Radio Engineering Industries Digital BUS-WATCH R1001 Manuel d'utilisateur Page 70

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Automation Technologies
AC110V
AC230V
DC24V
DC24V
AC110V
AC230V
AC380V
IN
OUT
IN
OUT
IN OUT
R500
R900
R1800
R500
R900
R910
R1800
Relay Interfaces
Optocoupler modules
Applications
All the electrical signals from/to sensors/actuators must be adapted to the PLC's electrical level.
It is the first function of the relay or optocoupler interfaces.
Secund function of the relay and optocoupler interfaces is electrical isolation between sensors/actuators and the PLC.
An optocoupler is used as input interface. It is a function of
insulation and adaptation.
A relay is used as output interface. It is voltage adaptation and it
allows more power. The power optocoupler is used when the
number of operations is important.
Pushbutton
Position switch
Sensor
Optocoupler
Relay or
Optocoupler
PLC
Motor
contactor
Motor
Optocoupler
PLC
Relay or
optocoupler
PLC
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