EPM/SMS MANUAL
8
118026-001 REV K
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. 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. A 0 to 10VDC signal is supplied
to Pin 6 of the control input connector for voltage
programming. A 0 to 10 VDC signal is supplied to Pin 7
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 3.2A and 3.5B 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 and 3.5B 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 the
output. See Figure 3.3 and 3.6 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 control. See Figure 3.4 and 3.7 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.
