G4S S843 Installation And User Instructions

Installation and User Instructions for S843 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).

! A cable from a Remote Interface Module 

(RIM), if used. A RIM can reduce cable 

lengths to door furniture.

The optional heater kit 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).

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

Ensure no jumpers are fitted across LK3 (NODE TERM), LK4 (HGU TERM) and LK2 (TEST). If a jumper 

is provided, park it across one pin only. LK1 (USER FB) - set to 1 for sound on and 0 for sound off.

The S843 is a 

keypad, which uses 

p

. The S843 is able to read Philips  MIFARE  

and Philips MIFARE DESfire smart cards. 

For either type of card, the S843 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.

contactless smart-card reader, with LCD and 

20mA current loop  seudo-random 

®

®

communications

Fit the Weatherproofing Kit

1

Mount the Backplate

2

Reader Links

3