G4S S849 Installation And User Instructions

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.