Wiring a Signaling Line Circuit (SLC)
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AFP-300/AFP-400 Installation PN 50253:C1 05/22/97 2-59
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Figure 2-78 shows a second method of powering a CMX from an MPS-400 NAC. (See
Figure 2-77 on page 2-58 for the first method.) The NAC is supervised and
power-limited. When an MPS-400 NAC supplies power to CMX modules:
• The CMX module outputs are coded if the MPS-400 NAC is coded.
• Program the MPS-400 NAC for general alarm. (Refer to the Programming Manual
for instructions.)
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Connect the NAC as follows:
1. Connect the SLC to CMX terminals 1 (–) and 2 (+).
2. Connect 24 VDC power from an MPS-400 NAC (TB7-TB10) to CMX terminals 3
and 4.
3. Terminate the power feed to the CMX module with a 2.2K ELR (PN R-2.2K) or
make the power feed a return to MPS-400 NAC terminals 3 and 4 (Figure 2-78).
4. Set the CMX rotary switches to the required SLC address. (The CMX takes one
module address on the SLC.) For instructions on setting rotary switches, see
Figure 2-68 on page 2-49.
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