55
83-530-000 Rev J
5.13. Over Temperature Protection (OTP)
The OTP circuit shuts down the power supply before the internal components can exceed
their safe internal operating temperature. When an OTP shutdown occurs, the display show
“OTP” and the ALARM LED blinks.
Resetting the OTP circuit can be automatic (non-latched) or manual (latched) depending on
the Safe or Automatic restart mode.
a) Safe start mode: In Safe start mode, the power supply stays off after the over
temperature condition has been removed. The display continues to show “OTP” and the
ALARM LED continues to blink. To reset the OTP circuit, press OUT button (or send OUT
ON command via the serial port).
b) Auto-restart mode: In Auto-restart mode, the power supply recovers to its last setting
automatically when the over temperature condition is removed.
5.14. Last Setting Memory
The power supply is equipped with Last Setting Memory, which stores power supply
parameters at each AC turn-off sequence.
Stored Parameters:
OUT On or Off
Output voltage setting
Output current limit
OVP level
UVL level
FOLD setting
Start-up mode (Safe or Auto-restart)
Remote/Local (Local Lockout will return to Remote mode)
Address setting
Baud rate
Locked/Unlocked Front Panel
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