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AMAZON multi-meters discounts AMAZON oscilloscope discounts Most relays used in industrial circuits have the ability to have their contacts changed from NO to NC in the field. In other words, a technician can remove several screws and mount the contacts upside down and they will change from NO to NC, or vice versa. Ill. 1 shows an example of this type of contact. This feature makes adding NO or NC contacts very easy. It also makes it simple to change a set of NO contacts to NC at the time it's needed. Since these contacts are actually cartridges, additional sets of contacts can be added to a relay at anytime as long as there is room. In some cases a second deck is added to the relay so more contacts can be added.
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Sets of NO (Normally Open) and NC (Normally Closed) Contacts | Pull-In and Hold-In Current | Home |