Erbe EIP 2, Service Manual

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6 • Circuit Descriptions
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Microcontroller
The Type PIC18F258 microcontroller handles several tasks:
• Evaluation of current and voltage measurements of motor monitoring
• Adjustment of motor control to the current and voltage levels via a
PWM signal
• Checking of any activations by pushbutton or footswitch
• Updating of display on the control panel
• Communication via a CAN interface with the VIO electrosurgical unit
(only on units with ECB socket, ECB = Erbe Communication Bus).
CAN module (optional)
The CAN module enables communication between EIP 2 and the VIO elec-
trosurgical unit.
Footswitch
The pump can be activated with the EIP 2 footswitch.
Control panel
The control panel makes it possible for the user to perform settings on the
EIP 2.
Three so-called quick activation buttons enable direct adjustment of the
setting, which is otherwise performed using the Up and Down buttons. The
pump can be started with the activation button.
The display section on the control panel is comprised of three 7-segment
displays, which are updated constantly by the microcontroller.
Motor
The motor is a DC motor with a nominal voltage of 24 V and a nominal cur-
rent of 1.1 A.
The motor has a flanged gear unit, via which the pump head is driven.