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User Manual
D750
DC Power Supply
3.2.11.2 Safe start mode (SAF)
In this mode, the power supply restores its last operation setting and sets the Output
to Off state. At start-up, the output is disabled and the output voltage and current are
zero. To enable the output and restore the last output voltage and current limit values,
momentarily press OUT button.
3.2.12 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
shows "O7P" 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.
1. Safe start mode: In Safe start mode, the power supply stays off after the over
temperature. Condition has been removed. The display continue to shows "O7P" and
the ALARM LED continues to blink. To reset the OTP circuit, press OUT button (or send
OUTON command via the serial port).
2. Auto-restart mode: In Auto-restart mode, the power supply recovers to it's last setting
automatically when the over temperature condition is removed.
3.3 Last Setting Memory
The power supply is equipped with Last Setting Memory, which stores power supply
parameters at each AC turn-off sequence.
STOREDPARAMETERS:
1. OUT On or Off
2. Output voltage setting (PV setting)
3. Output current limit (PC setting)
4. OVP setting
5. UVL setting
6. FOLD setting
7. Start-up mode (Safe or Auto-restart)
8. Remote/Local: If the last setting was Local Lockout (latched mode), the supply will return
to Remote mode (non-latched).
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