Protective Circuit For Inductive Loads; Protective Circuit For Capacitive Loads - Panasonic FPS Series User Manual

Installation and Wiring

6.4.2.1 Protective Circuit for Inductive Loads

With an inductive load, a protective circuit should be installed in parallel with the load.
When switching DC inductive loads with the relay output type, be sure to connect a diode
across the ends of the load.
Using an AC inductive load (relay output type)
1
COM
1
COM
Using a DC inductive load
1
COM

6.4.2.2 Protective Circuit for Capacitive Loads

When connecting loads with large in-rush currents, connect a protection circuit as shown
below to minimize their effect.
1
COM
86
3
C
R
2
3
2
3
2
3
2
A
FPΣ
Output terminal
1
Load
2
Surge absorber, e.g. resistance R: 50Ω,
3
capacitance C: 0.47μF
A
FPΣ
Output terminal
1
Load
2
Varistor
3
A
FPΣ
Output terminal
1
Load
2
Diode; reverse voltage (V
average rectified forward current (I
3
or more
A
FPΣ
Output terminal
1
Load
2
Resistor
3
FPΣ User's Manual
): 3 × load voltage,
R
): ≥ load current
0