Volt Free Contact Schematic

In otherwords you can use them as you described in your second post.

Volt free contact schematic. This allows the user to connect it to any circuit potential of choice within reason. A volt free contact is normally independant of the main contact and can be used for switching external equipment such pumps or a lamp or buzzer using a different voltage such as 12 24v or even switching a computer module for a building management systems or similar applications the rating of the volt free contact is normally the same as the main contact. Each contact is a piece of electrically conductive material typically metal when a pair of contacts touch they can pass an electrical current with a certain contact resistance dependent on surface structure surface chemistry and contact time. Volt free and dry contact mean the same thing.

A voltage free contact is any kind of switching circuit that is isolated does not introduce any potential into the user circuit and is not referred to ground or a supply rail. If a control system supplier offers a dry contact for you to read as a status bit then he is offering to close a contact relay or contact output that is nothing more that a stand alone set of contacts with no voltage current or anything else impressed across the contact set. Contact that is no voltage free has a built in power supply or similar. Volt free and dry contact mean the same thing.

Volt free contacts or volt free switches are invariably mechanical contacts with no electrical connection to any other part of the equipment the contacts being open and closed mechanically by a solenoid or other device. When the pair is. An electrical contact is an electrical circuit component found in electrical switches relays connectors and circuit breakers. If a control system supplier offers a dry contact for you to read as a status bit then he is offering to close a contact relay or contact output that is nothing more that a stand alone set of conta.

Only that they have no voltage related to the logic or relay that is driving actuating them. You have two circuits one for the relay coil and one which is volt free the contacts. Volt free contacts or volt free switching does not operate a system without any voltage as the description of it may imply. A thermostat or timer with volt free contacts or volt free switching operates a switch that opens and closes its contacts but no voltage or current will flow.

The contacts are used to tie two individual pieces of electrical equipment together so the action on one. A volt free contact is a set of contacts that uses a voltage source from another location. The most obvious example is a pair of relay contacts which are truly volt free. The volt free contacts do not remain volt free after the voltage of the circuit it is controlling is applied.