What is a door interlock switch?
Safety interlock switches are used as interlock devices that can prevent machine operation or startup in an unsafe situation, such as when a door or guard is open. Interlock devices with a locking function can also prevent doors or guards from being opened while the machine is in operation.
Where is the door interlock safety switch located?
Hinge interlock safety switches fit to the hinged axis of machine guard doors. The switch body fits to the door frame and the actuator fits to the door.
What is a safety interlock circuit?
In order to safely transfer the power source from a generator (and back to the main), a safety interlock is often employed. The interlock consists of one or more switches that prevent both main power and generator power from powering the dwelling simultaneously.
What is the most common type of interlock switch?
Mechanical interlock safety switches
It is possible to install multiple switches onto a door to increase security. Mechanical interlock safety switches are the most popular of the safety switches; however, they can become misaligned after time when doors or fences sag.
How many types of interlocks are there?
Interlocking types. Interlockings can be categorized as mechanical, electrical (electro-mechanical or relay-based), or electronic/computer-based.
What is door safety switch?
Interlock Switches detect the opening of guards or doors for prevention of access to hazardous areas and safely stop machines.
What is a tongue interlock switch?
Safety Switches (Tongue Interlock) They are designed to provide robust position interlock detection for moving guards. The switch is rigidly mounted to the frame of the guard or machine. The actuator is fitted to the moving part (frame) of the guard and is aligned to the switch entry aperture.
What are the three types of interlock?
There are three types of interlocks: – mechanical, – electrical, – logical.
What is a Category 2 safety circuit?
Category 2: Main Safety Functions Monitors operation at an appropriate interval using a control system. 2. Monitors contact welding using safety relays. Note:Safety functions will be lost by a single failure, such as a short-circuit failure in the input wiring.
How does an interlock circuit work in a computer?
This is called interlocking, and it is accomplished through the use of auxiliary contacts on each contactor, as such: Now, when M 1 is energized, the normally-closed auxiliary contact on the second rung will be open, thus preventing M 2 from being energized, even if the “Reverse” pushbutton is actuated.
When do you use an interlock door switch?
Hinge-Actuated Safety Switches Replace access door hinges with these switches; they actuate when the door opens at least 4°. Also known as interlock switches, they ensure the safety of personnel by automatically shutting off power to machinery when an access door opens.
Is the hs5e series a safety interlock switch?
The HS5E series safety interlock switch provides a cost effective solenoid door interlock in a compact housing. A total of 8 circuit configurations for both spring and solenoid lock types can be found with standard 3 meter cable.
When to use a non contact safety interlock?
HS7A-DMP Non-contact magnetic safety interlock switches perform the same functions as standard mechanical safety interlock switches, but are designed to be used in applications where non contact is desired between the switch and its actuating key. It’s also being used where space is at a premium.