详细说明 标准信号 双通道 回路电源 隔离器 IsoTrans® A 20400 knick

IsoTrans® A 20400 For isolation of 0(4) ... 20 mA standard signals, 1 or 2 channels   Product description   Image Typical applications   Facts   Product Line   Dimension drawings   Schematic diagram   Specifications   Transfer Function   Downloads

The Task Guaranteeing reliable and safe system operation requires galvanic isolation between the sensor and controller (for example DCS, PLC, etc.). A low-cost solution is provided by loop-powered isolators for standard signals because they do not require power supply units and wiring. The Problems are often, particularly in large plants, the lack of space for mounting the isolators and the increasing operating temperatures in distributors and enclosures. Despite cost pressure a sufficient galvanic isolation shall be guaranteed. The Solution that accounts for effectiveness as well as efficiency is found in the 6-mm class from Knick: The IsoTrans® A 20400 loop-powered isolator offers one or two channels in a 6-mm housing. An extremely high component density of 320 channels per meter of top hat rail and excellent technical properties, for example, protective separation or elimination of feedback through a Load-Stop function, make the isolators unbeatable. The cost/performance ratio is excellent. The Housing The new modern modular housing with a width of only 6 mm for 1 or 2 channels allows simple and quick assembly due to its sophisticated geometry. The Function Principle The IsoTrans® A 20400 obtains its power directly from the measuring signal as a voltage drop without falsifying it. There are no costs for a power supply and wiring. The IsoTrans® A 20400 more or less has no self-heating that would cause the electronic components to age faster. Together with a patented circuit technology, this means maximum reliability. Due to this long service life, we give a 5-year warranty. The Technology A transmission error of just 0.1 %, excellent square-wave response and very low residual ripple guarantee perfect signal transmission. The low intrinsic voltage drop of approx. 1.7 V presents just a slight signal load. The high test voltage up to 2.5 kV and protective separation in accordance with EN 61140 up to 300 V protect operating personnel against the mains voltage, for example. Interference-Free Functionality Now Knick has considerably expanded the application possibilities of passive isolators by implementing a Bürdenstop® (load stop) function. Here, the current supplied at the primary side is maintained independently from the output load. Thus, for the first time any excessive load increase at the output, such as caused by line breakage or inconstant loads including complex impedances, can be compensated for.

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Facts

Extremely compact design up to 320 channels per meter 1 and 2-channel versions cheap and flexible for a wide range of applications Galvanic isolation between input and output protection against incorrect measurements or damage to the measuring system due to parasitic voltages Protective separation up to 300 V AC/DC according to EN 61140 for protection of persons and equipment Load stop eliminates feedback e.g. in case of cable break in the output loop No power supply required cost savings due to lower wiring requirement, no mains influences, no unnecessary heating and therefore maximum service life of components High accuracy no falsification of measuring signal Maximum reliability no repair and failure costs International use UL / CSA approvals 5-year warranty

Product Line   Devices   Order no. IsoTrans® A 20400 1-channel, P0 modular housing (width: 6mm) A 20401 P0   2-channel, P0 modular housing (width: 6mm) A 20402 P0   1-channel, P0 modular housing (width: 6mm), with Load-Stop function A 20411 P0   2-channel, P0 modular housing (width: 6mm), with Load-Stop function A 20412 P0 Powre supply None, supply from input signal