TeleEye RX800 Series, User Manual Lite

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4.4.2. Install Tamper Circuit and External Resistors
TeleEye RX supports tamper detection on all alarm inputs including arm/disarm input, security switch
input, system tamper and power failure input.
DEOL : Dual End of Line termination with NC and NO connection
SEOL : Single End of Line termination with NC and NO connection
NC/NO : Alarm and other input ports without tamper detection circuit connection
For example: By connecting the tamper circuit with DEOL, the circuit is in the normal close condition if
the resistance between point A and B detects 1.2kΩ (shown as below), whereas the circuit is in normal
open condition if the resistance between point A and B detects 7.2kΩ. The resistance transition from
1.2kΩ to 7.2kΩ is generated by an alarm tamper event for normal close circuit. The setup configuration of
those alarms and input ports are shown in the following diagrams. The circuit debouncing time between
each sensor is 20 milliseconds.
Dual End of Line Configuration
Normal Close (NC)
Normal Open (NO)
Term Status Description
S/C Tamper Wire short (point A and B)
LoZ Normal Sensor drive output close
(point B and C)
HiZ Alarm Sensor drive output open
(point B and C)
O/C Tamper Wire open (point A and B)
Term Status Description
S/C Tamper Wire short (point A and B)
LoZ Normal Sensor drive output close
(point B and C)
HiZ Alarm Sensor drive output open
(point B and C)
O/C Tamper Wire open (point A and B)