SL2KW SERIES MANUAL
9
118088-001 REV C
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 J5-3 and 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 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 .5 seconds.
After the .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 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 for the recommended
interface.
WARNING
