Kikusui PLZ164W User Manual page 133

(2) External resistance control
1 mA
MAX12 V
EXT R/V CONT
Offset
adjustment
PLZ-4W
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)
J1
1
3
A COM
Fig. 6-26 Equivalent circuit
Im
0A
0 Ω
External resistor Rin
Fig. 6-27 Control the current using external resistance
Twist
Full scale adjustment
Im
Proportional control
Inverse proportional control
10kΩ
Proportional control
Rin(k )
Io Im
10
Inverse proportional control
Rin(k )
Io Im
1 –
Rin
10
Io: Input current
Im: Rated current
Rin: External variable resistor
0 Rin Approx. 10 k
: Rated current
: Input current (before adjustment)
: Input current (after adjustment)
: Input current (after adjustment)
Applied Operation 6-47