ST Series Power Supply Instruction Manual REMOTE OPERATION
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5 REMOTE OPERATION
Remote Operation (from Process Controller or PLC)
Switching the Control Select toggle to the Remote position hands over all controls and
voltage setpoints for HV and Emission to connector J4 (Remote I/O) on the rear panel
of the ST Controller.
In this mode, HV and Emission can be turned on and off remotely from a Process
Controller or PLC. The HV output of the power supply may be set by the remote I/O or
locally from the ST Controller front panel (bypassing the Remote command). The
Emission output is set via a Process or a Deposition Controller.
The digital control signals can either be "active", i.e. an external (isolated) voltage
source or "passive", that is via dry contacts by using the internal +24VDC at pin 1 as a
voltage source.
If the Process Controller is not only to remotely control emission current but also set the
HV level, then a jumper needs to be installed on pins 7 & 8, otherwise HV level setting
will always be from the front panel potentiometer.
The green LEDs left and right of the Control select switch indicate which of the settings
are remotely controlled (illuminated = active).
For an operation from a Deposition Controller (Rate Controller) where no digital
ON/OFF signals are available, the ON/OFF push buttons on the front panel can be
enabled in the Remote mode by installing a jumper on J4 pins 12 & 13.
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