Kikusui PLZ-4W Series, User Manual

Page: 141 / 218

PLZ-4W Applied Operation 6-51
(2) External resistance control
Connecting an external resistance in the range of 0 Ω to 10 k Ω to the PLZ-4W pro-
duces a resistance that is proportional or inversely proportional to the change.
Proportional control
The external voltage of 0
Ω
and 10 k
Ω
correspond to the maximum and minimum
resistances of the range, respectively.
Inverse proportional control
The external voltage of 10 k Ω and 0 Ω correspond to the maximum and minimum
resistances of the range, respectively.
Connected pins: J1-1 (signal), J1-3 (common)
Fig. 6-30 Equivalent circuit
Fig. 6-31 Control the resistance using external resistance
■
The setup procedure is the same as with CC mode.
See page 6-45 “Setup procedure for external voltage control”.
1
J1
Rin
Gm: Rated conductance
Rin : External variable resistor
0
≤
Rin
≤
approx. 10 k
Ω
Rin(k
Ω
)
10
1
R
0
1
R
0
Rin(k
Ω
)
10
3
Proportional control
Inverse proportional control
1 –
1 mA
MAX12 V
A COM
EXT R/V CONT
≈
Gm
≈ Gm
Twist
Gm
Gm
0S
External resistor Rin
0
Ω
: Rated conductance (S)
Proportional control
Inverse proportional control
: Conductance (before adjustment)
: Conductance (after adjustment)
: Conductance (after adjustment)
10 k
Ω
Conductance
Full scale adjustment
Offset
adjustment