Germany Pilz automatic switching element with isolation function PILZ relay: PILZ relay is an automatic switching element with isolation function, widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, is one of the important control components. After a certain period of time, the piston rod drops to a certain position, and the delay contact action is pushed by the lever to disconnect the dynamic contact and close the dynamic contact. The time between when the coil is energized and when the delay contact completes the operation is the delay time of the relay. The length of the delay time can be changed by adjusting the size of the air inlet hole in the air chamber with a screw. When the suction coil is de-energized, the relay recovers by recovering from the action of the recovery spring. The air is quickly expelled through the air outlets.
HOW PILZ SAFETY RELAYS WORK: PILZ SAFETY RELAYS WORK BY TURNING AN INPUT SIGNAL INTO ONE OR MORE ELECTRONIC COMPONENTS OF AN OUTPUT SIGNAL. Its input signal is the energizing or de-energizing of the coil. Its output is the action of the contact (with normally open point closed, normally closed point open), and its contacts are connected to other control loops, through which the change of the contact leads to a change in the control loop (e.g. on or cut-off), so as to achieve the intended purpose of control or protection. In this process, the relay mainly plays the role of transmitting signals. THE WORKING PRINCIPLE OF A PILZ RELAY IS A CONTROL APPLIANCE THAT USES ELECTROMAGNETIC OR MECHANICAL PRINCIPLES TO ACHIEVE DELAYED CONTROL. There are many types of it, including air damping type, electric type and electronic type.
One is the isolation effect;
The second is to increase auxiliary contacts. In practical applications, there are fewer contacts to be added, because the current contactor can add many pairs of auxiliary contacts, and the operation is also reliable, so there is no need to add auxiliary relays in the general control day circuit. And the isolation effect is used more in the current control.
There are two main aspects of isolation:
One is to separate a control loop into two or even more relatively independent loops;
The second is to convert the analog signal of strong power into switching quantity source or passive through the intermediate relay).
The emphasis here is not on the role of these relays, but on the analysis of technical problems in the application of intermediate relays and the proposed solutions through engineering examples.
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