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Wireless anti-overwrap switch SM40-WK01
A wireless anti-overwind limit switch is an electrical automatic protection switch used for the anti-overwind limit of steel wire ropes in hoisting machinery. It is equipped with a counterweight of appropriate weight. When the hook moves up and down to lift or lower the counterweight, the switch is opened or closed to automatically cut off the power supply of the hoist and connect the braking system to limit the overwinding of the steel wire rope and to achieve the purpose of lifting and lowering the hook within a certain height.
Overview:
The wireless anti-overwind limit switch is an electrical automatic protection switch used for overwind limit protection of steel wire ropes in hoisting machinery. It is matched with a counterweight of appropriate weight. When the hook moves up and down to lift or lower the counterweight, the switch is opened or closed to automatically cut off the power supply of the hoisting machine and connect the braking system, limiting the overwinding of the steel wire rope and achieving the purpose of lifting and lowering the hook within a certain height.
Features:
- Reliable performance, sensitive action
- Switch contacts use precious metal materials, reliable contact
- Multiple working modes
- Wireless, directional, long-distance, wall-penetrating control function
- Signal coverage within a 50-meter radius, capable of penetrating 2-3 walls
Electrical Connections:
Technical Data:
| Item Type | Technical Parameters |
| Transmitter Supply Voltage | 5-10.5VDC (6F22 battery powered) |
| Receiver Supply Voltage | 12-24VDC |
| Wireless Communication Distance | 100 meters (unobstructed) |
| Transmitter Power Consumption | Standby current 3.2uA, maximum current 15mA during transmission, standby for about 2 years with 6F22 square battery |
| Receiver Power Consumption | Measured at the rated 12V, no-load current 4.9mA, maximum working current 34.9mA |
| Operating Temperature | -40~+85℃ |
| Humidity Requirement | ≤90%RH (non-condensing) |
| Wireless Frequency | 315MHz (civilian frequency band) |
| Transmitter Input Signal Type | Dry contact signal |
| Buzzer alarm sound | 90dB |
| Protection Level | IP67 |
| Seismic Performance | >3500g |
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