Tuttnauer 2540 EHS, Technician Manual

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17
4.5 AC - Board - AC-T1
The AC-T1 board provides AC filtering to protect the power supply
and the control system from voltage spikes. This board contains the AC
voltage drivers that control the AC devices in the system. This is done
by accepting command signals indirectly from the DIG-T2 board
through the ANL-T2 analog board and then turning the devices on or
off.
The AC-T1 board includes:
— A filter circuit utilizing the L1C5 isolation transformer.
— JP2 provides filtered power to the power supply.
— Three 230/115 VAC triac control circuits. These are the AC
drivers used in controlling the water and vacuum pumps and the
steam valve.
— The maximum amperage this board is capable of controlling is 6A.
— Spike protection is provided by three components, RV1, RV2 and
RV3. These components provide a resistibility proportional to the
spike level. The resistibility decreases when the spike level
increases, so that the current will be transferred to the ground
instead of damaging the autoclave’s system.
— JP1 is the control signal input from the ANL-T2 board
— JP3 is the AC input connector.
— JP4 is the output to the steam valve if an AC valve is used
— JP7 is the output to the water and vacuum pumps