User's Manual

ALC LF BUS Beacon – Installation Guide
www.elpas.com
Page 6 of 12
V2/Dec 2014
General Purpose Inputs
The beacons have two digital inputs (can be selected as a
Wiegand output). The beacons also include two general purpose
dry contact analog inputs (N.O.) for monitoring alert sensors or
emergency call buttons. They are designated as IN1 and IN2
(can be set as open-collector- output2).
EOL supervision may be added to either of these inputs to detect:
Open, Close, Line Cut, and Line Short circuit conditions using
optional Elpas End-of-Line Terminators (P/N: 5-IOX00001).
Recommended Cable: 22 AWG, unshielded/twisted pair.
Transmission Suppression Option
Input1 on all BUS Beacons may be used to disable the LF field by
shorting IN1 with GND. This allows the user to temporarily
override the beacon with a security detector, such as a door
position reed switch, which can disable the LF field as long as the
door is shut.
However IN1 can be used as a normal general purpose input
when an Elpas End-of-Line Terminator, (P/N: 5-IOX00001) is
connected to the input as illustrated in the above section.
Open-Collector Output
Both the primary beacon and the secondary beacon have two
open-collector outputs (up to 100mA, 28VDC) for actuating alert
response devices.
Note: The output is resistive loading only, there is no power factor.
Recommended Cable: 22 AWG, unshielded/twisted pair
Wiegand Output
ALC beacons provide a 26-bit Wiegand output, consisting of two
ports WD0 and WD1 (it may be enabled instead of the digital
inputs using the DIP switch) for sending Elpas tag IDs to third-
party access control panels.
Recommended Cable: 22 AWG, unshielded/twisted pair