Search Results for: 4
- PLC
How to write a PLC ladder logic program?
The ladder logic programming is commonly used to program PLCs. A PLC takes input from field devices and based on the programming instructions…
Read More » - Instrumentation
Hazardous Areas and Zonal Classification
Introduction A HAZARDOUS area / environment may be potentially prone to: • An accident • The creation of a dangerous…
Read More » - Instrumentation
Difference between IEC 61508 & IEC 61511 SLC Version
Introduction Each phase of the lifecycle requires input information and delivers output information. The relevant clauses of the standards define…
Read More » - Temperature Measurement
Fiber Optic Temperature Sensors
Fiber optic temperature sensors are used where the temperature measurement is made in hostile environments, in the presence of electromagnetic,…
Read More » - Instrumentation
What is Safety instrumentation system?
Introduction Safety instrumentation is not exclusively a matter of instrument engineering and control.The successful implementation of a security system project…
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Active and passive instruments
Introduction We can divide instruments into active and passive according to the consumption of power.”Active” means is that some component…
Read More » - Electrical
3 PHASE Transformers – different connections
What are transformers? The transformer is a static piece of apparatus which transfers electrical energy from one circuit to another,…
Read More » - Automation
DIFFERENCE BETWEEN DCS ,PLC AND SCADA
DIFFERENCE BETWEEN DCS ,PLC AND SCADA SCADA (Supervisory contol and Data Acquisition) is essentially a computer based (usually PC nowadays) system for…
Read More » - Instrumentation
Electronic and pneumatic Load cells
Load cells are transducers that are used to convert work, force or pressure into an electrical signal. Load cells are…
Read More » - Instrumentation
How does an optical Encoders works?
Introduction The encoders use rotating discs with optical windows, as shown in the figure below. The encoder contains an optical…
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