PLZ-5W User’s Manual 95
External Control
Load Setting Control
Constant current (CC), constant resistance (CR), and con-
stant power (CP) control
You can control the load values (current, conductance, power) of CC, CR, and CP modes using external
voltage. When you apply an external voltage between 0 V to 10 V to the EXT CONT connector, a load set-
ting proportional to the change can be obtained.
An external voltage of 0 V results in a load value that is 0 % of the range rating, and an external voltage of
10 V in a load value that is 100 % of the range rating. The accuracy cannot be guaranteed when the exter-
nal voltage is less than 0 V or more than 10 V.
1
Turn the POWER switch off.
2
Connect an external voltage across pins 21 and 23 of the EXT CONT connector.
To prevent noise interference, use twisted wires for the signal cables.
Use a highly stable external voltage that has low noise.
3
Turn the POWER switch on and check that the load is off.
4
Sets the operation mode to CC, CR, or CP, and set the current range.
If you also want to control the current range externally, be sure to set the range to H.
5
Press SOURCE and then More.
6
Use the rotary knob to select CC, CR, or CP under External Control, and then press
the Edit key.
7
Use the rotary knob to select Enable, and then press ENTER.
External control of each mode becomes possible. If Disable is selected, external control of each
mode is disabled. This completes the setting.
10 V
Set: Load value
Ein: External voltage
0V
Set
To avoid damaging the product, observe the following precautions.
• The maximum voltage that can be applied across pins 21 and 23 of the EXT CONT con-
nector is ±11 V. Do not apply a voltage that exceeds this.
• Pin 23 of the EXT CONT connector is connected to the negative (-) load input terminal.
Make sure that the wire of pin 23 does not touch any of the other pins.
21
23
+
–
A COM
EXT CONT MODE
10 kȍ
Twist
EXT CONT
PLZ-5W
External voltage
To Next Page
