Assemblies Descriptions B: Theory of Operation
189
Assemblies Descriptions
The electrical core of Efficia DFM100 consists of custom-designed Processor and Therapy PCAs and
several smaller PCAs such as the Printer PCA, Battery PCA, and UI PCA. The Processor PCA includes
the System-on-Module (SOM) PCA. These PCAs functions are described below.
The Efficia DFM100 assemblies are completely lead-free.
This section is organized into the following sections:
Processor PCA . . . . . . . . . . . . . . . . . . p. 189
Therapy PCA . . . . . . . . . . . . . . . . . . p. 190
Power and Battery . . . . . . . . . . . . . . . . . p. 191
Display Assembly . . . . . . . . . . . . . . . . . p. 192
Indicators . . . . . . . . . . . . . . . . . . . p. 192
Controls . . . . . . . . . . . . . . . . . . . p. 192
Clock Backup Battery . . . . . . . . . . . . . . . . p. 193
NBP Module . . . . . . . . . . . . . . . . . . p. 194
SpO
2
PCA . . . . . . . . . . . . . . . . . . . p. 194
Processor PCA
The Processor PCA, together with the SOM PCA, is the “brain” of the device. It provides all the general
purpose computer resources needed for the overall functionality of the device including memory, human
interface control, external communication ports, and interfaces to all the supporting modules and
circuits not directly related to the therapy functions (Battery, AC Power, Defibrillation, Pacing, and Pads
ECG.)
The Processor PCA performs the following functions:
• Overall system control.
• High-level control of all modules and subsystems.
• Control of power up and power down sequences.
• All user interface functions, including:
– Generation and control of tones and audio prompts and detecting of front panel button presses.
– Generation and formatting of information for the display and printer.
– Control of indicator LEDs for Shock button backlight and External Power.
– Alarm generation when the limits are violated.
• Exchange information via the USB port.
• Supervision of defibrillation functions on the Therapy PCA, including:
– Initiating a capacitor charge sequence.
– Secondary monitoring of capacitor voltage.
– Initiating a shock delivery sequence.
– Controlling therapy isolation and internal paddles relays.
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