Autonics DPU Series User Manual page 30

6.Parametersettingandfunctions
(3)Staticcurrentmode[ C-FB ]
If temperature coefficient of load (platinum, molybdenum, tungsten, etc) changes 6 to 12 times
based on room temperature, it outputs constant current which is proportion to control input not to
change output voltage for power supply variation, load resistance variation.
140
120
100
80
60
40
20
0
50
Temperature(℃)
(4)Staticpowermode[
It outputs constant power which is proportion to control input even though load variation and
power supply variation. It is proper control method for a heater which resistance value variation by
carbide(SIC) heating is big.
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
500
Temperature(℃)
Output characteristics is proper 50% of the curve which connects the point (A) [output voltage
100% × output current 50%] and the point (B) [output voltage 50% × output current 100%].
The current output capacity of this unit should be over two times of load capacity.
30
Kanthal
Molybdenum
Tungsten
100 1500 2000 2500
]
Y-FB
Deterioration
1000 1500
Input signal(%)
0 25 50
100
80
60
40
20
0
0 20 40 60
Output current(%)
8 12 16 20mA
100
80
60
40
20
0
0 20 40 60
Output current(%)
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