User guide

 User Guide
Page 98
Install  RX with Tamper Circuit and External Resistors
B. Install  RX with Tamper Circuit and
External Resistors 

 RX supports tamper detection (DEOL and SEOL) 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 1.2k (shown as below), whereas the
circuit is in normal open condition if the resistance between point A and B (shown as below)
detects 7.2k.The resistance transition from 1.2k to 7.2k 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 diagram. The circuit debouncing time between each sensor is 20 millisecond.
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 ALARM Sensor drive output close (point B and
C)
HiZ NORMAL Sensor drive output open (point B and
C)
O/C TAMPER Wire open (point A and B)
wire
sensor
drive
output
A
B
C
wire
sensor
drive
output
A
B
C
R1.2K
R6K
R1.2K
R6K