Class A Nac Wiring; Class B Nac Wiring - Simplex 4100ES Installation Manual

22.5.4 SPS NAC Wiring

22.5.4.1 Class A NAC Wiring

To connect the SPS to reverse-polarity, non-addressable notification appliances using Class A wiring, read the following instructions and
refer to Figure 99.
1. Route wire (between 12 and 18 AWG) from the "B+", "B-", and SHIELD outputs on TB2 of the SPS to the appropriate inputs on a
peripheral notification appliance. Use NAC1, NAC2, or NAC3.
2. Route wire from the first appliance to the next one. Repeat for each appliance.
3. Route wire from the last appliance to the A+ and A- inputs on the same NAC circuit of TB1 of the SPS.
4. Repeat steps 1 through 3 for each NAC output you want to use.
5. Leave the 10 K, ½ W, brown/black/orange resistor (378-030) on each unused circuit. The circuit must connect "B+" to "B-"
terminals. No external end-of-line resistor is needed for circuits in use.

22.5.4.2 Class B NAC Wiring

To connect the SPS to appliances using Class B wiring, read the following instructions and refer to Figure 100.
1. Route wire (between 12 and 18 AWG) from the B+, B-, and SHIELD outputs on TB2 of the SPS to the appropriate inputs on a
peripheral notification appliance. Use NAC1, NAC2, or NAC3.
2. Route wire from the first appliance to the next one. "T" tapping is not allowed. Repeat for each appliance.
3. Route wire from the last appliance to the EOLR harness (10K ohm, 1/2W: P/N 733-894, PID# 4081-9008).
page 176
Figure 99: Class A NAC Wiring
4100ES Fire Alarm System Installation Guide
574-848 Rev. BQ