Situation 1: Circuit with an inductive load
A: Communication module
B: Flyback diode
C: Relay
D: External power supply (DC)
A relay is connected to OUTx. The relay is connected to
an external power source.
The fact that a relay is an inductive load means that
the relay coil has to be equipped with a flyback diode.
When you want to switch
inductive loads
like
magnets, relays, coils, etc.
always use a
flyback diode
directly on the load. The device
may be damaged if no flyback diode has been
used, or if it was connected falsely!
Situation 2: Circuit with an input
A: Communication module
B: Device with an input
OUTx is directly connected to the input of another
device. The input has to meet the following conditions:
l
Input current max. 150mA
l
Voltage, measured between IN and GND, max.
28V
l
Internal pull-up resistor, or an external pull-up
resistor can be connected
l
The entry is low-active (if not, the device must
be able to invert its status)
Page 20 of 37
CESeasy communication module
7 Connections
