Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: What is Namur Digital Input Card?
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > PLC Tutorials > What is Namur Digital Input Card?

What is Namur Digital Input Card?

Last updated: March 4, 2021 12:15 pm
Editorial Staff
PLC Tutorials
No Comments
Share
2 Min Read
SHARE

What is Namur digital input card? And what it is used for? 

If you open the hardware configuration in the SIMATIC manager platform for Siemens PLC programming software and want to add a digital input card to your project you will notice some digital input modules with suffix NAMUR.

Namur Digital Input

NAMUR DI modules have the ability to receive NAMUR sensors signals and can detect if the sensor status is on, off, wire broken, or sensor short-circuited. But how the PLC can detect that?

Namur Digital Input Card

From the above figure the NAMUR sensor circuit composed of sensing switch and resistances, the NAMUR DI module can detect the sensor resistance in the following cases.

In case of the sensor is off

The sensor’s total resistance = 10 KΩ+ 1 KΩ= 11KΩ

In case of the sensor is on

The sensor’s total resistance = 1 KΩ

Because in that case the 1 KΩ resistor is neglected by the ohms law

In case of wire broken

The sensor’s total resistance = ∞

In case of sensor short circuit

The sensor’s total resistance = 0

So the NAMUR sensor is a special digital sensor with a special modules to be connected to. But why we need all of this?

In some plants, there are sensors in critical positions where it’s important to know if the sensor is broken before it’s too late. Or in other plants, it’s used for personal safety protection and in minor cases to prevent electricians from bypassing the terminals of the sensor in order to simulate sensor on status.

Author: Karim Ali Anwar

If you liked this article, then please subscribe to our YouTube Channel for PLC and SCADA video tutorials.

You can also follow us on Facebook and Twitter to receive daily updates.

Read Next:

  • What is Namur NE 43?
  • What is Namur NE 107?
  • 2 wire Sensors Operation
  • 4-20 mA Namur Current Signals
  • Programmable Logic Controller
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

PLC Programming for Traffic Barrier Control
Latching and Unlatching in PLC Programming Example
PLC Analog Input Conversion Formula
Free Allen Bradley PLC Ladder Logic Training Course
Advanced PLC Conveyor Control: Forward and Reverse Rotation
PLC Program for Two Way Switch Logic
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

PLC Program for Mixing Tank
How to Start Writing SCL Language in Siemens Tia Portal?
Readings Mismatch between Field & Control Room ? Why
Industrial Networking and Wireless Interview Questions
Concept of DCS in Industrial Automation
PLC Configuration of Profinet I/O System
PLC based Automatic Packaging System
Industrial Automation and Control Systems (IACS)

Keep Learning

Different PLC available in the Simatic S7 generation

Overview of SIEMENS PLC – S7-1500, S7-1200, S7-400, S7-300

PLC Totalizer

PLC Program for Flow Totalizer

Shift Bit Register in PLC

Shift Bit Register in PLC

PLC Programming Example for a Batch Process

PLC Programming Example for a Batch Process

Electrical Drives Animation

Electrical Drives – Modes, Types, Speed Control Applications

PLC Programming Example on Timers Function Block

PLC Programming Example on Timers Function Block

PLC Boxes Sorting Based on Height

PLC Programming: Sorting and Distribution of Boxes by Height

PLC Programming Software

What Factors Affect the Choice of PLC Programming Software?

Learn More

Bi-metal Temperature Gauge

Bi-metal Temperature Sensors

Yokogawa DCS Tutorials - Configuration of Analog Input (Transmitter)

Yokogawa DCS Tutorials – Configuration of Analog Input (Transmitter)

Closed-tank-DP-Level-Transmitter-with-cleaning-leg-Calibration

Closed tank DP Level Transmitter with cleaning leg Calibration

Solar Energy

Types of Renewable Energy Sources

Magnetostrictive Transducers Objective Questions

Magnetostrictive Transducers Objective Questions

Tank Gauging Measurement

Purpose of Tank Gauging Level Measurement

Configure an IP address

What is an IP address? How to Set IP Address of the Computer?

Thermodynamic cycle

Thermodynamic Cycles in Power Plant

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?