SCHMERSAL Limit Switch Basics Overview Description

This article introduces the basic knowledge of a German Schmersal limit switch to help you increase this knowledge and its use value can be more played, as follows:
1 Overview 
The limit switch is mainly composed of a switch element, a terminal, a switch actuator and a transmission part. According to the mechanical mechanism of the switch contact being turned on and off, the switch element has the following two types:
Slow-acting switch: The switching-on and off-switching switching time is related to the switching operating speed. The faster the operating speed, the faster the switching of the switch.
Quick-acting switch: The switching time of the switch is turned on and off and the switch and the operated speed switch. As long as the switch operating part is operated to a certain position, the switch will be switched on and off. The time required for the spring to bounce, this time is extremely short and is a constant.
For the application of the following conditions, the quick-action limit switch should be used:
The switching contacts are turned on and off simultaneously;
When the contacts of the switch are separated by a certain distance, the device stops running. At this time, the possibility of the device being operated again due to vibration (the switch hysteresis effect) should be eliminated;
Schmidt SCHMERSAL limit switch basics overview
When the operating speed is extremely slow;
Schmidt Limit Switch Basics Overview
When the DC current is disconnected, the current arcing is required to disappear quickly.
The quality and technical specifications of the limit switch, in addition to meeting the international electrical standard indicators, there are important technical parameters such as switch mechanical life, protection to be graded, electrical performance, switching time accuracy and repeatability. These parameters are guaranteed for machine equipment products. Quality plays a vital role. Schmersal's switches are known for their long switch life, high repeatability and stable electrical contact performance. Each component of the switch is carefully treated from material purchase to production, and the quality is strictly controlled.
Schmidt SCHMERSAL limit switch basics overview
The outer casing of the switch is available in metal or plastic. The metal casing is die-cast zinc or die-cast aluminum, which has been treated with surface anti-rust treatment. It is resistant to seawater, oil and chemical gases. The plastic casing is made of glass fiber reinforced thermoplastic. It is durable and flame retardant. It meets UL standards. .
2. Affirmative disconnect type limit switch
It is sure that the disconnected switch means that when the switch operating component is actuated to the operating position, the normally closed contact of the switch is definitely disconnected and has a safety function. For such switches, the International Electrotechnical Commission IEC and Europe have corresponding requirements and standards, and are symbolized (International Electrotechnical, Germany).
The use of a positive disconnect switch can avoid the malfunction and malfunction of the ordinary switch, and ensure that when the switch is operated to the normally closed contact open position, the normally closed contact is definitely disconnected, so that the working power of the device is disconnected to prevent malfunction. And the occurrence of an accident.
Our slow-acting switches Z235, T236, T256, T336 and T355 and snap-action limit switches Z235, Z236, Z256, Z335, Z355 and Z332 all contain a normally open contact that is permanently open and has a safety function and is therefore marked with And logo, and has European CE certification.