Kikusui PAD-L III Series, Operation Manual

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PAD-L Applied Operation 4-19
7. Connect an external voltage source (Ei) and capacitor (C) between
terminals 1 and 2 of the control terminal board, as shown in Fig. 4-13.
WARNING
• Isolate the external voltage source (Ei) and the cable connected to
it with at least the isolation voltage of the unit. Float Ei outputs
instead of grounding them (floating). For details, see 2.6
"Grounding the output terminal."
• When using a shielded cable for the connection, protect the
uncovered part of the cable with an insulation tube of at least the
isolation voltage of the unit.
CAUTION
• Watch the polarity of Ei. Connection at incorrect polarity may
damage the unit.
• If Ei is disconnected, an unexpected voltage may be supplied by
external noise. To assure a good connection, use crimped
terminals.
• Do not apply the Eimax or more, or reverse the voltage between
control terminals 1 and 2. Otherwise, the unit may be damaged.
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
NOTE
• To reduce the effects of noise on output, use a 2-core shielded wire or a
twisted-pair wire to connect to terminals, making them as short as possible.
Longer wiring results in greater susceptibility to the effects of noise, and use of
cables with antinoise measures may not solve the problem, resulting in
improper operation.
When using a shielded wire, connect the shield to the + (pos.) output terminal.
• For Ei, use a voltage source of low noise and good stability. Noise in Ei is
multiplied by the amplification degree of the unit and appears in the unit's
output. Thus, output ripple noise may not meet the unit's specifications.
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
C 0 1 2
–
–S +S
+
3 4 5 6 7 8 9 10
E
i
−
＋
+ –
C
Output current Io
≈
Ei
R
[A]
Ei
≤
Eimax
R: Detecting resistor
Eimax: Maximum input voltage [V]
C
≥
10
µ
F 10 WV
Remove the shorting bar
Control terminals Output terminals
2-core shielded wire
or twisted-pair wire
Fig. 4-13 Connections for output current control with external voltage