page 12 579-1015 Rev U
4100ES Extended Power Supply Installation Instructions
• Add the alarm loads of all the devices on an SLC wire branch and apply to Equation 1.
• Add the unit loads for all devices on an SLC wire branch and the number of isolators and apply to UTP Wiring Limit Based on Communication
in Figure 11.
Maximum wire resistance protected by 1 isolator is 1.5 ohm (total, both wires).
Wire the devices as instructed in the Class B Wiring to Devices sections section.
Figure 15: Class B Wiring With Isolators
* 4905-9929 Isolator
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