What does changeover contact mean?

A “change-over” closes one circuit and simultaneously opens a second circuit. Thus a “change-over” simultaneously fulfils the function of a “normally open” and also a “normally closed” contact.

What is a Form B contact?

A Form B contact is single throw, normally closed, opens when relay is operated. A single pole relay will have only one set of switch contacts. Double Pole will have two sets, so can switch two circuits. Relays are available with four or more poles. The Form A, B, and C terminology is also used with switches.

What is NC and no contact?

NC means normally-closed contact. NO means normally-open contact. When the relay coil is de-energized, NC contact becomes open, and NO contact closes. For alert and emergency shutdown (ESD) logic, a break-to-alarm philosophy is employed so that during an emergency, NC contact will become open and trip/provide alarm.

What is relay contact form?

Contact Form: The arrangement of the contacts in the relay. This determines how many circuits the relay can operate. Form 1A (or “1 Form A): One circuit being opened and closed with the contacts in a Normally Open position.

Who are the owners of MTI form x?

FORM-X | A Division of Morse Technologies Inc (MTI) is a manufacturer and service provider to the electronics industry. Welcome! We are a 3 generational family owned & operated business serving the plastic screen-printing, injection molding and related membrane switch industry by filling a service void by competition.

How is form x different from Form C?

It differs from both Form C and Form D by normally open position in the center where neither connection is made. This form is common in SPDT toggle switches. A “ Form X ” is basically 2 Form A contacts, forming a double make configuration. This can also be described as SPST-NO.

When to use form a or Form B contacts?

A “Form A” would mean the contacts are normally open when the coil of the relay is not energized or the there is no magnetic field nearby in a reed switch. A “Form B” would mean the contacts are normally Closed when the coil of the relay is not energized or the there is no magnetic field nearby in a reed switch.

How to create your own free contact form?

Create your own contact form in just a few seconds. Of course, it is for free and it includes integrated anti-spam capabilities. Which form fields would you like to include in your personal contact form? Please specify which fields are required. These required fields must be filled out by the user or the form will not be submitted.