB Bailey rack or chassis
- Connect field wiring to the module’s input terminals
- Configure input types and channels in the DCS software
- Verify signal transmission to controllers
- Perform regular maintenance and signal integrity checks
Compatible System Components
The NDSI01 module interfaces with:
- ABB Bailey controller modules (NCOM02, IMCOM03)
- Digital output modules (NDSO series)
- Logic interface modules
- Rack power supply and communication modules
- Operator interface stations
Recommended Alternative Models
| Model | Product Type | Key Feature | Application |
|---|---|---|---|
| NDSI01 / 6635905A1 | Digital Input Module | Multi-channel digital signal acquisition | INFI 90 systems |
| NDSI02 | Digital Input Module | Expanded digital input channels | Industrial automation |
| IMDSI02 | Digital Input Slave Module | Slave digital input interface | Distributed DCS |
| NASM03 | Analog Slave Module | Analog signal acquisition | Mixed analog/digital systems |
Key Advantages
- Accurate, real-time digital signal monitoring
- Multi-channel input support
- Reliable integration with ABB Bailey DCS
- Supports process alarms, interlocks, and logic control
- Compact and robust industrial design
- Simplifies field-to-controller digital communication
- Durable for continuous industrial operation
Technical FAQs
What is the primary function of the NDSI01?
It acquires digital ON/OFF signals from field devices and transmits them to the ABB DCS for monitoring and logic processing.
Can it handle multiple digital inputs?
Yes, it supports multiple channels for simultaneous digital signal acquisition.
Does it perform control actions?
No, it only collects input signals; control actions are handled by the controllers.
Which systems use this module?
ABB INFI 90 and Network 90 distributed control systems.
Conclusion
The ABB Bailey NDSI01 (6635905A1) Digital Input Module is a reliable and precise solution for digital signal acquisition in industrial automation. Its accurate input processing and robust design make it a critical component for control, monitoring, and safety applications within ABB Bailey DCS installations.