User's Manual

10 Versus Technology, Inc.
3.2.1 Collector Network Length Limitations
There must be no more than four collectors on any one concentrator as shown in the RS-485 loop
display below. Collectors should not be placed more than 1000 feet apart. The total length of the
collector network (from the Concentrator to the last Collector in the chain) must not be more than 3000
feet.
3.3 Sensor Location Planning
One of the most important steps in an installation involves planning the sensor locations. A complete
understanding of sensors and badges is very helpful in designing an effective system. There are several
things to consider when planning the sensor locations.
IR Sensor RF Sensor
3.3.1 Sensor Connection Length Limitations
The sensor wire runs can be up to 1000 feet in length from the Collector to the sensor. If the
environment is known to be electrically "noisy,” consider shorter line lengths for stronger signals and
immunity to interference.
3.3.2 Infrared (IR) Sensor Location Planning
3.3.2.1 IR Sensor "field-of-view"
If an IR sensor is placed in a room with obstacles and reflections eliminated, the field of view of the
sensor appears in the shape of six overlapping lobes forming a 15-foot radius.
Top view of sensors in a hallway