تصریح
تکنیکی معیار
IS200TBCIH1B is a GE Mark VI Speedtronic series printed circuit board assembly used as a contact terminal board, mainly used in the GE Speedtronic Mark VI series to provide high-speed network input/output for simplex, duplex and triple redundant systems, and to connect to external input/output devices.
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IS200TBCIH1B |
| IS200TBCIH1BBC | |
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30*20*6cm |
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0.35kg |
IS200TBCIH1B uses multi-layer printed circuit boards, surface mount components and connectors, which have high reliability. Some terminal blocks use removable connectors for easy maintenance and replacement.
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IS200VCCC or VCRC
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TBCIH1A
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125 V dc nominal, replace with H1C
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TBCIH1B
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125 V dc nominal, replace with H1C
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TBCIH1C
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125 V dc nominal
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TBCIH2B
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24 V dc nominal, replace with H2C
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TBCIH2C
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24 V dc nominal
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TBCIH3C
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48 V dc nominal
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Filters reduce high-frequency noise and suppress surge on each input near the point of signal entry. The dry contact inputs on H1 are powered from a floating 125 V dc (100-145V dc) supply from the turbine control. The 125 V dc bus is current limited in the power distribution module prior to feeding each contact input. H2 and H3 versions use lower voltages.
The discrete input voltage signals pass to the VCCC/VCRC board, which sends them through optical isolators providing group isolation and transfers the signals to the Mark VI controller. The reference voltage in the isolation circuits sets a transition threshold that is equal to 50% of the applied floating power supply voltage. The tracking is clamped to go no less than 13% of the nominal rated supply voltage to force all contacts to indicate open when voltage dips below this level.
A pair of terminal points is provided for each input, with one point (screw) providing the positive dc source and the second point providing the return (input) to the board. The current loading is 2.5 mA per point for the first 21 inputs on each terminal board. The last three have a 10 mA load to support interface with remote solid-state output electronics.Contact input circuitry is designed for NEMA Class G creepage and clearance.
