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6-52 Applied Operation PLZ-4W
6.8.5 External Control of CP Mode
The external control of CP mode can be carried out using external voltage or exter-
nal resistance. The wattage varies in proportion to the external voltage or external
resistance.
(1) External voltage control
Applying an external voltage in the range of 0 V to 10 V to the PLZ-4W produces a
wattage proportional to the change.
The wattage corresponding to the external voltage of 0 V is 0 W; the wattage corre-
sponding to the external voltage of 10 V is 100 % of the specified range.
Connected pins: J1-1 (signal), J1-3 (common)
• The maximum voltage that can be applied across pins 1 and 3 of the J1
connector is

11 V. Applying a voltage exceeding this value can damage
the PLZ-4W.
• Pin 3 of the J1 connector is connected the negative load input terminal. To
prevent damaging the PLZ-4W, be sure not to let the wire of pin 3 touch
any other pins.
Fig. 6-32 Equivalent circuit
Fig. 6-33 Control the resistance using external voltage
■
The setup procedure is the same as with CC mode.
See page 6-45 “Setup procedure for external voltage control”.
CAUTION
Po
≈
Pm
×
Ein
10
Po: Input power
Pm: Rated power
Ein: External voltage
0
≤
Ein
≤
10 V
1
3
J1
Ein
A COM
EXT R/V CONT
Approx. 10 k
Ω
–
+
Twist
V m
V m
0 V
External v olta g e Ein
0 V
: Rated v oltage
: Inp u t v oltage ( b efore adj u stment)
: Inp u t v oltage (after adj u stment)
Inp
u
t c
u
rrent
V
o
10 V
Offset
adj
u stment
F u ll scale adj u stment