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Installation and User Instructions for S849 Readers

You should find that the 
backplate has holes for 
connection to most 
standard electrical 
backboxes.

With the backplate off (see above), mount 
the backplate adjacent to the opening edge 
of the door and at a convenient height. Feed 
the required cables through the backplate:

·

The cable from the controller.

·

The cable from the heater, if used (must 
be a separate cable).

2

The optional heater kit (

not evaluated by UL

maintains the reader at the correct temperature 
when mounted outside. With the backplate off, 
remove the backing paper from the two 
elements, then stick them to the inner sides of 
the reader. The heaters must be connected to a 
24V AC supply (min 25VA).

For UL listed applications, use only manufacturer 
provided gasket, P/N 4000-4117

When mounting outside, the two-part gasket kit 
must be fitted:

a) Remove the backplate from the reader by 

releasing the two securing screws.

b) Remove the cutouts and backing paper 

from the two gaskets, then stick them to the 
backplate as shown.

Outer gasket

Inner 
gasket

Backplate 
securing screws

Backplate

1

Fit the Weatherproofing Kit 

Mount the Backplate

The S849 is a contactless smart-card reader with keypad. 

®

The S849 is able to read ISO14443 type A, Philips  

®

MIFARE  Classic, MIFARE Ultra Light and MIFARE DESfire 
smart cards, and provides the option to use Wiegand or 
20mA current loop pseudo-random communications.

For either type of card, the S849 supports the use of 
unencoded cards (where only the unique card serial number 
is read), or cards encoded with a card number. Several 
encoding formats are supported.

The reader can simultaneously support two different card 
types/formats (e.g. non-encoded MIFARE and smartMAX-
encoded MIFARE DESfire, or non-encoded MIFARE and 
smartMAX-encoded MIFARE). The reader is automatically 
configured to accept the first two card types/formats 
presented.

Only DES-CARD and DES-CARD-W/MAG DESfire 32K bit 
smart cards have been evaluated for UL294.

For additional information regarding the installation, 
configuration and proper use of this product:

SMS User Guide, P/N 9600-0429, M2150 Access Control 
Design Guide.

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