Kikusui PWX1500H, Руководство пользователя

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70
PWX
Controlling the Output Current
p.66
If you use a shielded cable, connect the shield to the negative output terminal. If the shield
needs to be connected to the Vext side, see “Cautions when using the external voltage
(Vext).”
Use pins 21 and 23 of the J1 connector.
Control using an external resistance (Rext)
p.46
By using an external resistance (Rext) to change the reference voltage’s voltage-divider ratio,
you can change the output current (Io) in the range of 0 to the 105 % of the rated output cur-
rent (Irtg).
To use an external resistance (Rext) to control the output current, set the CC control using an
external voltage or an external resistance in the CONFIG settings so that external voltage con-
trol is enabled (CF05: on).
The output current (Io) varies in the range of 0 to the rated output current (Irtg) when the
external voltage (Vext) is changed in the range of 0 V to 5 V (CF07: Lo) or in the range of 0 V
to 10 V (CF07: Hi).
External resistance (Rext) connection
For Rext, use a resistor that is rated at
approximately 10 k
Ω , 1/2 W or greater,
that has a low temperature coefficient,
and that will change little over time.
Examples of such resistors are metal
film or wire wound resistors.
To reduce the influence of noise on the
output, connect a 2-core shielded wire
or a twisted-pair wire across Rext, and
keep the wire as short as possible. If
the wiring is long, it becomes easy for
noise to influence the operation of the
PWX series. Even if you use wires that are designed to suppress noise, the PWX series may
not operate properly.
If you use a shielded cable, connect the shield to the negative output terminal.
Use pins 20, 21, and 23 of the J1 connector.
See
See
External voltage (Vext) 0 V to 5 V (CF07: Lo) External voltage (Vext) 0 V to 10 V (CF07: Hi)
Io = Irtg × Vext/5 (in A)
Vext = 5 × Io/Irtg (in A) Io = Irtg × Vext/10 (in A)
Vext = 10 × Io/Irtg (in A)
2-core shielded wire or
twisted-pair wire
Output terminals
J1
20
21
23
PWX
R ext
V ext
Wiper