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SurgiStat Low-Power Electrosurgical Generator Service Manual
SurgiStat Control Signal Inputs and Outputs
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 handpiece activation to 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.
SENS_HAND_B
This is an input signal that informs the Hand B request sense circuit.
Hand B refers to the Coag button on the handpiece. This signal is
generated by a colpitts oscillator located on the main board.
SENS_HAND_A
This is an input signal that informs the Hand A request sense circuit.
Hand A refers to the Cut button on the handpiece. This signal is
generated by a colpitts oscillator located on the main board.
SENS_FOOT_B
This is an input signal that informs the Foot B request sense circuit.
Foot B refers to the Coag pedal on the footswitch. This signal is
generated by a colpitts oscillator located on the main board.
SENS_FOOT_A
This is an input signal that informs the Foot A request sense circuit.
Foot A refers to the Cut pedal on the footswitch. This signal is
generated by a colpitts oscillator located on the main board.
NEM_T1
This is an isolated analog signal used in conjunction to NEM_T2 to
measure return electrode contact impedance.
NEM_T2
This is an isolated analog signal used in conjunction to NEM_T2 to
measure return electrode contact impedance.
Signal Name
Description
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