ZOLL R Series Monitor Defibrillator Rev J - Manual (Page 156)

R Series Service Manual
5-4 9650-0903-01 Rev. J
Pace/Defib Core Engine
The R Series P/D Core Engine is an independent module with its own controller. It generates pace and defib therapeutic energies when supplied with
appropriate high power (10 - 15A @ 10V min - 18V max), low power (+12, +5, +3.3, -5), serial communication commands, and digital signals. Direct
digital signals are provided to reduce timing delays on critical signals - an example is the SYNC signal used to synchronize the defibrillator pulse.
The module generates a rectilinear biphasic waveform, similar to that of the ZOLL M Series unit. The waveform is flatter, however, and, at high patient
impedances, delivers higher current than the M Series. To accomplish this, the capacitor was changed from 115 uF @2300V to 100 uF @2800V. The defib
pulse is generated from an SCR bridge, and shaped by a 6-element DAC. The module also contains pace generation circuits employing a tightly controlled
current source, isolated from the patient by a transformer, and a relay. This provides more accurate control of the pace current, and better isolation of the
ECG from the defib charging circuit.
Front Panel Controls
The main rotary switch (full selection includes pace, off, monitor and defib modes) and pace encoders (amplitude and rate) are located on the front panel
and connect to the controls board. The controls circuit also includes the following:
• Front panel switches: energy select, charge, shock, analyze, lead, size, alarm suspend, recorder, 4:1, 6 softkeys and NIBP.
• Shock switch LEDs.
• AC on and battery charge indicators.
• Readiness indicator (green check or red X).
• Front panel type identification.
• LED backlighting to distinguish basic life support (AED) mode from advanced life support (manual) mode.
Peripherals
R Series peripherals include the following:
• Color TFT LCD with 640 X 480 resolution.
• Printer (M Series legacy).
• Speaker (M Series legacy).
• Beeper (M Series legacy).
• USB for data communication.
• Compact Flash for software loading and WiFi option.