Smc-networks EX500 Manuel d'utilisateur télécharger pdf (Page 4)

EX500 Serial System EX## - OME0008

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・Safety instructions for power supply

1. Whether you use a single power supply or a dual power supply, two power lines have to be supplied

at all times ( for solenoid valve and for input and control ).

2. Choose UL recognized product for direct current power source to be mounted.

( 1 ) Limited voltage / current circuit complying with UL508

The power supply circuit made with the secondary winding of an isolating type transformer which satisfies

the following condition.

･ Max. voltage ( No load applied ) : 30Vrms ( 42.4V peak ) or less, and

･ Max. current : 8A or less ( Including a short circuit ), and restricted by the circuit protective device or

a fuse with rating in the table below

Open circuit volts ( V peak ) Amperes

0 to 20 [ V ] 5.0

Over 20 [ V ] to 30 [ V ]

100

V *

* “ V ” is defined as the peak open circuit voltage.

( 2 ) Max. 30Vrms ( 42.4V peak ) or less circuit ( Class 2 circuit ) which is supplied by an isolating source

that complies with the requirements in the Standard for Class 2 Power Units, UL1310 or for Class 2

Transformers, UL1585.

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！ CAUTION

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Smc-networks EX500 Manuel d'utilisateur Page 4