PMX_MULTI
User’s Manual
15
Installation | Load Considerations
Loads with accumulated energy
Connecting a load with accumulated energy, such as a battery, to the product may cause current to flow
from the load to the internal circuit of the product. This current may damage the product or reduce the life
of the load.
For this type of load, connect a reverse-current-prevention diode (D
RP
) between the product and the load
in series as shown in the following figure.
This cannot be used in conjunction with remote sensing.
Sink current from an external voltage source
The current varies depending on the voltage of the external voltage source.
The sink current is reduced at a low output terminal voltage. Hardly any sink current flows near 0 V.
The sink current indicated here is the value obtained when an external voltage with the same value as the
rated voltage is connected.
Sink current (TYP)
PMX
Load with accumulated energy
D
RP
: Reverse-current-protection diode
D
RP
CAUTION
• To protect the load and the product, use a D
RP
that conforms to the following specifica-
tions.
Reverse voltage withstand capacity: At least twice the rated output voltage of the
product.
Forward current capacity: 3 to 10 times the rated output current of the product.
A diode with small loss.
• Be sure to take into account the heat generated by D
RP
. D
RP
will burn out with inadequate
heat dissipation.
Model
CH1
CH2
CH3
CH4
PMX32-3DU
43 mA
43 mA
−
−
PMX32-3TR
43 mA
43 mA
27 mA
−
PMX32-2QU
43 mA
43 mA
36 mA
36 mA
