Bovie AARON 2250, Service Manual, Page: 44 / 106

4-6 Aaron Medical
RQEST_SENSE_FOOT_
BIPOLAR
This is an input signal from the bipolar footswitch sense circuit. This signal is generated
by a colpitts oscillator located on the display board and an isolation transformer located on
the main board. When an activation request is made, the output for this circuit becomes a
logic 1 (3.3 volts) signal.
RQEST_SENSE_FOOT_COAG
This is an input signal from the coag monopolar footswitch sense circuit. This signal is
generated by a colpitts oscillator located on the display board and an isolation transformer
located on the main board. When an activation request is made via the coag pedal on the
monopolar footswitch, the output for this circuit becomes a logic 1 (3.3 volts) signal.
RQEST_SENSE_FOOT_CUT
This is an input signal from the cut monopolar footswitch sense circuit. This signal is
generated by a colpitts oscillator located on the display board and an isolation transformer
located on the main board. When an activation request is made via the cut pedal on the
monopolar footswitch, the output for this circuit becomes a logic 1 (3.3 volts) signal.
RQEST_SENSE_HAND_COAG
This is an input signal from the coag monopolar hand sense circuit. This signal is
generated by a colpitts oscillator located on the display board and an isolation transformer
located on the main board. When an activation request is made via the coag button on
the monopolar handpiece, the output for this circuit becomes a logic 1 (3.3 volts) signal.
RQEST_SENSE_HAND_CUT
This is an input signal from the cut monopolar hand sense circuit. This signal is
generated by a colpitts oscillator located on the display board and an isolation transformer
located on the main board. When an activation request is made via the cut button on the
monopolar handpiece, the output for this circuit becomes a logic 1 (3.3 volts) signal.
FOOT_BIPOLAR _CONTACT
This is an input signal from the bipolar foot contact sense circuit. This signal is generated
by a colpitts oscillator located on the display board and an isolation transformer located on
the main board. When a bipolar footswitch is connected to the rear of the unit, the output
for this circuit becomes a logic 1 (3.3 volts) signal.
FOOT_MONO_CONTACT
This is an input signal from the monopolar foot contact sense circuit. This signal is
generated by a colpitts oscillator located on the display board and an isolation transformer
located on the main board. When a monopolar footswitch is connected to the rear of the
unit, the output for this circuit becomes a logic 1 (3.3 volts) signal.
NEM_DAT0 – NEM_DATA7
Data lines between the system logic and the NEM circuit. Used to monitor the
temperature of the NEM circuit and the return electrode contact impedance.
NEM_A_D_INTR This is a communication signal from the system logic to the NEM circuit.
NEM_A_D_OFL This is a communication signal from the system logic to the NEM circuit.
NEM_A_D_CS This is a communication signal from the system logic to the NEM circuit.
NEM_A_D_READ This is a communication signal from the system logic to the NEM circuit.
NEM_A_D_WRITE This is a communication signal from the system logic to the NEM circuit.
NEM_A_D_MODE This is a communication signal from the system logic to the NEM circuit.