30 Johnson Controls, Inc. SLC Wiring Manual — P/N 51870:G 04/23/2009
SLC Circuits with Isolators NFPA Style 4 SLC Using Isolator Modules
5.4 NFPA Style 4 SLC Using Isolator Modules
A variation of a Style 4 operation using isolator modules to protect each branch of the SLC. Refer
to Figure 5.1 on page 28 for M500XJ wiring and to Section 5.1, “Overview” for limitations.
Two-wire Addressable Detector
Addressable Pull Station
SLC-style4iso.cdr
Control Panel
SLC
B– B+
Isolated Branch
Isolator Module
Isolator Module
Isolator Module
Isolated Branch
Isolated Branch
Figure 5.3 NFPA Style 4 SLC Using M500XJ Modules
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