Published On: Sun, Feb 23rd, 2020

Solved practical problem

Author: Radoje Jankovic

Practical problem.

What this handy electrical scheme show, see Fig. 1. ?

Fig. 1. Dovod UPS napona 230 VAC iz… = UPS 230 VAC coming from…; UPS napon 24 VDC za razvod = 24 VDC feeders

The answer:

This practical scheme shows a typical scheme of obtaining a 24 V DC from 230 V AC voltage from a single UPS.

The diagram shows only two of several possible 24 V DC feeders for different needs, such as: supplying PLCs, I /O node modules, signaling, output activation relays, etc.

You give another example!

All circuit breakers as shown in the diagram have auxiliary contacts whose signals go to the PLC inputs and are intended to e.g. An operator or an on-duty electrician can immediately see where a “malfunction” is … which lets him know where to intervene.

Also, the failure of an “element” that is powered by 24 V, of course if this element has a contact whose signal goes to the PLC, etc.

As can be seen the rectifier is “grounded” to the main protective PE line or bus.

Also, for more 24 V consumers, two such power supplies can be connected in parallel to power eg DI modules, AI modules, PLC cabinet, signaling, encoders, various encoders, emergency switches, sensors, etc.

About the Author

- Radoje - Rade Jankovic Electrician, Electrical Technician, Electrical Engineer, PhD, Ecologist, Environmentalist, Designer, Educator, Investigator... Today PROFESSIONAL TECHNICAL WRITER AND DOCUMENTATOR Massive practical experience in almost all fields of electrical engineering over 40 years. My International education group in Facebook: EEEW - ELECTRICAL & ELECTRONIC EDUCATION WORLD where published more than 8000 small or bigger articles, lessons, technical advice, projects, technical calculations, test questions with and without answers, illustrated test questions with and without answers; all my original works and few thousands of may original photos from practice, drawings, circuit diagrams, environmental lessons and examples from everyday practice etc., etc.

Leave a comment

XHTML: You can use these html tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

Solved practical problem