Suitable Cable Types - Interlogix FP 2000 Series Installation And Commissioning Manual

5.2 Suitable cable types

The maximum serial cable resistance must be no more than 100 ohm and the maximum
loop capacitance in parallel with this should not exceed 1uF.
This will ensure that 126 (900 Series) or 128 (2000 Series) detectors can be operated
over a distance of 2 km.
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FP/FR1100/1200/2000 V6: Installation and Commissioning Manual
The cable resistance limit is calculated to maintain the minimum required
supply - voltage in the presence of the worst-case load conditions.
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