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Installation and User Instructions for S844 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.

2

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

1

Fit the Weatherproofing Kit 

Mount the Backplate

Set LK1 (USER FB) to 1 for sound on, or 0 for sound off. If a jumper is provided for LK2 (TEST), park it 
across one pin only. Set LK3 (COMMS) across the center and WGD pin for Wiegand communications, or 
across the center and C/L pin for 20mA current loop communications.

3

Reader Links

The S844 is a 
keypad. The reader can be set to use Wiegand or 

p

The S844 is able to read Personal Identity Verification (PIV II) 
type A and B, Philips MIFARE and Philips MIFARE DESfire 
smart cards. For Philips MIFARE and Philips MIFARE DESfire 
cards, the S844 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 
after power is applied.

Note:

 For PIV II compliance, Wiegand communications should 

be used.

contactless smart-card reader, with LCD and 

20mA 

current loop  seudo-random communications.

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