28 Installation
Anti-intrusion control panels
3-5-2
Single balancing
In the case of balancing with a single termination resistor, it is possible to detect 3 distinct
conditions on the zone:
•stand-by
•alarm
• tamper (short-circuit)
For each of these, the control panel reads different resistance values on the terminal, shown
below in Ohm.
If you wish the detector to signal tamper events, it is advisable to connect the “Tamper”
terminal to a “24h” zone on the control panel.
3-5-3
Double balancing
In the cases of balancing with double EOL resistor and customized balancing, it is possible to
detect 4 distinct conditions:
•stand-by
•alarm
• tamper (short-circuit)
• tamper (wire cutting)
For each of these, the control panel reads different resistance values on the terminal, shown
below in Ohm.
3-5-4
Double-Zone balancing
In the case of a double zone without an EOL resistor, it is possible to detect 5 distinct
conditions for the entire terminal:
• stand-by on both zones
• alarm on zone 1 and stand-by on zone 2
• alarm on zone 2 and stand-by on zone 1
•alarm on both zones
• tamper (wire cutting)
For each of these, the control panel reads different resistance values on the terminal, shown
below in Ohm.
Ohm Zone
> 6800 alarm
6800 stand-by
0tamper
Alarm
+12V GND
6K8ƻ
Ohm Zone
> 6800 tamper (wire cutting)
6800 alarm
6800 / 2 stand-by
0 tamper (short-circuit)
Ohm
Zone 1 Zone 2
(double)
> 3900 + 6800 tamper
3900 + 6800 alarm alarm
6800 stand-by alarm
3900 alarm stand-by
0stand-bystand-by
Alarm
+12V GND
Tamper
Alarm
+12V GND
Tamper
3K9ƻ
Zone 1
Zone 2
6K8ƻ
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