Fire-Lite Alarms MS-9200E Programming, Installation, Maintenance And Operating Instruction Manual page 31

Wiring the Signaling Line Circuit
Style 6 Four-Wire Communications Loop (Supervised and Power-limited)
The 4-wire communications loop meets NFPA 72 Style 6 requirements. Style 6 cannot be T-tapped.
Four-Wire Communications Loop
FIGURE 2-12:
CAUTION! Do not
loop wiring under
any terminals. Break
wire run to maintain
supervision.
SD300
-
+
COM
NO
NC
C304
I300
Shield
A B B+ A+ B- A-
T
B
1 2 3
6
Connect Loop Out to TB6-3(+) and TB6-5 (-)
Connect Loop Return to TB6-4(+) and TB6-6(-)
Document #50428 Rev. C1
BG-10LX
Note: I300 devices are
not required to meet
NFPA Style 6.
4 5 6
2/15/99 P/N 50428:C1
-
-
+
+
+
-
M300
I300
31