ZXD-ARotational speed signal observation meter
1.Outline
ZXDThe rotational speed signal observation meter may complete hydraulic turbine power set the rotational speed percentage or the frequency measurement, its input signal may take the main engine remnant voltage (nearby current transformer), permanent magnetism machine voltage, the output uses seven group black-white controls and a group 12 D/A transformation output simulation quantity. Unit's rotational speed percentage and the frequency demonstrated by four LED nixietubes that seven group relay's active statuses instructed separately by seven LED light emitter diode. This measuring appliance besides may bring 4-20mA, 1-5V, 0-20mA, standard cocurrent signal outputs and so on 0-5V, but may also bring RS-485, RS-232C, RS-422A and so on standard serial port output, the output uses the electro-optical isolation, causes the measuring appliance to be possible with the computer direct connection
This measuring appliance essential primary device uses American ATMEL Corporation, MAXIM Corporation, the TI Corporation's product. The measuring appliance power failure uses the E2PROM data protection, because initial establishment's all parameters and the active status will not cut power suddenly lose, but permanent preservation; The input, the output use the electro-optical isolation technology, causes the measuring appliance to satisfy the power plant safely completely, prompt, stable, the reliable work requirement
2.Major technique parameter
2.1 Input signal :
2.2 Generator remnant pressure ;2)Generator PT frequency
2.3 Input voltage scope :Generator remnant pressure or PT signal 0.3-250VAC
2.4 Measuring accuracy:0.1 level
2.5 Frequency measurement scope: Frequency 0.02 - 99.99 HZ, rotational speed percentage 2%-200%
2.6 output signal
2.6.1.group relay normally opened contact output
2.6.2.simulated signal output: 4-20mA (corresponds to unit rotational speed 0%-200%)
2.6.3 RS485 serial communication connection output: Standard MODBUS communication protocol
2.7. Working conditions: Temperature - 10-50 ºC, relative humidity ≤85% non-corrosiveness gas and electric conduction, explosive, places and so on dust.
2.8. Outlook size: Wide * high * deep = 160 ×80×160 mm
2.9.Power source: The switching power supply, exchanges 185--250V or directs current 75--300V
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