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Intelect® Mobile Stim and Combo Therapy Systems
2.1 OVERVIEW
The Intelect Mobile Therapy Systems are comprised of several PC board assemblies housed within a common
enclosure. These assemblies each support a distinct function in the product. The basic elements are User
Interface, Control Board, Stim Boards, Ultrasound Board (Combo only), Ultrasound Applicator (Combo only),
and Power Supply Circuits.
2.2 POWER SUPPLY CIRCUIT
A universal 75 Watt input power supply provides each system with the required 24 volts DC. The supply is
connected to the mains at all times when the Mains Power Cord is attached and plugged into an outlet
supplying 100 - 240 VAC. The 24 V supply is regulated locally at each PC board as required.
2.3 CONTROL BOARD
The Control Board serves just as its name implies. It controls the operation of the Stim Boards, Ultrasound
Board, User Interface, and Accessories. The Control Board communicates to the Stim Boards and Ultrasound
Board through a proprietary bus. The Control Board drives the display. The Control Board reads the menu
buttons. The Control Board also reads the amplitude and the Contrast Control on the systems. Sound output
is generated by the Control Board and routed to an internal speaker.
2.4 STIM BOARDS
The Stim Boards create all muscle stimulation output. Communication to the Stim Boards is via a
proprietary bus. A Processor on each Stim Board acts on messages passed to it by the Control Board
to set up waveforms and adjust output amplitude. Information can likewise be passed from each
Stim Board back to the Control Board for monitoring current, etc. If a Stim Board does not respond as
expected to a command from the Control Board, output is stopped and an Error Message is generated.
2.5 ULTRASOUND BOARD AND APPLICATOR COMBINATION SYSTEMS ONLY
The Ultrasound Board generates the 1 or 3.3 MHz output to drive the Sound Head of the Applicator. The
Ultrasound Board is accessed through the proprietary bus by the Control Board. It can provide current
and voltage information about the ultrasound output of the board. The calibration data for the Sound Head
is passed through the Ultrasound Board from the Applicator to the Control Board. By storing the calibration
data in the Applicator, there is no calibration necessary for the Ultrasound Board and any
calibrated Chattanooga Group Intelect Advanced or Intelect Mobile Ultrasound Applicator can be connected
and operated to provide accurate coupling and output.
2.6 USER INTERFACE AND ACCESSORIES
The LCD display panel provides the operator visible feedback in the way of menu choices. Pressing the
User Interface buttons makes selections from the menus. The Control Board interprets these user inputs and
responds accordingly. Audible feedback is given for such events as key presses and end of treatment.
2.7 NIMH BATTERY
The NiMH Battery Module incorporates a Nickel Metal Hydride (NiMH) Battery Pack and a PC Board. The
PC Board monitors the Battery Charge Level. The Battery Pack supplies the required 24 VDC to the system
which is then distributed to the respective PCB’s through the Universal Power Supply. The Battery
Pack is interfaced with the system via a Wire Harness that facilitates communication with the Control
Board and delivery of power to an Electrotherapy or Combination Therapy System. When the Therapy
System is connected to a Mains Power Supply via the Mains Power Cord, the NiMH Battery Pack will charge.
Once the Battery Pack is fully charged, the software will stop the charging process, eliminating the possibility
of overcharging. Battery power is used only when the Therapy System is not connected to a Mains Power
Supply.
2 THEORY OF OPERATION
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