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Section 4. Remote Operation
Status Flags
Release A 51
Status Flags
The power supply has 5 status flags to indicate the operating state. The S/D LED on
the front panel, and 4 LEDs visible from the top of the unit. The flags, listed in order
from front to rear, are OTP, OVP, SNS-PROT and AC-FAIL.
In the event of one of the flags being tripped, the flag is raised along with S/D flag
on the front panel. An S/D flag with none of the other 4 flags indicates remote
shutdown (J210,1and 2).
OTP Over-temperature protection indicates a supply shutdown due to
over-temperature triggering the OTP circuitry. The unit has an
auto-restart feature when the supply’s temperature is within the correct
temperature range again.
OVP Over-voltage protection indicates shutdown due to output voltage
exceeding the threshold preset using the OVP trimpot on the front
panel.
SNS-PROT Sense line protection indicates a shutdown due to a voltage drop on the
load lines exceeding 5 V per line (3 V per line for 7.5 V model) in remote
sense mode. This condition may also occur if the unit is operated
without the J207 default sense line connector.
AC-FAIL AC fail indicates a mains V
ac
input out of the supply’s specified range
(i.e. below 85 V
ac
or over 264 V
ac).