User's Manual

TD 93021US Rev A
10 FEB 2014 / Ver A 138
Installation Guide
teleCARE IP
8.3.4 NILF Low Frequency Beacon
The low frequency beacon NILF is contained in a white plastic enclosure with a slim design that is
suitable for surface mounting on walls or at a door post. The NILF is powered by three 1.5V “C” (R14)
alkaline batteries. In situations where battery power is not suitable a 24Vdc external power supply can
be used.
An optional transceiver module NIRX can be mounted on the NILF circuit board used to monitor the
NILF through a heartbeat signal, The NIRX will send out a tamper alarm upon front cover removal
detection or send a low battery alarm.
Figure 189. NILF - Low Frequency Beacon
The NILF operates at 125 kHz producing a spherical magnetic field with a range of up to 6.5 feet (2
meters) when battery powered or 10 feet (3 meters) when powered from an auxiliary 24Vdc power
supply. The magnetic field strength can be adjusted to suit the requirements. A master/slave
configuration can be used to extend the range of the LF field.
DIP switches are used to set the 12bit ID code, to select the transmission rate allowing a suitable
interval between 0.1 - 2s and to set the output power, ranging from 0.30m to 3m.