Installation Manual

Versus Technology, Inc.
DT10000-A0001 8 Revision 8 December 1998
3.2 Collector Network Length Limitations
There must be no more than six (6) collectors on any one concentrator as shown in the RS-485 loop display
below. The total length of the collector network must not be more than 4000 feet. See Figure 3-2 for a visual
representation.
Figure 3-2
3.3 Sensor Connection Length Limitations
The single pair sensor connections may be up to 1000 feet in length. If the environment is known to be
electrically "noisy,” consider shorter line lengths to assure stronger signals and more immunity to interference.
3.4 Location of Collectors, and Concentrators
When planning an installation, it is important to locate a proper place for the concentrators and collectors. In
smaller installations, these items may all be located at the same place in a telephone or utility closet. Be sure
that the location selected has easy access for servicing, but that it can be secured against tampering by
unauthorized personnel.
The concentrator should be mounted in a central location to the collector(s) to minimize the lengths of collector
network runs. Many installations will find the concentrator simply mounted adjacent to the first collector.
Collectors should be mounted in similar telephone or service areas such that they are near the sensory networks
they service. Of course, be sure that the locations selected are free from extremes of heat, cold, and moisture as
with any electronic equipment.
NOTE:
The total length of an Ethernet network must be no more than 3000 feet. Consult the
Ethernet manual for more information on installation procedures.