AQ-C
ACCESSORY
Socket
PC1A-PS
NOTES
When used for the load less than rated
In the case of the load current less than
In case the dummy resistor is not used,
keep in mind that the residual voltage
? Characteristics of residual voltage
vs. load impedance (AC output)
rated, malfunction may result from the
residual voltage across the both ends of
the load even if the solid state relay is
turned off.
becomes as follows:
Example:
For the inductive load by the 5 mA load
current and the 200 V AC load voltage,
100
80
f = 60 Hz
Ve: Residual voltage
V: Power voltage
× 100,%
Use a dummy resistor as a
countermeasure.
The total of the current through the
the load impedance becomes 40 k ? and
Ve/V = 16% is estimated from the below
graph.
Ve
V
60
1
SSR
2
Load
Ve
V
resistor and the load current must exceed
the min. rated load current.
Accordingly, the 32 V voltage remains
across the both ends of the load when
40
R 0 (Dummy resistor)
the solid state relay is turned off.
20
Power factor: 1
(resistive load)
(+) Load
Load power source
8
0
20
40
Power factor: 0.4
(inductive load)
60 80 100
Load impedance, k ?
(–)
5
1
16
Input power source
– +
For Cautions for Use.
ASCTB214E 201201-T1
Panasonic Corporation
Automation Controls Business Unit
industrial.panasonic.com/ac/e/
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