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Limit switches are critical components in industrial machinery, providing safety and control over equipment operation. With various types available, understanding the differences is essential for selecting the right switch for a specific application.
A limit switch is a safety device used to control or direct the motion of a machine. It consists of a switch that is mechanically operated to make or break an electrical circuit when a machine reaches a predetermined position. Limit switches are commonly used in industrial automation, robotics, and machinery to prevent over-travel, provide position feedback, and ensure safety.
TYPES OF SWITCHES
8104, 8107, 8108, 8111, 8112, 8122, 8166, 8169, 9101
Mechanical limit switches are the most common type, consisting of a lever arm that actuates a set of electrical contacts when moved by a machine part. They are reliable and cost-effective, making them suitable for a wide range of applications.
| Operation speed | 0.5mm-50cm/sec |
| Operating frequency | Mechanical: 120 operations/minute Electical: 30 operations/minute |
| Contact resistance | 25mΩ max.(initial value) |
| Insulation resistance | 100mΩ min.(below 500VDC) |
| Dielectric strength | 1000VAC, 50/60 Hz for 1 minute between terminals of the same polarity |
| 1500 VAC, 50/60 Hz for 1 minute between current-carrying and non-current-carrying metal parts | |
| 1500 VAC, 50/60 Hz for 1 minute between each terminal and groun | |
| Vibration | 10-55 Hz,15 mm double amplitude |
| Shock | Mechanical durable: 1,000m/Sec(about 100G’S)Malfunction:300m/Sec'(about 30G’S) |
| Ambient temperature | -5~+65℃(With no icing) |
| Humidity | <95%RH |
| Life | Mechanical:10,000,000 operations above
Electrical: 500,000 operations above |
| Weight | About 130 to 190g |
| Degree of protection | IP65 |
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