Simplex 4100ES Installation Manual page 199

4100ES Fire Alarm System Installation Guide
Figure 118: Class B Wiring
22.7.4.2 4009 IDNAC Repeater
Using a 4009 IDNAC Repeater extends the possible wiring distance and increases the current capacity of an IDNAC channel. Each IDNAC
repeater has a capacity of 3A, and regenerates the IDNAC signal. Models 4009-9601 (platinum enclosure) and 4009-9602 (red enclosure)
are compatible with the EPS. Refer to installation instructions 579-1019 for wiring details. All IDNAC devices wired to the IDNAC repeater
are synchronized to IDNAC devices wired to other EPS within the system.
22.7.4.3 Dual Class A Isolator (DCAI)
To wire an IDNAC as a Class A circuit, one or more DCAI modules (4100-6103) is required. Each DCAI includes 2 circuits, Class A, with fault
isolation. Refer to 579-1029 for wiring details and installation instructions. Synchronization of audible/visible devices is maintained with the
use of DCAI.
TrueAlert ES Speakers and Speaker/Visible appliances wired in a Class A circuit must use Table 41 here in place of Table 4 in publication
579-1029 (4100 ES/4007 ES Installation Instructions; 4100-6103 DCAI Card). The wiring limit distances shown in this table apply to maximum
wiring loop length. The final maximum loop length is the shorter of this value or the value from Table 38.
22.7.4.4 Calculating Class B wiring with Isolators
When using Isolators, the maximum wire distance of each of these SLC branches from panel to any device is the smaller of the values
obtained from Table 39, and the Equation 1. See Table 40 for the ohms per 1000 ft.
Equation 1: Maximum SLC Wire Branch Length Based on Appliance Alarm Current Load
page 197 574-848 Rev. BQ