SL SERIES MANUAL
9
118006-001 REV Y
An alternate method of controlling the output remotely is
by using external resistance, such as a potentiometer or a
resistor network. For remote control the jumpers are
removed and the desired register configuration installed.
See Figure 3.2B on page 13 for the wiring diagram.
REMOTE MONITOR:
Test points are made
available at the terminal block on the rear of the
chassis for monitoring the voltage and current output.
(Output power monitor is included with the CPC and
APT option). The test points are always positive
regardless of the output polarity where 0V to 10V
equals 0 to 100% of the output
0.5%. Test points
have an output impedance of 5K ohms. See Figure
3.3 on page 14 for the test point designation.
REMOTE CONTROL:
Remote control of the
HIGH VOLTAGE ON and HIGH VOLTAGE OFF
can be accomplished via the rear panel interface.
HIGH VOLTAGE OFF and HIGH VOLTAGE ON
can be controlled by momentary normally closed and
normally open contacts respectively. See Figure 3.4
on page 14 for the recommended interface.
EXTERNAL INHIBIT:
Allows the user to inhibit
the power supply output without switching HIGH
VOLTAGE OFF control. This circuit can be used to
generate fast slewing output waveforms or control of
high voltage generation as in Laser and Capacitor
discharge applications. The maximum inhibit rate
should not exceed 5Hz. Consult the factory for
higher repetition rates or high pulse load applications.
See Figure 3.5 on 15 for the recommended interface
circuit.
IT IS EXTREMELY DANGEROUS TO USE THIS
INHIBIT CIRCUIT TO INHIBIT HIGH VOLTAGE
GENERATION FOR THE PURPOSE OF
SERVICING OR APPROACHING ANY AREA
OR LOAD CONSIDERED UNSAFE
DURING NORMAL USE.
EXTERNAL INTERLOCK:
Interlock connections
are provided on the terminal block TB1-3 (J5-3) and
TB1-4 (J5-4) on the rear of the chassis for connection
to a safety switch. The unit will not operate unless
the interlock circuit is closed. If the interlock is not
being used, the jumper installed on the terminals
before shipping must be in place. If the jumper is
missing, or there is an opening between the interlock
terminals, the unit’s high voltage inverter will be
disabled. During high voltage operation, revert to the
HIGH VOLTAGE OFF mode. Subsequent closing of
the interlock circuit will NOT return the unit to the
HIGH VOLTAGE ON mode. This must be
accomplished by depressing the HIGH VOLTAGE
ON switch. See Figure 3.6 on page 15 for the
recommended interface circuit
ARC DETECT / ARC QUENCH / ARC COUNT
:
The ARC DETECT circuit senses dynamic arcing or
discharge conditions present at the output load. If an
arc occurs, the output is inhibited for one second.
After the 0.5 second period, the output is ramped up
to the previous set level. This ramp is based on the
standard six second slow start feature. The ARC
DETECT ramp circuit may be disabled by removing
CR32 on the Control/Power Pwb. Caution should be
observed if this feature is disabled. Discharge rates
of greater then 1Hz may cause excessive power
dissipation in the power supply’s output limiting
resistors.
The ARC COUNT feature will allow the user to program
the ARC fault parameters. The ARC indicator on the
front panel will illuminate for approximately one second
after each arc has occurred. The power supply can be
programmed to trip the POWER DOWN mode if an arc
occurs.
The standard feature is programmed to trip the power
supply if 8 arcs occur within a twenty second period.
REMOTE HIGH VOLTAGE ON & REMOTE
HIGH VOLTAGE OFF
: Signals are provided for
remote monitoring of the HIGH VOLTAGE ON/OFF
status. See Figure 3.7 on page 16 for recommended
interface.
REMOTE MODE INDICATORS:
Signals are
provided for remote indication of the control mode
status, voltage control, current control, and power
control. See Figure 3.8 on page 17 for the
recommended interface.
WARNING
