Inputs
6–20 iSTAR Ultra Installation and Configuration Guide
This method will report:
Short
Alert (500 ohms)
Normal (1K)
Alert (2K)
Open (>30K)
Line Fault (Any unexpected value) Usually due to wrong value resistors or faulty
resistors.
NO/NC Dual EOL 5K, 10K
Figure 6-16 on page 6-20 shows a method similar to the traditional Software House method of
supervision.
For 5K resistors - 5K = Normal. NO Alert = 2500 ohms, NC Alert = 10K
For 10K resistors - 10K = Normal. NO Alert = 5K, NC Alert = 20K
Notice that the wiring is different for NO and NC.
Figure 6-16: NO / NC Dual EOL 5K, 10K
For UL Listed products,
burglar alarms must be supervised.
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