ZOLL Propaq MD Rev A - Manual (Page 94)

C HAPTER 5 F UNCTIONAL D ESCRIPTION
90 9650-0807-01 Rev. A
End tidal CO
2
(CO
2
)
Propaq MD supports an Oridion
®
Microstream
®
CO
2
module. The CO
2
module mounts to the
Monitor board and communicates to the board through a cable connected to J50. Serial
communications from the monitor board is implemented via a UART on the PP. The CO
2
module obtains gas samples from the sampling lines through tubing and a 3-wire cable
connected to the left side panel.
Thermometry
Propaq MD supports two simultaneous temperature measurements. YSI400/YSI700 series
probes are used to make temperature measurements. Data is communicated to the PP from the
Temperature ADC via and isolated SPI bus through the FPGA. The Temperature probes
connect to the monitor board through the IBP/Temp wire harness which connects to J33 of the
Monitor board.
Power Circuitry, Battery Charger, DC-DC converters
Power circuitry for all subsystems but the defibrillator-pacer module reside on the Monitor
Board. Auxiliary Power and Battery Power are automatically switched to provide constant
current, the unit draws current from auxiliary power when present. There is a smart battery
charging circuit that will charge the battery when Auxiliary power is present. Switching mode
DC-DC converters are utilized to make internal 6V, 5V, 3.3V, 1.8V and processor core voltages.
Regulators are used to provide regulated supply voltages with low dropout for low current
consumption circuits. Each of the isolated modules, Temp/IBP, ECG, SpO2 have independent
power supplies. Isolated power supplies are designed for isolating Patient Applied Parts. The
MP via the FPGA GPIO has the ability to shut down voltage rails or power to individual patient
parameters. Power from the battery connects to the Monitor board through J29. Auxiliary
power connects to the Monitor board through J31.
USB Host Port
Propaq MD Monitor Board incorporates one USB Host ver 1.1 port. The port uses the USB
controller built into the PXA270 Main processor. Full speed of 12 Mbps and Low speed
1.5Mbps are supported. The Host port supports a USB flash memory stick for data export. The
USB host connector is in the right side panel and connects to the Monitor board through J44.
Defibrillator Pacer Module
The Defibrillator/Pacer Module consists of two PCB assemblies connected by a flex cable. This
Defibrillator/Pacer module relies on proven core defibrillation/pacing technology for improved
power conversion efficiency, reduced EMI, and improved stability in volume production. This
module contains power supplies, charging and discharge circuitry, pacing circuitry, and the
Pads/Paddles ECG preamplifier and impedance circuitry. Communication with the
Defibrillator/Pacer module is a function of the PP. The ECG-Charger board contains the
charger circuit, ECG acquisition circuitry, and protection components. The
Processor-Bridge-Pacer board contains the micro controller, CPLD, Pacer, and defibrillation
shock delivery circuit.