Many types of relays are used in industrial applications today. Fig. 1 (below) shows several of the more common types of relays. These relays may be soldered on a printed circuit board or mounted in an electrical panel. Some of the relays use a socket-type mounting arrangement so that they can quickly be removed and replaced during troubleshooting. Some of the relays have a clear plastic case as a cover so that the technician can see whether the contacts are open or closed.
Above: Fig. 1: Types of industrial relays that include
plug-in type relays, relays mounted in industrial panels and relays that
are mounted in printed circuit boards.
