Simplex 4100ES Installation Manual page 200

• 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 Table 39.
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 IDNAC Devices" section.
22.7.5 EPS Auxiliary Power Wiring
22.7.5.1 AUX/ NAC Terminal
The AUX/NAC terminal block is located on the top right corner of the EPS.
Through the ES Panel Programmer, this point can be configured as either a 24V Auxiliary (AUX) power or as a simple reverse polarity
Notification Appliance Circuit (NAC).
page 198
Figure 119: Class B Wiring With Isolators
4100ES Fire Alarm System Installation Guide
574-848 Rev. BQ