Keri Systems KWX-2.4 - Manual (Page 2)

KWX - 2.4 GHz Wireless 485 Network Transceiver
Quick Start Guide
Page 2 of 14 P/N: 01949-002 Rev. A
1.0 System Components
KWX Units
KWX units can be connected to any point in an RS-485 network line; one unit per network line. One
unit, connected to the network line with the master controller, must be mounted in a central location
that allows all other KWX units (connected to individual controller network spur lines) to
communicate with this central unit. All wireless units have an integrated omni-directional antenna
providing a “doughnut-shaped” coverage pattern (see Figure 10 on page 13).
NOTE: For proper operation between master controller and KWX unit, the master controller must be
a PXL-500 with firmware version 8.4.20 or greater. Entraguard controllers cannot be the master
controller.
Long-Range Antennas
The KWX unit is shipped with a unity gain “rubber-ducky” antenna. This antenna is mounted directly
onto the unit, and is not designed to be removed and relocated. Three optional antennas are available
for applications requiring separate antenna mounting or communication over longer distances. 1.8
meter (six foot) extention cables are available for these optional antennas, providing greater
flexibility in mounting location. These cables are specifically manufactured to minimize the amount
of signal loss over the length of the cable.
NOTE: Please contact Keri Systems if a cable length greater than 1.8 meters is required.
Unity Gain, Omnidirectional – Recommended for use in areas where it is not practical to mount the
KWX unit itself (i.e. outdoors, restricted space locations). Being omnidirectional, this antenna has the
same coverage pattern as the standard, rubber-ducky antenna (see Figure 10 on page 13).
6 db Gain, Omnidirectional – Increases the coverage area of a KWX unit by approximately 25%
(increasing to approximately 69 meters - 225 feet). When properly mounted, this antenna can help
resolve fringe-area coverage problems. Being omnidirectional, this antenna has the same coverage
pattern as the standard, rubber-ducky antenna, but with increased coverage in all directions (see
Figure 10 on page 13).
13.9 db Gain, Directional Yagi – Intended for use in outdoor, point-to-point applications such as
between distant buildings. The coverage distance is approximately twice that of the rubber-ducky –
110 meters (360 feet) using one Yagi antenna (with the Yagi antenna at the remote site) and up to 200
meters (650 feet) with Yagi antennas used at both ends. However, the coverage area is limited to a
very narrow, line-of-sight, antenna-to-antenna pattern (see Figure 11 on page 13). A Yagi antenna
cannot be used as a general replacement for the standard, rubber-ducky antenna.
When considering an optional antenna, please contact Keri headquarters with your requirements so
we can help match the proper antenna with your needs.