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
