Kikusui PAN 110-1.5A, Operation Manual

Page: 78 / 160

4-18 PAN-A
4.3.3 Controlling output current with external resis-
tor
This method is used to control output current using a 0
Ω
to approx.
10 k
Ω
external resistor.
• The insulation of the external resistance (Rext) and
the cable connecting to it should be greater than the
isolation voltage of the unit. For details on the isola-
tion voltage of each model, see Chapter 7 "Speci
fi ca-
tions".
• When using shielded wires for connection, protect
the shielded wire by using insulation tubes with a
withstand voltage higher than the isolation voltage of
the unit.
• Never attempt to carry out wiring to the control termi-
nals with the POWER switch turned ON. Otherwise,
electric shock or failure of the internal circuit may be
caused, and may result in improper operations.
Connection and setup procedure
1. Turn off the OUTPUT switch.
2. Turn off the POWER switch.
3. Set the control switches S3 and S4 to the position as
shown in Fig.4-13.
4. Connect an external resistor across the control terminals
[8] and [9] as shown in Fig.4-13.
• If Rext is disconnected, the internal overcurrent-pro-
tection circuit will be activated, causing the "ALM"
LED to light up. However, current exceeding the rat-
ing will be output until this circuit functions. Thus,
connect Rext to the control terminals securely.
• To use Rext which consists of a multiple number of
fi xed resistors and a switch, and select one of them
for control, use a short circuit type or continuous type
switch.
WARNING
CAUTION