4-6 Remote Control
PAS SERIES
•
Make sure the polarity of Vext is correct. Otherwise,
damage to the unit may result.
•
Do not apply voltage or reverse voltage exceeding
10.5 V across the external voltage control pins. Oth-
erwise, damage to the unit may result.
• The input impedance across the external voltage control pins
is approximately 30 k
Ω
.
•
Use a low-noise and stable voltage source for Vext. The noise
in Vext is multiplied by the amplification factor of the unit
and appears at the unit's output. Thus, the output ripple noise
may not meet the unit's specifications.
• To minimize the influence of noise on the output, use a 2-
core shielded wire or a twisted-pair wire to connect the con-
trol terminals and Vext. Make the wires as short as possible.
Susceptibility to the effects of noise increases as the wires
get longer. When wires are long, proper operation may be
hindered even if a cable with anti-noise measures is used.
When using a shielded cable, connect the shield to the -
(neg.) output terminal. If the shield needs to be connected to
the Vext side, see next page " Connecting the Shield to the
Vext Side".
■
External voltage source (Vext) connection
Pins 1 and 4 of the J1 connector are used.
Fig.4-1 Connection of the output voltage control using
external voltage
CAUTION
NOTE
J1
1
25
2
4
13
14
26
2-core shielded or
twisted-pair wire
Vext
+
–
Summary of Contents for PAS 10-105
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