Glossary Of Terms; Doc 6001536, Rev C - Sentex EM3000 Installation Instructions Manual

Glossary of Terms

Address-
Diode-
Door Left Open Too Long-
Door Forced Open-
Door Status Contact-
Normally Open (N.O.)-
Normally Closed (N.C.)-
PIR- Passive InfraRed detector-
REX- Request to Exit-
Transorb-
Each EMC in a multi-unit configuration must be assigned a unique
number via its Address DIP switch (SW1). Similar to a street
address for homes, the EMC number is the address unit. In the
EMWin, the first EMC is addressed as unit 1.
A semi-conductor "one way valve" that is used to protect the EMC
from power transients caused by D.C. operated door strikes or
maglocks. The diode needs to be installed at the strike or maglock.
The diode is polarized, so care must be taken to ensure that it is
installed correctly. Refer to Figure 15 through Figure 17 on pages 18
and 19.
Door is left open beyond the Door Access Time after a valid opening
by card or REX. A Door Status Contact must be installed for
reporting this condition.
Door is illegally opened without card or REX. A Door Status Contact
must be installed for reporting this condition.
Usually a magnetic contact device (N.C.) used to provide the status
of the door (e.g., closed or open).
A device is considered N.O. if the "normal" condition of the circuit is
not completed or in the "open" state. For N.O. push buttons, pushing
the button completes or "Closes" the circuit. For N.O. Door Strikes,
the N.O. condition will "lock" the door. When the circuit is closed, the
door will unlock.
A device is considered N.C. if the "normal" condition of the circuit is
completed or in the "Closed" state. For alarm devices, the "normal"
condition is the completed or closed circuit. When the circuit is open,
it can become an alarm. For N.C. Door Strikes, the N.C. state is that
the strike will remain locked. The lock will unlock in the N.O. state.
A device to detect body heat and produce a N.O. and/or N.C. output.
Used for automatic exit devices and motion detectors. Requires an
external power source (available in 12 VDC or 24 VDC).
A device used to provide exit out of a protected door without causing
an alarm. A REX device for EMC must be a N.O. device.
A device that protects the EMC from power transients potentially
caused by static or some door strikes. The EMC is built with
transorbs for added protection; however, transients from a door
strike need to be stopped at the strike itself. The supplied transorbs
need to be installed at the door strike.
Glossary of Terms

Doc 6001536, Rev C

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