OPERATION
79
Constant-Voltage (CV) Control with External Voltage or Resistance
Introduction
The output voltage can be controlled by an
external voltage or resistance through the J3
external connection (EXT CONT) on the rear panel
if external control is selected.
CAUTION
The negative side of the external voltage is
connected with the negative output terminal of
the power supply unit. Have the external voltage
source floating to avoid accidents or malfunctions.
If the external resistor is disconnected for some
reason when operating in the external control
mode, an excessively-high voltage could be
applied to the output. This occurs as a
disconnected resistor appears as an open circuit,
which in turn is interpreted as a resistance of
10kΩ. If fixed resistances are used, use shorting
-
type switches to switch between the fixed
resistances to avoid open circuits.
The pins used for external voltage control or for
external resistance control are the same. Check
with control method is selected (external voltage
or external resistance), before connecting the pins.
External Resistance and External Voltage Control
Pins for voltage control:
CH1: Pins 14 and 16 (COM)
CH2: Pins 5 and 7 (COM)
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