PTV MANUAL
6
118012-001 REV B
PROGRAMMING AND
CONTROL
J2
J1
J3
FUSES
HIGH VOLTAGE OUTPUT
HIGH
VOLTAGE
LOAD
SIGNAL
MONITORING I/O
6-32 THREADED INSERT
CAN BE USED FOR
LOAD TERMINATION
IEC 320
LINE CORD PROVIDED
±10%, 50/60Hz
(OTHER VOLTAGES
115VAC INPUT
AVAILABLE)
LINE INPUT
HAUPPAUGE, NY 11788 MADE IN USA
HIGH VOLTAGE ELECTRONICS CORP
Figure 3.1 Typical Operating Set Up
3.2 Standard Features
A note on remote interface circuitry and remote signal
grounding. Whenever possible, electrical isolation should
be provided when interfacing with any high voltage
power supply. For enable/disable signal connections, an
isolated relay or optocoupler should be used. For OVP
indication an LED or optocoupler should be used. If
possible, analog programming and monitoring signals
should be isolated via analog isolation amplifiers.
Spellman application engineers are available to assist in
interface circuitry design. All interface cables should be
properly shielded. All power supply signals should be
referenced to the power supplies signal ground or power
supply chassis ground
REMOTE PROGRAMMING:
Allows remote
adjustment of the output voltage and current via an
external voltage source. 0-10VDC signal is supplied to
Pin 4 of the control input connector for voltage
programming and 0-10 VDC signal is supplied to Pin 2 of
the control input connector for current programming.
Programming signals should be referenced to Pin 9 of the
control input connector signal ground. By adjusting the
voltage source from 0 volts (zero output) to 10 volts (full
rated output) the desired output can be selected. See
Figure 3-2 A for wiring diagram and specifications.
An alternate method of controlling the output remotely is
by using external resistance such as a potentiometer or a
resistor network. See Figure 3.2B for wiring diagram.
Remote Monitoring:
Test points are made available for
monitoring the voltage and current output. The test
points are always positive regardless of the output
polarity, where zero (0) to 10 (10) volts equals 0-100% of
output. See Figure 3.3 for test point wiring.
Enable/Disable Control:
Remote control of the high
voltage on and high voltage off can be done via the
enable/disable logic control. See Figure 3.4 for
recommended interface circuits.
WARNING
It is extremely dangerous to use this
circuit to inhibit high voltage generation
for the purpose of servicing or
approaching any area of load considered
unsafe during normal use.
OVP Indicator/Power Supply On Indicator:
A logic
signal is provided which can be used to determine if the
OVP Shutdown Circuit is active, and/or if the power
supply is ON. See Figure 3.5
