52
5-7-3. Constant-voltage (CV) control with external voltage or resistance
It is possible to control the output voltage by external voltage or
external resistance through the connector J3 (EXT CONT) on the rear
panel if external control is selected in Section
“5-5-6. External control
(external voltage, external resistance)
” above. For the setting
procedures, see Section
“5-5-6. External control (external voltage,
external resistance)
”.
CAUTION
The negative side of the external voltage is connected with the negative
output terminal of the power supply unit. Use the external voltage
source in the floating condition to avoid accidents or malfunctioning.
If the external resistor is disconnected for some reason in the external
control mode, excessive voltage is applied to the output. Use a
shorting type switch if the constant voltage is to be controlled by
changing fixed resistors with the switch.
Control by external voltage and control by external resistance use the
same pins. Check with control is selected, control by external voltage
and control by external resistance, before using the pin.
CHA
：
Pins 14 and 16 (COM)
CHB
：
Pins 5 and 7 (COM)
1
2
25
26
EXT CONT 「J3」
Negative output
terminal of CHA
0V～
10V
0
Ω
～
10k
Ω
CHA
External control
※
Use a shielded cable or twisted pair wires for this control.
1
2
25
26
EXT CONT 「J3」
Negative output
terminal of CHB
0V～
10V
0
Ω
～
10k
Ω
CHB
External control
※
Use a shielded cable or twisted pair wires for this control.
Output voltage
FS
10V
External voltage
Output voltage
FS
10k
Ω
External
resistance
Fig.5-15 External Voltage/Resistance Control Terminal(CV)
