Miya(manager)
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IS200VSPAH1A
Functional Description
The IS200RAPA Rack Power Supply Board (RAPA) accepts a 48 V, 25 kHz square wave input and provides the following:
• The dc control voltages required by other boards in the Innovation SeriesTM board rack (through the P1 connector).
• The "Power ON" and "Master RESET" functions for the control. Two LED indicators and four testpoints provide diagnostic information on the board (one protective fuse is also provided). The RAPA board is mounted in the Innovation Series board rack. The RAPA board also includes a parallel-style bus host processor. All standard bus signals are interfaced through the P1 connector. There are two functional revisions of the RAPA board currently in service, the IS200RAPAG1A_ _ and the IS200RAPAG1B_ _. There are minor differences in the output and reference voltage tolerances between them.
Reset Function The PSEN line on the P1 connector provides a logic supply under Voltage RESET protection and Master
RESET functions.
• At Power Up, the PSEN line will be low for 100 milliseconds after the input to the 5 V dc regulator is above 9 V dc and the 5 V dc is above 4.6 V dc.
At Power Down (or a power dip), the PSEN line will be asserted low when the 5 V dc regulator input drops below 9 V dc. The Master RESET button (located on the RAPA board’s front panel) will pull PSEN low when the button is depressed and PSEN will remain low for 100 milliseconds after the release of the RESET button. Pulling PSEN low from an external board for a minimum of 30 microseconds will force a RESET and PSEN will remain low for a minimum of 100 milliseconds or until the PSEN line is released.
Serial Board Identification A serial 1024-bit memory device is present on the board. This memory is programmed with board identification and revision information. Access to the information is through a single data line, BRDID, on the P1 connector.
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Miya(manager)
Email:miya@mvme.cn
Skype:miyazheng520
QQ :2851195450
Tel:0592-5087576
86-18020776792
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