High Inrush Currents in Lighting Technology
TURCK 9/11/2018
Lighting technology has been changing for some years now. Traditional light bulbs are rapidly being re- placed with energy-efficient light sources such as fluorescent lamps and LEDs. All of these lamps have one thing in common: they require electronic control gear (ECG). The contacts on conventional relays wear out very quickly if used for triggering these devices.
While "normal" relays are monostable, i.e. they return to the idle state when the excitation is switched off, remanence relays are bistable, i.e. the current switching state is retained irrespective of the excitation. Relays of this type are available in different versions.
In combination with I/O sockets and the plug-in jumpers, the IRC relay series permits low-cost, clearly arranged and reliable realisation of interface circuits for the input and output ends of PLC and control systems.
The modular monitoring system consists of individual plug-in monitoring modules with front cover, an 11-pole plug-in relay and a system socket with retaining spring. The individual combination allows an optimal device selection for the foreseen application.
Tungsten contacts have a higher melting point that help resist high power peaks and protect main contacts. High power peaks during switch-on of electrical loads, for example when switching power supplies and ballasts can lead to welding of the contacts. Early make tungsten contacts resist high inrush currents and avoid contact welding.
The modular timer system consists of individual plug-in timer modules with front cover, an 11-pole plug-in relay and a system socket with retaining spring. The individual combination allows an optimal device selection for the foreseen application.
Turck announces the uprox3 series of sensors, which offers the longest sensing ranges of all Factor 1 sensors on the market. The increased performance is due to the latest chip set and manufacturing technologies.
Turck announces the uprox3 series of sensors, which offers the largest switching distances of all Factor 1 sensors on the market thanks to an electronic platform that uses the latest chip set and manufacturing technologies.
FOUNDATION fieldbus is unique among the popular open industrial networks in that it uses a true distributed control structure. I/O devices in the field communicate process variable and feedback information directly to each other and contain the necessary function blocks for the control scheme to operate.
Turck has added the IMX12-FI frequency transducer to its range of IMX interface devices. Users can not only use the devices as rotational speed monitors but also as pulse counters. In both modes, the single-channel and two-channel variants can transfer input frequencies of up to 20,000 Hz.
Turck's TBEN-LG-EN1 spanner is a block I/O module that enables communication between two different Ethernet networks directly in the field. The robust module with protection to IP65/IP67/IP69K features a glass fiber reinforced housing and fully potted module electronics.
Turck is completing its offering of multiple passive junctions with M8 connector variants. The fully encapsulated TB-4M8 and TB-8M8 comply with IP67 protection requirements and are ideal for applications with space restrictions. The fastening holes in the front and at the sides enable the customer to fit the junctions flexibly and suitably for the particular mounting requirement.
The operating distance (S) of the different models is basically a function of the diameter of the sensing coil. Maximum operating distance is achieved with the use of a standard or larger target. Rated operating distance (Sn) for each model is given in the manual. When using a proximity sensor the target should be within the assured range (Sa).
When a metal object enters the high-frequency field, eddy currents are induced on the surface of the target. This results in a loss of energy in the oscillator circuit and, consequently, a smaller amplitude of oscillation. The detector circuit recognizes a specific change in amplitude and generates a signal which will turn the solid-state output "ON" or "OFF".
Whenever wire is used to transmit electrical data, it is possible for the wire to absorb external noise, possibly changing the characteristics of the electrical signal, or to give off noise that could cause changes in other electrical components that are near. Shielding is the act of placing conductive material between the potential noise emitters and receivers.
The IM72 solenoid drivers are uniquely designed devices that allow them to drive the vast majority of "IS" solenoids available in today's marketplace with a single type of interface device. Gone are the days when a wide variety of isolators were needed to drive specific solenoids with specific requirements.
