Bovie Aaron 1250, Service Manual, Page: 42 / 68

Signal Name Description
TAP_SEL This is an output signal from the system logic that controls
relays on the main board. The relays select which
secondary windings will be used from the monopolar
output transformer.
OUT_SEL This is an output signal from the system logic that controls
relays on the main board. They control which output
transformer provides the RF output circuit delivered to
the patient.
HAND/FOOT_SEL This is an output signal from the system logic that controls
relays on the main board. These relays direct which output
jack receives the output RF power.
The output power for monopolar modes is switchable
from foot-controlled hand piece activation, to a hand-
controlled (switching pencil) activation.
RF_DRV This is an output signal from the digital PWM circuit that
controls the pulse width duration for the RF drive.
CON_SENS This is an input signal that informs the system logic if the
24 pin ribbon cable (between the main board and the
display board) is connected.
When the cable is connected, a logic 0 (0 VDC) is sent to
system logic section. When the cable is damaged, not
secure, or not connected, a logic 1 (5 VDC) is sent to the
system logic.
TEMP_SEN This is an input signal from the Temperature Sense Circuit
that informs the system logic if the internal temperature of
the unit is above 85° C.
If the internal temperature of the unit is below 85° C a
logic 1 (5 VDC) is sent to the system logic.
If the internal temperature of the unit rises above 85° C a
logic 0 (0 VDC) is sent to the system logic.
HV_SENS This is an input signal from the high voltage sense circuit
that informs the system logic if a high voltage error
has occurred.
If the line voltage is within normal operating parameters a
logic 1 (5 VDC) is sent to the system logic.
If the line voltage increase by more than 30% a logic 0
(0 VDC) is sent to the system logic.
42 Bovie / Aaron Medical