Lenel DirecDoor, Installation Manual

Page: 55 / 90

DirecDoor Installation Guide
55
Available Resistance Combinations
OnGuard System Administration - EOL Resistor Tables Form
The values created in OnGuard as shown above can be used as an example of how to configure a 1k-
1k end of line circuit.
•
Tamper conditions are generated when the input values fall below 750 ohms, when they are
between 1250 ohms and 1550 ohms, or when they exceed the 2500 ohms resistance.
•
Any values within the Normal low range represent an Alarm Restored event.
•
An Alarm Active condition is reported when the input resistance falls in the Normal high range.
Notice that both the Alarm Restored and Alarm Active states need to be wide enough to accommodate
important factors, such as the cable length resistance (approximately 10
Ω
/1000 feet) and the
granularity of the controller’s A2D (analog to digital) device.
Resistor Table 3 on page 55 summarizes the expected events under this configuration.
Resistor Table 3
Table Resistances Detected by PXNplus on page 56 summarizes the resistance values detected by the
PXNPlus controller.