What is K1 K2 in safety relay?

Two relays (K1, K2) with positive-guided contacts provide the safe switching contacts. The device is designed in such a way that any faults in the input circuit are detected, e.g. contact welding on an emergency off/emergency stop pushbutton or on one of the safety contacts on the output relay.

What is the difference between a relay and a safety relay?

Safety relay is generally used for combination of switches, while relay is mostly used for linkage of contacts. They are used in different levels.

What do the symbols on a wiring diagram mean?

Thus in circuit diagrams and schematics, graphical symbols identify and represent electrical and electronic devices and show how they are electrically connected together while drawing lines between them represents the wires or component leads.

How does a dual channel safety relay work?

Dual channel devices can accept two inputs and have two independent circuits per input. Dual channel relays continually operate even in the event of a single circuit failure, and can detect wiring faults and input failure.

What is a master control relay?

In an electrical circuit, Master control relays are used to shut down a section of an electrical system. In ladder logic, MCR is used to turn ON one section of a programming line. An MCR option should be opened and closed properly.

How does a safety relay works?

A normal relay uses a wire coil and the mechanical movement of the metal contacts to switch the load on and off. The metal contacts may weld after repeated operation cycles. If this has happened, the machine would continue running if the operator pressed the emergency stop.

What is a safety relay module?

Safety Relay Modules Safety relays are coils and contacts that are designed to be positively driven and assure a reliable opening and closing for safety applications. Safety relay modules consist of safety relays that are controlled by built-in monitoring functions.