© National Instruments | 2-29
RMX Programmable Power Supplies User Manual
CF09 External Control Parameter for Turning Output On and Off
Selects whether an external contact (pin 18 on the J1 connector) will be used to turn output on
and off. This is set to “oFF” when the panel settings are reset (CF00) and when a preset memory
entry is recalled.
You can only specify this parameter when the RMX programmable power supply is being used
as a master unit.
CF10 External Control Logic Level for Turning Output On and Off
Sets the logic level used when an external contact (pin 18 on the J1 connector) is being used to
turn output on and off.
You can only specify this parameter when the RMX programmable power supply is being used
as a master unit.
CF11 Bleeder On or Off
Turns the bleeder circuit on and off. You can turn the bleeder circuit off when you don’t want
the electric charge stored in the output capacitance of the supply to sink into the internal bleeder
circuit, such as when you are charging a battery.
Even when the output terminal is off (open) or when the set voltage is 0 V, if you turn the bleeder
off, a voltage as large as a few hundred millivolts may appear at the output terminal.
Depending on whether the bleeder circuit is enabled, the fall time of the output voltage and the
amount of current sunk into the power supply will vary when an external load is connected.
When using master-slave parallel operation or series operation, use the same settings on all
connected units.
Value Parameter Description
oFF External control is not performed (factory default setting).
on External control is performed.
Value Parameter Description
Lo Output is turned on when a LOW signal (0 to 0.5 V) or
short-circuit is received (factory default setting).
hi Output is turned on when a HIGH signal (4.5 to 5 V) or
open-circuit is received.
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