83-517-000 Rev.
A
47
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 Output current
limit with the output Enabled (Auto-Restart mode) or start with the output disabled (Safe-Start mode). Press and
hold the
OUT
button to select between
Safe-Start
and
Auto-Restart
modes. The
VOLTAGE
meter will
continuously cycle between “
SAF
” and “
AU7
” every 3 seconds. Releasing the
OUT
button while one of the
modes is displayed, selects that mode. The default setting at shipment is Safe-Start mode.
Auto-Restart Mode
5.11.1
In this mode, the power supply restores its last operation setting. Upon start-up (AC Input power recycle), the
output is enabled or disabled according to its last settings.
Safe-Start Mode
5.11.2
In this mode, the power supply restores its last operational settings and sets the Output to an
OFF
state. At start-
up (AC Input power recycle), the output is disabled and the Output voltage and Output current are zero. To
Enable the output and restore the last Output voltage and Output current limit values, momentarily press the
OUT
button.
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
VOLTAGE
meter displays
“
O7P
” and the
ALARM
LED
blinks.
Resetting the
OTP
circuit can be automatic (non-latched) or manual (latched) depending on the Safe-Start or
AutoRestart mode.
1.
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 “
O7P
” and the
ALARM LED
continues to blink. To reset the
OTP
circuit, press the
OUT
button (or send an
OUT ON
(
OUT 1
) command via the RS-232/RS-485 serial
communication port).
2.
Auto-Restart mode:
In Auto-Restart mode, the power supply recovers to its last setting operational
automatically when the over temperature condition is removed.
5.13
LAST SETTING MEMORY
The power supply is equipped with Last Setting Memory, which stores several power supply parameters at each
AC turn-off sequence.
STORED PARAMETERS:
1.
OUT
put On or Off
2. Output voltage setting (PV setting)
3. Output current setting (PC setting)
4. Output OVP level
5. Output UVL level
6.
FOLD
back setting
7. Start-up mode (Safe-Start or Auto-Restart)
8. Remote/Local mode: If the last setting was Local Lockout, (latched mode), the supply will return to
Remote mode (non-latched).
9. Address setting
10. Baud rate setting
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 (for parallel operation)
5.14
SERIES OPERATION
Power supplies of the
SAME MODEL
can be connected in series to obtain increased output voltage. Split
connection of the power supplies gives both positive and negative output voltage.
CAUTION
Do not connect power supplies from different manufacturers in series or in parallel.
