page 58 579-1150 Rev M
4010ES IDNAC Fire Alarm System Installation Guide
Figure 47: Class B wiring with TrueAlert addressable isolators
7.3 ESS AUX/NAC wiring
AUX/NAC terminal
The AUX/NAC terminal block is located on the upper right side of the ESS.
Through the ES Panel Programmer, this point can be configured as either a 24V Auxiliary (AUX) power (with Class B support, see note 6) or
as a Class B simple reverse polarity Notification Appliance Circuit (NAC).
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