Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
100% Manufactory
Set up since 2012, our company own the factory, and experienced.
PROFESSIONAL MANUFACTURER OF MICRO SWITCHES
Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
Product Quality
Uiled have obtained relevant CCC, CQC, UL, VDE, CE, ENEC enterprise and relevant product certifications.
Sales Market
We have gained a global sales network reaching many countries over North America, South America, Europe, Africa and South East Asia.
After-Sales Service
A complete service network has been established to respond to user requests within 24 hours.
PRODUCTS
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
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ABOUT LEMA
Lema is committed to R&D, production and sales of industrial control electrical switches. The company's core products include micro switches and travel limit Switches, push button switches, foot switches, toggle switches, AC power socket.
After nearly 30 years of steady development, Lema has become a large-scale professional manufacturer of micro switches in China. The company currently covers an area of more than 11,000 square meters.
2000Years
Established in
40+
Exporting countries and regions
10000m2
Factory floor area
60+
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APPLICATION
Committed to research and development, production, sales of industrial electrical switches and connectors
INDUSTRIAL
AUTOMATION
Industrial automation empowers smart manufacturing with reduced manual labor, higher precision, and greater efficiency.
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How to Wire a Limit Switch to a PLC Input
To wire a mechanical limit switch to a PLC input, first read the PLC module’s input-voltage and common-terminal diagram, then identify the switch’s COM, NO and NC terminals with a meter. A dry contact does not create a voltage: it only opens or closes a path from the correct supply rail to the input. For a typical 24 V DC sinking input, the common is connected to 0 V and the limit-switch contact switches +24 V to the input. For a sourcing input, the polarity is reversed. The exact module manual—not a generic color code—decides the connection. This guide covers a standard position-indication input. A single ordinary limit switch wired to a standard PLC input is not, by itself, a safety-rated emergency-stop or guard-monitoring circuit. Use the machine risk assessment and the approved safety design for those functions. Start with the complete input circuit A PLC input reports ON only when current flows through its sensing circuit. The mechanical switch is one element in that loop. Before landing a wire, record the input module model, permitted input voltage, input type, common grouping, power-supply polarity and channel number. The terms sinking and sourcing describe the current path in a DC circuit; they are not interchangeable labels for every input. AutomationDirect’s input-module explanation shows why a contact between supply positive and the input works when the module’s common returns to supply negative. The actual PLC module wiring manual remains the authority for a particular installation. Item to verifyWhy it mattersWhere to checkRated input voltage and thresholdPrevents a false OFF indication or module damagePLC input datasheetInput common polarity and groupingDetermines the current path for every channel sharing the commonModule terminal diagramSwitch contact identityCOM–NO...
↗Micro Switch Contact Resistance: Causes, Testing and Limits
Micro switch contact resistance is the resistance through the closed contact path, measured between the relevant terminals while the actuator holds the contact closed. A higher or unstable reading can indicate contamination, poor terminal connections, contact wear, insufficient contact force or a measurement error. The correct limit is not a universal number: use the specification for the exact switch model and its stated test conditions. A continuity beep only shows that a circuit is connected; it does not prove that a low-level signal will remain reliable over many cycles. This guide separates the switch’s internal contact from cable and probe resistance, explains when a two-wire check is enough, and shows how to compare repeated measurements without inventing a pass/fail threshold. It is intended for OEM and maintenance decisions on unpowered, isolated switches—not for resistance testing on a live circuit. What the measured value actually includes With a conventional two-lead digital multimeter, the display includes the switch contact path plus the meter leads, probe-to-terminal interfaces, and any connected cable or parallel circuit. If the switch is still wired into a machine, other paths through a PLC input, indicator or suppression component can distort the result. Disconnect and isolate the device according to the machine procedure before measuring resistance. Short the meter probes together and note the baseline; a high or changing baseline means the test setup needs attention before judging the switch. A separate issue is contact bounce: brief opening and reclosing around actuation. Bounce is a time-domain behavior, not a steady-state ohms value. Likewise, an electrical life rating is a cycle-test result under specified load conditions, not a statement that every switch will fail at a particular resistance after a...
↗IEC C14 Inlet With Fuse and Switch: Wiring Guide
C14 inlet with fuse and switch wiring should be selected by matching the electrical function, mechanical interface, environment, and verification plan—not by copying a generic diagram or choosing from appearance alone. A fused, switched C14 inlet combines three functions in one assembly: equipment connection, overcurrent protection, and manual switching. Terminal layout and fuse topology vary. Protective earth must never be routed through the switch or fuse, and the finished design requires review against its schematic and applicable equipment standard. This guide gives engineers and OEM buyers a practical way to define the requirement, compare samples, and avoid a part that works on the bench but fails after installation. Application-focused view using the matching LEMA product. What the term means in this application A fused, switched C14 inlet combines three functions in one assembly: equipment connection, overcurrent protection, and manual switching. Terminal layout and fuse topology vary. Protective earth must never be routed through the switch or fuse, and the finished design requires review against its schematic and applicable equipment standard. The first job is to separate the switch's name from its required behavior. Product names are often shortened for search or purchasing, while an engineering drawing defines the contact state, terminal numbering, operating point, allowable travel, mounting reference, and ratings. If those details are missing, two parts with similar names may behave differently. Write the control requirement as a short sequence: the condition before actuation, the physical action that causes actuation, the electrical state after actuation, and the condition that resets it. This sequence prevents confusion between mechanical action and contact logic. It also gives the controls engineer, mechanical designer, buyer, and supplier one shared description to review. Do not...
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