Smart LT Manual
Dynatronix, Inc.
198-0853-02 Rev F
Page 23 of 126
NOTE:
The inhibit input and the host port can also change the operate state. See
8.0.Remote
Operate/Standby Control
and for details regarding these other methods of operate/standby
control.
NOTE:
The operate switch can be disabled to prevent changing the operate state from the front
panel (see
6.3.7.Front Panel Button Lock Outs
).
6.1.6. Remote / Local Switch
This switch toggles between local control (RMT lamp off) and remote control (RMT lamp on). In
local control mode the LT front panel is used to control the supply. In remote control mode the
power supply can be controlled by the analog control interface or by the host port (depending on
the configuration of the supply, see
6.3.3.Remote Control Configuration
). When the supply is in
remote control mode host communications are indicated by flashing the remote lamp. The
remote/local state is maintained through a power cycle.
NOTE:
When the unit is in remote control mode (RMT lamp is illuminated) settings (current and
voltage settings, cycle settings, and tolerance settings) cannot be adjusted from the front panel.
NOTE:
The remote switch can be disabled to prevent changing the remote/local state from the
front panel (see
6.3.7.Front Panel Button Lock Outs
).
6.1.7. Inhibit Lamp
The inhibit lamp is ON when the inhibit input is active. The output of the power supply is disabled
by a hardware interlock when the inhibit lamp is ON. The inhibit input can be used has a
hardware disable of the output or for remote operate/standby control, see
8.0.Remote
Operate/Standby Control
for details.
6.1.8. Fault Lamp
When a fault is active the fault lamp is ON. When one or more faults are active the display will
alternate between an error code and the normal display value. Error codes can also be read
using the host port. Some faults will cause the output of the power supply to be disabled and will
prevent operate mode.
Most error codes will self clear when the error condition clears. However certain error codes
require manual clearing. An example of such an error code would be a power failure error code.
The power failure error code is set if the unit lost power while the supply was in operate mode and
the power failure alarm is enabled. When power returns the error code remains active until it is
manually cleared.
See
Appendix C:
for a list of error codes. See
6.5.Error Messages
for more details regarding the
display and clearing of error codes.
6.1.9. Over Temperature Lamp
6.1.9.1.
Over Temperature Warning
The over temperature lamp blinks on and off when the internal heat sink temperature reaches the
warning level. The warning level indicates that the heat sink temperature is approaching unsafe
levels that could damage the unit. A warning also indicates that if the temperature continues to
increase the unit will be forced to standby mode until it cools down. The display will alternate
between the normal display and the heat sink temperature. The output of the power supply is not
affected by an over temperature warning.