In today’s rapid development of industrial automation, speed switches, as the core component of equipment operating status monitoring, are playing an increasingly important role.
Among them, the speed switch model 11801 has become the first choice for many industries to ensure equipment safety and improve production efficiency due to its high precision, high reliability and wide applicability.
The following will provide an in-depth analysis of the unique value of speed switch 11801 from multiple dimensions.
Technical principle: double guarantee of electromagnetic induction and intelligent delay
The core technology of speed switch 11801 is based on the principle of electromagnetic induction, and achieves precise control of speed through non-contact monitoring of the motion status of the measured object.
Its working principle can be broken down into three key steps:
Pulse signal generation: When the measured object (such as the bolt head on the conveyor belt roller, gear tooth groove, etc.) rotates to the sensor detection range, the electromagnetic field inside the sensor changes and generates a pulse signal synchronized with the rotation frequency.
For example, the XSA-V11801 model has a detection distance of 4 – 6mm, which can stably capture small displacement changes.
Frequency comparison and threshold setting: The sensor compares the real-time pulse frequency with the preset threshold.
If the frequency of the measured object is lower than the set value (such as equipment jamming or slipping), the sensor output signal changes from closed to open; if the frequency is higher than the threshold (such as overspeed operation), an alarm or shutdown command is triggered.
The trip time of the RD-III-8-EXSA-V11801 model is adjustable from 0.5 to 8 seconds to adapt to different process requirements.
Intelligent delay protection: For the low-speed state during the startup stage of the equipment, the 11801 series switch has a built-in delay circuit to avoid malfunction.
For example, the CMT-11801 model has a start-up time of 10 seconds to ensure a smooth transition to normal operation.
Core advantages: Five characteristics create industry benchmarks
High-precision detection: using millimeter-level sensing technology, the error rate is less than 0.1%.
Taking XSA-V11801 as an example, its linear characteristics have excellent consistency and can accurately distinguish between normal fluctuations and fault signals to avoid false positives and negatives.
Fast response capability: The response time can be as short as 0.4 seconds (such as XSA-V11801 at 150 pulses/minute), ensuring that the circuit is cut off immediately after a fault occurs to prevent further damage to the equipment.
Wide voltage adaptability: supports 24VDC – 220VAC AC and DC universal, covering diverse needs from small motors to large transmission devices.
The RD-11801 model is also compatible with 110VAC voltage, simplifying the procurement process for multinational projects.
Strong environmental tolerance: The protection level reaches IP66 – IP67, and can operate stably in the temperature range of -20℃ to +70℃ and 90% humidity environment.
The shell of the CMT-11801 model is made of metal, which is impact-resistant, dust-proof and waterproof, and is suitable for harsh scenes such as mining and metallurgy.
Intelligent integration: Some models (such as XSA-V11801) are equipped with status indicator lights and potentiometer adjustment functions. Users can adjust the response time by rotating the potentiometer, and parameter configuration can be completed without complex programming.
Application scenarios: covering eight core industries
The applicability of speed switch 11801 spans heavy industry and light industry. The following are typical application scenarios:
Mining and metallurgy: monitor the speed of conveyor belts, elevators, and crushers to prevent slipping or overloading.
For example, in coal mine conveying systems, RD-III-8-EXSA-V11801 can detect belt breakage, transmission chain detachment and other faults in real time, with a shutdown response time of ≤2 seconds.
Electric power and chemical industry: protect the stable operation of fans and pump equipment.
The XSA-V11801 model’s high-temperature resistant design (up to 70°C) can cope with the extreme environment of chemical reactors.
Ports and Logistics: Optimizing the transmission efficiency of loading and unloading equipment.
At the automated terminal, CMT-11801 monitors the rotational speed of the screw conveyor and dynamically adjusts the material transportation rhythm, improving operating efficiency by more than 15%.
Machinery manufacturing: ensuring precise speed control of gearboxes and transmission shafts.
The push-pull output signal (Imax = ±20mA) of XSA-V11801 can be directly connected to the PLC control system to achieve closed-loop control.
Food and Textiles: Maintaining continuous operation of light equipment.
In textile machinery, the 11801 series switch prevents yarn breakage accidents and reduces downtime losses by monitoring the speed of the yarn tension wheel.
Construction and subway: monitor the operating status of concrete mixers and shield machines.
The RD-11801 model’s earthquake-proof design (5gn earthquake resistance) can adapt to the vibration environment of underground construction.
Automotive industry: test the dynamic performance of engines and transmission systems.
In the vehicle test line, the 11801 series switches provide data support for NVH optimization through high-precision speed measurement.
Aviation and shipping: ensuring the safe operation of turbines and propellers.
The XSA-V11801’s wide-temperature design (-25°C to +70°C) can handle extreme temperature changes at high altitudes or at sea.
Industry practice: from technical parameters to value implementation
Take the transformation of the blast furnace loading system of a steel company as an example: Pain point: The original system used a mechanical speed switch, and the fault detection delay was more than 5 seconds, resulting in an average of three belt tearing accidents per year, with a single loss of more than 500,000 yuan.
Solution: Replace with RD-III-8-EXSA-V11801 model, set the trip time to 3 seconds, and adjust the detection distance to 4mm.
Effect: After the transformation, the system can shut down within 0.8 seconds, the belt tear accident has been reduced to zero, and the annual maintenance cost has been reduced by 70%.
At the same time, remote monitoring and early warning can be achieved through the linkage of the status indicator light with the DCS system.
Future trend: The evolution direction of intelligence and integration
With the advancement of Industry 4.0, speed switch 11801 is being upgraded in the following directions: Wireless transmission function: Some manufacturers have developed models that support LoRa or NB-IoT, enabling real-time uploading of data to the cloud to support predictive maintenance.
AI algorithm integration: Through the built-in machine learning model, it automatically identifies the equipment operating mode, optimizes threshold settings, and reduces manual intervention.
Miniaturized design: For scenarios such as robots and AGVs, miniaturized models such as M8 and M12 are developed to save installation space.
