User's Manual
LF BUS Beacon – Installation Guide
www.elpas.com
Page 5 of 7
V22/Jan 2013
LF Field Adjustment
The size of the LF field generated by any of the BUS Beacons can be adjusted using the device’s Front Cover Tamper Switch to control the
actual coverage of the LF field and to reduce the unwanted signal penetration
For Primary Beacons: Primary Beacons support four ranges from10cm/4.0 inches to 1.5m/5ft in radius.
To cycle to the next range press the tamper switch twice.
Each time you cycle to the next LF field range, the Orange LED will flash the applicable number of times
to indicate the selected range:
One flash - Shortest range
Two flashes - Medium 1 range
Three flashes - Medium 2 range
Four flashes - Maximum range
For Secondary Beacons: Secondary Beacons support only the Medium 2 and Maximum Ranges. To cycle between the two ranges press the
tamper switch twice. There will be no LED indication of the selected field range.
NOTE: In practice the coverage area (for each range mode) regardless of beacon type may vary +/- 20% by specific Active RFID Tag as well as
the active RFID Tag’s physical orientation in relation to the LF field.
Single Door Placement
Mount the primary beacon on the wall adjacent to the opening
side of the door, at a height of 1.2m/4Ft. above the floor.
Beacons MUST NOT BE MOUNTED on any metallic surfaces
and should be positioned at least 30cm/12in from any metal
barriers (such as signs/pillars/beams) in any direction
Additionally all beacons MUST BE MOUNTED as far away as
possible from all other pieces of equipment that may emit
magnetic fields (such as large electrical motors, HVAC and
refrigeration compressors.
Double Door Placement
A primary/secondary configuration may be installed by mounting the primary beacon to the right of the double door entrance area and
up to three secondary device(s) to the left of the doors, at a height of 1.2m/4Ft above the floor Ensure that all of the beacons are no
more than 1m/3ft from the doors. The resulting LF fields are automatically synchronized in real time to avoid problems associated with
coverage area overlap.