GE IS200EDCFG1ADC Exciter DC Feedback Board

IS200EDCFG1ADC Exciter DC Feedback Board

The IS200EDCFG1ADC Exciter Dc Feedback Board (EDCF) is used in the EX2100 Excitation Control. It measures field current and field voltage at the SCR bridge, and interfaces to the EISB board in the control panel over a high-speed fiber-optic link. The fiber-optics provides voltage isolation between the two boards, and high noise immunity. Two fibers are used, one for each signal. There are two types of fibers which can be used for different distances, as follows:

• Plastic type fiber for distances up to 10 m 

• Hard clad silica type for distances up to 90 m

Refer to the following figure for a circuit block diagram.

Features

Field Voltage Feedback: The field voltage is measured across the negative terminal of the bridge and the positive terminal of the current shunt. After scaling the voltage with the jumpered resistors, the signals are input into a differential amplifier, which controls the voltage controlled oscillator (VCO).

Field Current Feedback: The field current is measured across a dc shunt at the SCR bridge. This generates a low level signal, with a maximum value of 500 mV, which is input to a differential amplifier. The output voltage from the amplifier ranges from –5 V to +5 V into a voltage controlled oscillator.

Power Supply: Power is supplied to EDCF from an external ±24 V dc source. From this, three voltage regulators produce +15 V dc, -15 V dc, and + 5 V dc. The PSOK green LED is driven by the ±15 V dc output voltages.

Technical Specifications

Warranty :    We offer one year warranty for all original new product.

Delivery   :     We will choose the DHL/FEDEX/TNT/UPS.   

Payment   :    100% advance payment bank wire transfer.

Returns   :    Quality problems can be replaced within 15 working days from the date of receipt of the product,  repair services can be provided within 1 year.

Please contact us to get the product manual.

  One year warranty on sold items

   Available for dispatch immediately

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