An optocoupler is a component consisting of a photodiode(LED) and an electrically isolated phototransistor. It is used for signal transmission and is often used for galvanic isolation in the control circuit of power supply units. (For more see Wikipedia)
PELV (English for “Protective Extra Low Voltage” – formerly also known as safety extra-low voltage; see also SELV) describes a voltage that is set so low(extra-low voltage) that there is no danger from body currents in the event of indirect contact or direct contact that does not cover a large area. If insulation fails, there […]
PoE ( Power over Ethernet) supplies network-compatible devices with power via the eight-wire Ethernet cable. The biggest advantage of a PoE solution is that a power cable can be saved. This means that Ethernet-connected devices can also be installed in hard-to-reach or cramped applications. With PoE-capable devices, a distinction is made between PSE devices (Power […]
Polarized light that only oscillates in a single direction transverse to its direction of propagation. Principle of polarization of light (source: Vision Doctor). Polarized light can be used to avoid reflections (especially with ring lighting) and to visualize structures in transparent objects. When a surface is illuminated with polarized incident light, all rays reflected by […]
Filter (glass plate or foil) from which almost completely linearly polarized light emerges. Polarization filters can be used to avoid reflections. This is usually a rotatable lens filter that suppresses light reflections and ensures a richer color rendition. Disturbing reflections from glass panes, liquid surfaces, shiny metallic materials or smooth, reflective plastic surfaces can thus […]
As with polarized incident light, polarization filters can also be used for backlighting. This can improve the contrast of transparent parts and even make surface tensions visible. For this purpose, a polarization filter is applied to the light plate and a second polarization filter is placed in front of the camera. Depending on the angle […]
IEC/EN 61140 classifies electrical equipment with regard to safety against dangerous body currents and electric shock. The design features of devices are assigned to the following protection classes: – Protection class 0: No protection. Such devices are not permitted in the European Union. – Protection class I: Device with protective conductor connection and basic insulation […]
