2-48
AFP-400 Installation
PN
50253
:
A2 03/12/96
Two-Wire SLC Communications Loop
LOOP
ADDRESS TYPE
ION
PHOTO
THER
1
2
3
4
5
6
1
2
3
4
5
6
RS485
RS485
RS485 ACS
TB3
TB4
TB5
TERM IN TERM OUT
1
2
3
4
-
+
-
+
1
2
3
4
-
+
-
+
9
8
7
6
5
1
2
3
4
-
+
-
+
-
+
+
-
9
8
7
6
5
1
2
3
4
COM
NC
NO
- +
TB6
SLC2 SLC2 SLC2 SLC2
SLC1 SLC1 SLC1 SLC1
-
+
The following is a typical wiring diagram of a supervised and power-
limited two-wire SLC communications loop that meets NFPA 72-1993
Style 4 requirements. The following table contains loop connections for
the SLC loop in the wiring diagram.
Connection
Loop 1
Loop 2
Loop Out
TB5-1 (+)
TB5-3 ()
TB6-1 (+)
TB6-3 ()
Loop Return
TB5-2 (+)
TB5-4 ()
TB6-2 (+)
TB6-4 ()
ISO-X devices are not required to
meet NFPA Style 4. You can
install a maximum of 25 devices,
detectors, or modules between
isolator modules.
BX-501 Base
For use with
SDX, CPX and FDX Series
Intelligent Detectors
ISO-X
ISO-X
CMX
MMX
Two-Wire SLC Communications Loop (NFPA 72-1993 Style 4)
CPU-400
separate
T-Tap to
other loop
devices
BX-501 Base
BGX-101L
no connection
