17
To connect the XPS to appliances using Class A wiring, read the following instructions and refer
to Figure 10, below.
1.
Route wire (between 12 [3.309 mm
2
] and 18 AWG [0.8231 mm
2
]) from the “B+” and “B-”
outputs on TB1 of the XPS 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 XPS.
4.
Repeat steps 1 through 3 for each NAC output you want to use.
5.
Leave the 10 K, factory-installed, 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.
B+ B- A+ A-
B+ B- A+ A-
B+ B- A+ A-
Figure 10. Class A Wiring
Step 4. XPS Field Wiring,
Continued
Class A NAC
Wiring
BLACK
RED
RED
BLACK
XPS
NOTIFICATION
APPLIANCES
TB1
12 AWG (3.309 mm
2
) to
18 AWG (0.8231 mm
2
)
Important:
Conductors must test free
of all grounds.
Place the 378-030 EOL
Resistor (10 K Ohm, ½ W;
brown/black/orange) on
unused circuits
NAC 2
NAC 3
Ferrite beads
required for CE
compliance. Use
kit 4100-5129.
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