Use third mode
Open collector output connection to a separate relay from the concentrator module
The main problem of the first connection mode described above, is that the relay is always
active, increasing the absorption, per device, of about 20mA (depending on the type of relay
connected). To resolve this problem just use, in addition to the relay, some components easy
to find and use.
R1:
Resistor 470ohm 1/4W 5%
R2:
Resistor 15Kohm 1/4W 5%
T1:
Transistor NPN as BC337B
D1:
Diode as 1N4007
Relè:
Relay with 12V DC coil
With this mode of connection, the relay will be activated only in case of power off or locking of
device operation.
Note
: In the operation of the concentrator on BUS, all these reports are made
a
utomatically
by the central management ALM-6800. This connection is used only for stand-alone mode.
Installation and Programming Manual V1.2
15
