Westermo TD-36 - Manual (Page 42)

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Alarm
system
Alarm
output
I/O
Input
5 − 48 V
Acknowlidge
output
TD-36 485
5
6
7
8
9
IDW-90
Acknowledge
Button
Alarm
Bell
5 − 48 V
I/O
Input
5
6
7
8
9
… Remote output and transparent mode
In this application the TD-36 485 I/O is used to send a SMS and then make a transpar-
ent I/O connection. The transparent I/O is in this example set up to an IDW-90 ISDN
modem, but can be any of the Westermo remote products supporting Generic I/O (IDW-
90 or TD-36 485).
The TD-36 485 has a alarm signal connected to it’s I/O-input, when this input is activated
by the external alarm contact an SMS defined by Entry 1 in the entry list is sent. When
the SMS is transferred Entry 2 is programmed to be trigged. Entry 2 is programmed to
set up a Transparent I/O connection to an ISDN-modem IDW-90. The status of the alarm
signal will be transferred to the remote IDW-90 and activate an Alarm bell. At this time
the SMS should be available on the operators mobile showing the reason for the alarm.
The operator can acknowledge the alarm, the acknowledge signal will now be transferred
back to the originating TD-36 485 and alarm system. The alarm system will deactivate the
alarm output causing the remote alarm bell to stop sounding. The Transparent I/O con-
nection will be terminated by a programmed timeout.
GSM
Network
PSTN
Network
ISDN
Network
Alarm output
SMS Sending
Connection
Alarm Bell
Timeout
Timeout
retrigger
Timeout
retrigger
Timeout