low, with a maximum sink current of 1mA; when no fault condition occurs, the PS_OK level is high with a maxi- mum source current of 2mA. The following faults will set the PS_OK to a Fault state:
*OTP | *Enable/Disable open (Power supply is disabled) |
*OVP | *SO (Rear panel |
*Foldback | *IEEE failure (With optional IEEE interface) |
*AC fail | *Output Off |
5.11 SAFE-START AND AUTO-RESTART MODES
When turning On the power supply AC On/Off, it can start to its last setting of Output Voltage and Current with the output Enabled
5.11.1 Auto-restart mode
In this mode, the power supply restores its last operation setting. Upon
5.11.2 Safe-start mode
In this mode, the power supply restores its last operation setting and sets the Output to an Off state. At
5.12 OVER TEMPERATURE PROTECTON (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” (“7” repre- sents “T”) and the ALARM LED blinks.
Resetting the OTP circuit can be automatic
1.
2.
5.13 LAST SETTING MEMORY
The power supply is equipped with Last Setting Memory, which stores several power supply parame- ters at each AC
STORED PARAMETERS:
1.OUT On or Off
2.Output Voltage setting (PV setting)
3.Output Current setting (PC setting)
4.OVP level
5.UVL level
6.FOLD setting
7.
8.Remote/Local: If the last setting was Local Lockout, (latched mode), the supply will return to Re- mote mode
9.Address setting
10.Baud rate
11.Locked/Unlocked Front Panel (LFP/UFP)
(Items 8, 9, 10 are related to Remote Digital Control operation and are explained in Chapter 7)
12.Master/Slave setting
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