Valleylab CUSA EXcel-8 - Audible Alert and Operation Indicator; Dual 24 V Power Supply Board; Power and Other Signal Connections; Ultrasonics Board-Other Circuits

Ultrasonics Board-Other Circuits
Ultrasonics Board-Other Circuits
Audible Alert and Operation Indicator
A user adjustable tone indicates operation. U17A detects the presence of a
signal and asserts the signal SPKR1. SPKR1 signal enables a piezo buzzer
driver circuit that has a volume adjustment RV1. Alert tones override the
operation indication in volume via SPKR2 signal, driven by the Machine
Control board.
Valve Drivers
Pulse and hold circuits driven by the Machine Control board control the
suction, syphon, and tissue release valves. U6, U3, and U19 provide drive
current sinks. Resistor combinations determine the pulse and hold
currents.
Power and Other Signal Connections
The +24 VAMP power supply provides circuit power for the Ultrasonics
board. Sub-regulators U27 and U8 condition the power for the +15 VUSB
and +5 VUS.
The +24VX power supply also provides power to the valves, cooling fans,
and pumps.
Cooling sensor, footswitch, suction pump level, irrigation pump level, and
cooling
pump level signals all pass from the Machine Control board to
their respective devices by way of connectors on this board.
Dual 24 V Power Supply Board
The CUSA EXcel uses an OEM medical grade 600 watt power supply with
an input voltage range of 88 to 264 VAC. The supply has two individually
regulated 24 VDC, 12 amp outputs. This power supply is an enhanced
leakage current version with earth leakage of less than 150 A. This supply
is a UL recognized component for Canada and the U.S. and is CE labeled.
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CUSA
Excel-8
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