The Signal port is used to tell the Access Control board if the door
is open or closed. This is important because when you enter or exit a door
the locks will reengage even if the door is still open. If you want to know this
information or have an alarm go off for having the door open for an extended
period of time this port will allow you to do so.
S1
GRD
NC
S1
GRD
• S1
: This port is what
you will connect your
signal wire to. If you
have a choice between
NO and NC, you will
want to choose
NC
because the door is
normally closed and
you want to know when
it is open. The example
to the right shows a
simple door contact
you would use on an
alarm system to help
indicate if the door is
open. You will need to
run one for each door
and put them in the
correct “S” port.
The example to the left is
using a Strike that has the
door signal built in. This
is seen in more expensive
models and is located
typically in the middle of
the strike plate. There are
usually 3 wires with the first
being
COM
. This cable you
will connect to the GRD
port. The other 2 cables will
be
NO
&
NC
. As explained
above you will use
NC
.
• GRD
: This port is where you would connect the COM or
negative side of the contact. With the example above it
does not matter what cable you use because you are just
trying to complete the circuit. You can also connect to the
GRD
cable powering the strike as this is the same ground.
This will cut down on the amount of cable needed.
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