2-50
AFP-400 Installation
PN
50253
:
A2 03/12/96
Four-Wire SLC Communications Loop (NFPA 72-1993 Style 7)
Obtain Style 7 operation by using Isolator Bases (B524BI or B224BI) with
each detector flanking monitor modules with ISO-X modules (see the
wiring diagram below). Wire-to-wire shorts on the communication loop do
not prevent the control panel from receiving alarm signals.
Do not T-Tap or branch a Style 7 four-wire SLC communications loop.
Ratings and characteristics are identical to a NFPA Style 6 four-wire SLC
communications loop. Connections between the loop and CPU-400 SLC
terminal TB-5 follow.
Connect...
To...
Loop Out
TB5-1 (+)
TB5-3 (-)
Loop Return
TB5-2 (+)
TB5-4 (-)
SLC Loop to CPU-400 Connections
The following diagram shows typical wiring for a Style 7 SLC loop.
Style 7 Wiring Diagram
Style 7 Overview
CPU-400
Detector in
Isolator Base 3
Detector in
Isolator Base 2
Detector in
Isolator Base 1
ISO-X Isolator
Module
ISO-X Isolator
Module
Style 7 Four-Wire SLC Communications Loop
Install all wiring between
a manual pull station and
ISO-X modules in con-
duit.
Manual Pull Station
with MMX-101 (flanked
by ISO-X modules).
ISO-X
ISO-X
Detector in
Isolator Base 4
