2 / 7 P/N 466-5444 • REV A • 8NOV18
Wiring
This section provides examples of different wiring options.
The options are all shown in the failsafe mode.
Basic Hook-up
Figure 4 shows the basic hook-up for the RCR-REX, a
power supply and a magnetic lock. When the sensor sees
motion, power is removed from the magnetic lock.
Figure 4: Basic hook-up
CAUTION: For DC powered systems, if the door lock does not
contain a diode across the coil winding, install a diode
across the door lock to prevent degradation of the lock
relay contacts. The diode should have a current rating
greater than the maximum lock current. Install the
diode so that the cathode end with the bar is
connected to the positive side of the coil.
Spike Protection
Many magnetic locks and electric door strikes have built in
spike (diode) protection. If the lock is not spike protected,
install a bridge rectifier, such as a KBL005, between the
relay contacts and the magnetic lock/door strike as shown in
Figure 5.
Figure 5: Spike Protection
Note: Failure to spike protect the sensor may result in shortening
the life of the relay contacts.
RCR-REX and a Keycard Reader
Figure 6 shows the wiring normally used when a keycard
reader is on one side of the door and the RCR-REX is on the
other side of the door. Both swiping a keycard or the
detection of motion by the RCR-REX will remove power from
the magnetic lock.
Figure 6: RCR-REX and a keycard reader
Monitor Door Contacts (first option)
In the monitor door contacts mode, a person entering the
sensor’s field of view will activate the relay and timer. Door
contacts connected to terminal D will monitor if the door is
open or closed. If the relay timer gets to ten seconds or less
(if set for 16 seconds or greater) and the door is still open,
the RCR-REX internal sounder will activate. The sounder will
also active if the door is opened without first activating the
sensor or keycard input. The sounder will remain on until the
door is closed or by someone moving in the field of view
(Figure 7).
Figure 7: Monitor door contacts (first option)
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