Symmetry™ S821
Contactless Smart Card Wall Switch Reader
The Symmetry S821 is designed for mounting on most standard electrical backboxes for ease
of installation.
The Symmetry S821 Contactless Smart Card Reader is able to read both Texas Instruments™
(ISO 15693) smart cards, and the card serial number on Philips® MIFARE® smart cards.
For either type of card, the Symmetry S821 supports the use of unencoded cards (where only
the unique card serial number is read).
In the case of Texas Instruments (TI) cards,
an encoded card number can be read. Encoding formats supported include TI’s
own formats and our own “smartMAX” format.
The Symmetry S821 can be connected to the multinode range of controllers and is compatible with Business, Professional,
Enterprise and Global Software at Version 6.0.2 and later.
Unlike Wiegand interface readers, the Symmetry S821 uses secure, bi-directional, Pseudo-
Random supervised communications between the multiNODE controllers and their associated
readers. An alarm will sound if communications are lost.
A distance from any of the multiNODE controllers to the Symmetry S821 reader of up to 3000ft
(1000m) can also be achieved.
The Symmetry S821 has a maximum read range of up to 3” (75mm).
Other key reader features include LEDs for visual indication of card accepted or
card rejected and an integrated buzzer for card read and door pre-held warning.
The Symmetry S821 Wall Switch Contactless Smart Card Reader is very cost effective and comes
with exceptional reliability and consistent read range characteristics.
The Symmetry S821 has fully potted electronics and is ideal for both outdoor and indoor use
and is warranted against defects in workmanship for life (see our warranty policy
for details).
Key Features:
- Designed to fit most standard electrical back boxes
- Reads both TI (ISO
15693) smart cards, and the card serial number
on Philips MIFARE smart cards
- Maximum read range of up to 3” (75mm)
- Visual indication via LEDs for card accepted and card rejected
- Integrated buzzer for confirmation of card read and door pre-held warning
- Secure, bi-directional, Pseudo-Random supervised communications
- Rugged polycarbonate design with potted electronics ideal for both outdoor and
indoor applications
- Lifetime warranty