Step 3: Access Control Overview
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Doc 6001536, Rev C
Readers
Readers should always be less than 500 feet
from the EMC.
Sentex recommends that you place your reader
between 36-48” (90cm-120cm) from the floor,
though installation should conform to the local, city,
county and state installation codes.
Figure 4: Reader Installation
Door Strike, Door Status Sensors, PIRs and REXs
Like the reader and the door lock, the door status
sensor and REX must be positioned within 500 feet of
EMC.
The door sense is most often placed at the top of the
door in order to “sense” the position of the door (open,
closed, forced).
The PIR or the REX are placed on the opposite side of the
wall and allows people to exit the room or hall. The PIR is
used for automatic exit procedures or motion-detectors,
while the REX is used for manual exits.
SUPERVISED DOOR SENSE AND REX INPUTS
Sentex Systems recommends installing “supervised”
Door Sense and REX inputs. Supervised inputs allow
the system to monitor when Door Sense or REX wires
have been shorted or cut (see also
For installing supervised Door Sense and REX
inputs, refer to Figure 12 (page 16) and Figure
13 (page 17).
Figure 5: Door Strikes, Status Sensors,
PIRs and REXs
