LUCAS
®
3 Chest Compression System – Service Manual
3328798-002, ©2017 Physio-Control, Inc.
Page 11 of 91
Electronics Block Diagram
LUCAS is driven by a rechargeable Lithium Ion Polymer (LiPo) Battery. The Battery can be charged during operation
by an external Power Supply, connected to a wall outlet, or with a Car Power Cable. You can also remove the Battery
from LUCAS and recharge it in a separately sold Battery Charger of desktop model.
NOTE: The Battery must be connected even when the device is supplied by the power supply.
The Battery is mechanically keyed in LUCAS and in the Battery Charger to make sure you get the correct installation.
The top of the Battery has connections for power and communication to the Battery Charger and to LUCAS.
The Battery has built in intelligence to monitor the number of usage cycles and battery age to tell the user when to
replace the Battery. It also monitors the internal temperature of the Battery.
The Battery supplies the electronics and the electrical Motor. The Motor is connected to the linear unit via a drive belt.
The electronics is divided in four parts but situated on three separate PCB’s:
1. The Control System that controls the motor with information from the user interface and from the rotation and
linear sensors.
2. The Communication System that sends data wirelessly via Bluetooth and WiFi to/from computer.
3. The Protective System that controls inputs and outputs and shut off in case of a problem. The internal Battery
Charger that controls the charging sequence of the Battery.
There are two separate linear measuring sensors that monitor the movement of the Suction Cup:
1. Linear sensor 1 is for the Control System,
2. Linear sensor 2 works as a reference to the Protective System.
An electrical fan is situated at the bottom of the device for cooling the electrical motor and other electronics, the fan
starts when the internal temperature reaches 40°C and stops when the temperature is below 30°C
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