Kikusui PLZ1004W - Page 133

PLZ-4W Applied Operation 6-47
(2) External resistance control
Connecting an external resistance in the range of 0  to 10 k to the PLZ-4W pro-
duces an input current that is proportional or inversely proportional to the change.
Proportional control
The input current corresponding to the external resistance of 0  is 0 A; the input
current corresponding to the external resistance of 10 k is 100 % of the specified
range.
Inverse proportional control
The input current corresponding to the external resistance of 10 k is 0 A; the input
current corresponding to the external resistance of 0  is 100 % of the specified
range.
Connected pins: J1-1 (signal), J1-3 (common)
Fig. 6-26 Equivalent circuit
Fig. 6-27 Control the current using external resistance
J1
Rin
Io: Input current
Im: Rated current
Rin: External variable resistor
0  Rin  Approx. 10 k
Rin(k)
10
Io §Im
Rin(k)
10
1 mA
MAX12 V
1
3
A COM
EXT R/V CONT
Proportional control
Inverse proportional control
1 –
Io §Im
Twist
Im
Im
0A
External resistor Rin
0 Ω
Input current Io
: Rated current
: Input current (before adjustment)
: Input current (after adjustment)
: Input current (after adjustment)
10kΩ
Proportional control
Inverse proportional control
Offset
adjustment
Full scale adjustment