Kikusui PAN 110-1.5A, Operation Manual

Page: 75 / 160

PAN-A 4-15
Chap
.4
Applied Oper
ation
1
output voltage. If output preset on the panel needs to be fi xed,
use the supplied guard cap.
4. Set the control switches S1 and S2 to the position shown in
Fig.4-11.
5. Connect the voltage source across the control terminals [2]
and [3] as shown in Fig.4-11.
• Watch the polarity of Vext. Connection at incorrect
polarity may damage the unit.
• If Vext is disconnected, an unexpected voltage may
be supplied by external noise. Connect the Vext to
the control terminals
fi rmly.
• Do not apply a voltage of 10.5 V or more, or reverse
the voltage between control terminals [2] and [3].
Otherwise, the unit may be damaged.
• To minimize the in fl uence of noise on the output, use a 2-core
shielded wire or a twisted-pair wire to connect the control ter-
minals and Vext. If using a shielded wire, connect the shield
to the + (pos.) output terminal.
Note that longer lengths of wiring result in more susceptibil-
ity to the effects of noise; use of cables with anti-noise mea-
sures may not solve the problem.
• The input impedance across the control terminals [2] and [3]
is approx. 10 k Ω .
• For Vext, use a voltage source of low noise and good stability.
Noise in Vext is multiplied by the ampli fi cation degree of the
unit and appears in the unit's output. Thus, output ripple
noise may not meet the unit's speci
fi cations.
CAUTION
NOTE