Installation
page
To connect an external device
1 Insert the 3.5mm jack plug
of the cable leading from
the external device, into the
link port socket on the far
left of the Burnside unit’s
rear panel.
Connecting to external devices
The Burnside unit features a link port which allows it to connect to
external devices and either send, or respond to, switched signals.
Responding to an input
The unit can react to a
received
input
signal (for
instance from an alarm sys-
tem, a simple door switch,
etc.) and, in response, send
out a pre-prepared SMS
text message warning to a
specific mobile number.
Switching an output
When a specially format-
ted SMS text message is
received, the Burnside unit
can generate a switched
output
signal to trigger an
external device.
External
device
Signal
input
Pre-prepared
text
message
BURNSI
DE
Bur
nsi
de
Tel
eco
m
External
device
Signal
output
Text
message
with
command
BURNSIDE
Bur
nsi
de
Tel
eco
m
Phone
Jack tip -
Circuit
Jack ring -
Circuit 2
Jack sleeve -
Ground
To wire the jack plug
Use a three way 3.5mm jack plug, wired as follows, to gain access
to both input/output circuits of the link port:
•
Circuit
can operate either as an input into the Burnside unit or
as an output from it, depending on how the unit is programmed
(using
0#54120
Using the input/output channels
for details).
When set as an input, Circuit 1 responds to a high voltage of 2.4
to 5V and a low voltage of 0 to 0.8V.
When set as an output. Circuit 1 uses open collector switch-
ing which is suitable for providing a logic signal or driving a low
power relay providing the latter has an external power source as
well as suitable back-EMF protection to prevent damage to the
unit’s circuitry.
•
Circuit 2
is fixed as an input to the Burnside unit.
Circuit 2 can sense and report nine distinct voltage levels, ranging
from 0.5V to 4.5V in 0.5V steps.
Using menu commands you can configure various aspects of both
circuits. See
