SL150 MANUAL
20
118093-001 REV B
5.9 External Fault Relay Option
EFR
The external fault relay option provides a set of customer
accessible relay contacts that are controlled by the fault
status circuitry of the applicable SL Series power supply.
A standard SL power supply will revert to the “power
down” mode with a visual front panel indication if any of
the following fault conditions occur:
Overvoltage:
Greater than 110% of maximum
output voltage was produced by the power supply.
Overcurrent
: Greater than 104% of maximum
output current was produced by the power supply or
the AOL circuitry was activated.
Overtemperature:
Excessive temperature has been
sensed within the chassis.
Regulation Error:
Lack of required output power to
maintain regulation
Arc (Shutdown):
Arc sensing circuit has shut down
the supply due to excessive arcing.
Overpower:
The power supply has exceeded the
internally set power limit level, if such circuitry is
installed.
With the installation of the EFR option, if any of these
faults occur, a relay will be activated to provide a remote
indication that the power supply has reverted to the
“power down” mode. The common, normally open and
normally closed set of contacts are provided. Relay
contacts are rated at 1A at 30Vdc or 0.5A at 48Vac.
Connections on JB4 can be made as follows:
(JB4-12)
Relay Common
(JB4-NA)
Normally Closed
(JB4-13) Normally
Open
Resetting the front panel and EFR relay is accomplished
by depressing the green front panel HV OFF push-button
switch, which reverts the power supply back to the
“standby” mode. Removal and reapplication of the AC
line input voltage will also reset any fault.
The circuitry and components required for the EFR
option are installed at the factory when this option is
ordered.
5.10 No ARC Detect Option NAD
The No ARC Detect option may be utilized by removing
CR32 on the control board. Caution should be observed
if this feature is disabled. Discharge rates of greater than
1Hz may cause excessive power dissipation in the power
supply’s output limiting resistors.
5.11 Remote Fault Reset Option
RFR
Allows the user to remotely reset a fault by momentarily
grounding JB4-12.
5.12 Custom Designed Models-X#
Units built to customer specification are assigned an X
number by the factory. If this unit is an X model, a
specification control sheet is added at the end of the test
of this instruction manual.
Spellman welcomes the opportunity to customize units to
fit your requirements or to develop new products for your
applications. Contact the Spellman Sales Department
with your needs.
