ZoeLLNER electrical components Germany ZoeLLNER model ZoeLLNER price

ZoeLLNER electrical component is a current-limiting element. After connecting the resistor in the circuit, the resistance value is fixed, generally with two pins, and it can limit the current magnitude through the branch to which it is connected. A resistor whose resistance value cannot be changed is called a fixed resistor. A resistor whose resistance value can be changed is called a potentiometer or variable resistor. An ideal resistor is linear, meaning the instantaneous current through the resistor is directly proportional to the applied instantaneous voltage. Variable resistors used for voltage division. One or two movable metal contacts are pressed tightly against the exposed resistive body. The contact position determines the resistance between either end of the resistive body and the contact. The terminal voltage and current have a definite functional relationship. It is a two-terminal device that embodies the ability to convert electrical energy into other forms, represented by the letter R, with the unit ohm Ω. Actual devices such as light bulbs, heating wires, and resistors can all be represented as resistor elements. The resistance value of a resistive element is generally related to temperature, material, length, and cross-sectional area. The physical quantity measuring the extent to which resistance is affected by temperature is the temperature coefficient, defined as the percentage change in resistance value when the temperature increases by 1 ℃. The main physical characteristic of a resistor is converting electrical energy into thermal energy; it can also be described as a dissipative element, generating internal energy when current passes through it. Resistors typically serve voltage division and current shunting functions in circuits. For signals, both AC and DC signals can pass through resistors.

ZoeLLNER electrical component performance

1. Protection characteristics: When the surge strength from the surge source does not exceed the specified value, the clamping voltage of the varistor must not exceed the surge withstand voltage that the protected object can endure. 2. Surge withstand characteristics: The varistor itself should be able to withstand the specified surge current, surge energy, and average power during successive surges. 3. Life characteristics include two aspects: one is continuous operating voltage life, meaning the varistor should reliably operate for a specified time (in hours) under specified ambient temperature and system voltage conditions; the other is surge life, meaning it can reliably withstand a specified number of surges. 8. After the varistor is integrated into the system, in addition to its "safety valve" protection role, it introduces some additional impacts, known as "secondary effects," which should not degrade the normal operating performance of the system. The main factors to consider at this stage are three: first, the inherent capacitance of the varistor; second, the leakage current under system voltage; and third, the impact on other circuits caused by the coupling of the varistor's nonlinear current through the source impedance.

ZoeLLNER electrical component characteristics

Sensitivity refers to the ratio of the change in output to the change in input under steady-state operating conditions of a sensor. It is the slope of the output-input characteristic curve. If the sensor exhibits a linear relationship between output and input, then sensitivity S is a constant. Otherwise, it will vary with changes in the input. The dimension of sensitivity is the ratio of the dimensions of the output and input quantities. When the dimensions of the sensor's output and input quantities are the same, sensitivity can be understood as the amplification factor. Increasing sensitivity yields higher measurement precision. However, the higher the sensitivity, the narrower the measurement range, and stability often deteriorates.

ZoeLLNER electrical component function

Photoelectric switches can be used in various application scenarios. Avoid strong light sources. Photoelectric switches generally operate stably under high ambient illumination. However, avoid aligning the sensor's optical axis directly with strong light sources such as sunlight or incandescent lamps. When the angle between the sensor (receiver) optical axis and the strong light source cannot be changed, install shading plates around the top of the sensor or fit a long shading tube. Prevent mutual interference. New photoelectric switches usually have automatic mutual interference prevention functions, so mutual interference is generally not a concern. However, for HGK series through-beam infrared photoelectric switches installed close together in several groups, prevent interference between adjacent groups and mutual interference. The most effective way to prevent this interference is to arrange the emitters and receivers in a cross pattern; when there are more than 4 groups, increase the spacing between groups. Of course, using models with different operating frequencies is also a good approach. For retroreflective photoelectric switches, an effective method to prevent mutual interference is to increase the spacing. Moreover, the greater the detection distance, the larger the spacing should be; the specific spacing should be determined based on debugging conditions. Naturally, using models with different operating frequencies is also an option. Influence of mirror angle: When the detected object is glossy or encounters a smooth metal surface, the reflectivity is generally very high, acting almost like a mirror. Adjust the installation so that the optical axis is not perpendicular to the detected object, thereby preventing malfunction. Eliminating background influence: When using retroreflective diffuse-type emitters and receivers, unstable detection may occur if the detected object is close to the background, or if the photoelectric switch or background is a smooth object with high reflectivity. Therefore, you can switch to distance-limited emitters and receivers, or adopt methods such as moving away from the background, removing the background, painting the background matte black, or making the background rough and dull to eliminate the issue. Use of self-diagnostic function: During installation or use, minor deviations in the optical axis, lens contamination, dust accumulation, external noise, or ambient temperature exceeding the range may occur due to table or background influences and vibration. These issues may cause the photoelectric switch to deviate from its stable operating zone. In such cases, utilize the photoelectric switch's self-diagnostic function to trigger the green stability indicator light, alerting the user to make timely adjustments.

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