BHK-1/2-MG 030916
3-7
3.2.7.3
REMOTE SHUTDOWN USING EXTERNAL TRIGGER PORT
A temporary short between pin 2 and pin 1 of the External Trigger port (or if pin 2 is at TTL logic
1, applying a temporary logic 0 to pin 2 referenced to pin 1) produces a shutdown signal which
immediately shuts down the power supply output: output is disabled and voltage and current are
set to zero (1 LSB maximum for voltage, 20 LSBs maximum for current). The DCL Control set-
ting (see PAR. 3.3.2) determines the output settings when the output is enabled: either restored
to the voltage/current settings in effect at the time shutdown was initiated, or voltage and current
still programmed to zero
NOTE: Turn off power to the unit or disable the output before inserting the plug in the External
Trigger port to avoid unintentionally initiating shutdown or trigger.
3.2.7.4
POWER UP DC OUTPUT CONTROL
The output of the power supply can be programmed to be either enabled or disabled upon
power-up. With the power supply in command entry status
(:_:_:)
, press
the
MENU
key until
LCD displays
OUT off @Pwr-Up
or
OUT on @Pwr-Up
. indicating whether the Digital DC Out-
put will be on (enabled) or off (disabled) upon power-up. Press
1
to enable the Digital DC Output
upon power up. This sets the output to zero volt and current to the Power-up and Reset current
value. Press
0
to disable the output upon power up. Press
CLEAR
or
RESET
to exit menu and
return to command entry status.
3.2.8
RESET OPERATION
RESET
overrides all other local commands to reset the power supply to the power on defaults:
output voltage set to zero, output current set to the value specified as the power-up and reset
current (see PAR. 3.2.8.1), overcurrent and overvoltage protection set to the maximum values
per PAR. 1.4.4. The output is either enabled or disabled, as determined by the front panel DCL
Control setting (enabled for “output = 0,” disabled for “output unchanged;” see PAR. 3.3.2 for
details). The default configuration is for RESET to disable the output (output OFF). The power
supply remains in command entry status.
3.2.8.1
SETTING POWER-UP & RESET CURRENT
The factory setting of the power-up and reset current is 1.28% of Io max. This insures that the
power supply is in voltage mode when the unit is initially turned on or a reset occurs. The user
can change this value to be from 0 to 10% of the unit’s rated current. To change this setting,
ensure the unit is in command entry status
(:_:_:)
and press the
MENU
key until the top line
of the display presents the message
PWR-UP & RESET
and the bottom line shows
ISET =
n.n ma
, where
n.n
is the present value of power-up and reset current. Press
MENU
key to
leave the value unchanged. Press number keys and the decimal key followed by the
ENTER
key to validate a new value (the
key erases data just entered) or
CLEAR
to exit without
changing the setting.
If the value entered is higher than 10% of the rated current for the power supply, the bottom line
of the LCD flashes
Iset MAX =
xx where xx = I
O
max/10 (e.g., for BHK500-80MG, xx =
8.0mA). The unit remains in data entry status
(=_=_=)
waiting for a value equal to or less than
the 10% of rated current.
Summary of Contents for BHK-MG Series
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Page 18: ...xii BHK MG030916 FIGURE 1 1 BHK MG 40W SERIES PROGRAMMABLE POWER SUPPLY...
Page 26: ...1 8 BHK 1 2 MG OPR 030916 FIGURE 1 3 RA 24 RACK ADAPTER WITH TWO 1 2 RACK BHK MG 40W UNITS...
Page 35: ...BHK 1 2 MG SERIES 030916 2 3 FIGURE 2 2 BHK MG SERIES REAR PANEL CONTROLS AND CONNECTIONS...
Page 100: ...3 54 BHK 1 2 MG 030916 FIGURE 3 20 SERIES AUTOMATIC CONFIGURATION...
Page 113: ...BHK 1 2 MG 030916 3 67 FIGURE 3 25 PARALLEL MASTER SLAVE CURRENT MODE CONFIGURATION...
Page 150: ......
