26
Johnson Controls, Inc. SLC Wiring Manual —
P/N 51870:G 04/23/2009
Section 4: SLC Circuits without Isolators
4.1 Overview
This chapter concerns itself with the two styles of circuits that do not require isolation devices:
•
NFPA 72 Style 4
•
NFPA 72 Style 6
4.2 NFPA Style 4 SLC
NFPA Style 4 requirements can be met by using the diagram below.
•
T-tapping of the SLC wiring is allowed for Style 4 configuration.
Figure 4.1 Basic NFPA Style 4 SLC
SLC-style
4
.cd
r
Two-wire Addressable Detector
Addressable Module
T-tapped Circuits
Control Panel
SLC
B+ B–