NT132 System Overview
16
750.001.003
Revised June 1999
© 1999 AXCESS
TM
Inc.
Reader
The Reader (Figure 4) originates the signal that is broadcast to wake
the Tag. The Reader has the following purposes:
•
Encode a transmission wake-up signal and transmit it via the
antenna to the sleeping Tag.
•
Decode the signal from the Tag via the receiving antenna. The
Reader will convert the data to a format usable by a computer or
Wiegand control panel for further processing of the information.
•
Output data to a control device or a computer.
Figure 4 AXCESS Reader – external view
Types of Readers
Serial
This Reader communicates using the EIA-232 standard, more
commonly known as RS-232C. It can connect to a communications
port on a computer or any device that can accept RS-232C data.
Wiegand
Wiegand Readers output Security Industry Association (SIA) 26-bit
data to Wiegand control panels. It connects to the Wiegand control
panel by three wires – Data One, Data Zero and Ground.
Free Topology Transceiver (FTT)
FTT Readers can be used to create networks of Readers. They
communicate with a computer using Echelon LonWorks
TM
and can
control external devices via TTL controls.