Keri Systems SM-2000 - Manual (Page 6)

IntelliProx – SM-2000
2305 Bering Drive 01830-003 Rev. H
San Jose, CA 95131 USA
(800) 260-5265 (408) 435-8400 FAX (408) 577-1792
Web: www.kerisys.com E-mail: [email protected]
Page 6 of 10
Quick S
tart Guide
IntelliPr
o
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7.0 Lock Connection Options
When installing a door lock there are two things to consider: safety versus security, or should the door lock be "fail-
safe" or "fail-secure”.
7.1 Fail-Safe Door Lock
Fail-safe means that if the power should fail at a door (perhaps due to a power outage or equipment failure), the door
will automatically unlock allowing entrance or egress. Power is required to keep the door locked. A fail-safe door
ensures people will be able to enter and exit through that door in the case of an emergency. A typical fail-safe
application may use a magnetic lock. In this application, the controller energizes the lock relay causing the lock relay to
open, breaking the power to the magnetic lock, and allowing the door to be opened. Refer to Figure 4 for a sample
wiring diagram.
NOTE: DO NOT share the 24VDC Lock Power Supply with the IntelliProx unit.
Figure 4: Sample Fail-Safe Wiring Diagrams
7.2 Fail-Secure Door Lock
Fail-secure means that if the power should fail at a door (perhaps due to a power outage or equipment failure), the door
will automatically lock and not allow entrance but can continue to allow egress if a mechanical override device is
present. Power is required to unlock the door. A fail-secure door ensures a secure area remains secure regardless of the
situation. A typical fail-secure application may use a door strike. In this application, the controller energizes the lock
relay, causing the lock relay to close, providing power to the release mechanism on the door strike, and allowing the
door to be opened. Refer to Figure 5 for a sample wiring diagram.
NOTE: DO NOT share the 24VDC Lock Power Supply with the IntelliProx unit.
Figure 5: Sample Fail-Secure Wiring Diagrams