Comander Perimeter Security System
Engineering and Installation Manual
Page 16 of 72
1.8.3 Connecting to Legacy Equipment
It is often impractical to replace an existing, fully-connected system based on serial
data links and long runs of feeder cables with an entirely new Ethernet-based system.
Ideally, existing equipment and cabling should be integrated into the new system.
For example, on the same site used in the previous scenario, we might have an
additional internal perimeter in the south-eastern corner of the site which is already
alarmed and protected by a Geoquip MicrAlert device. MicrAlert, like Comander, is a
controller and annunciator for Interceptor sensor cable, but much more limited - it can
handle only four perimeter segments, (having four cable sensor inputs and four
Monitored Contact inputs for the Terminator Box Tamper switches), and does not
normally provide an audio output from the Interceptor cable. Standard MicrAlert units
communicate with other devices via an RS232 serial data link.
Nevertheless, if the system is working well there is no need to replace it – instead, it
can be connected to the Comander system on the main site via its RS232 connection,
and its circuits can then be annunciated to the SMS by a Comander. The diagram
below shows part of such a system:
Marshalling Box
Marshalling Box
Rack
IP 10.2.3.101
Rack
IP 10.2.3.102
C
C
T
V
C
C
T
V
C
C
T
V
C
C
T
V
Rack
IP 10.2.3.100
Control Room
Geolog Vision
10.2.3.200
Audio
Camera Matrix
10.2.100.200
N
CAT5e Ethernet
Fibre Ethernet
RS232
MicrAlert
KEY
COM1
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