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Appendix
9.4 R
ECOMMENDED
9
.
4
.
1
R
S
-
4
9
.
4
.
1
R
S
-
4
Applies to:
Ring 1 communication lines
Annunciator communication lines
Requirements:
Minimum 0.75mm
Style
(+ separate 2 core cable for 24VDC module power )
Max distance
Communications cable: 1000M between modules with 1.5mm
(24VDC power cable distance will be determined by voltage drop)
Notes:
Note:
When annunciators or Field Modules are powered from external power supplies, use a separate conductor to
connect the main power supply common terminal (-0V) to the remote power supplies common terminal (-0V).
The EIA-485 circuit MUST be wired using a twisted-pair shielded cable. Do not run cable adjacent to, or in the
same conduit as, 240-volt AC service, noisy electrical circuits that are powering mechanical bells or horns, audio
circuits above 25 V
or motor control circuits. All enclosures, including the FIP cabinet, must be connected to
RMS
electrical earth! Never use the shield as an earthing conductor.
Terminate the shield at the outside of the FIP cabinet (ground). Where this is not possible, the shield must be
terminated to physical ground immediately adjacent to cable entry. Between Field modules, connect shields
together outside of their respective enclosures. Make sure that the shield is only grounded at the FIP and not at
the modules or annunciators. Do not ground both ends of the shield; one end should be left floating.
Terminate the
shield at the
outside of the FIP
cabinet (ground).
FIP Cabinet
FIM
Do not ground both
ends of the shield;
one end should be
left floating.
BC-200 Manual – P/N DOC-01-013
C
ABLING
8
5
R
C
8
5
R
C
I
N
G
O
M
M
U
I
N
G
O
M
M
U
2
x 2 core Twisted Pair Shielded communications cable
Maximum of 16 annunciators between any two modules
Fire rated cables may be required as per AS1670, AS1668, AS2118
R
EQUIREMENTS
C
C
N
I
C
A
T
I
O
N
A
B
L
I
N
N
I
C
A
T
I
O
N
A
B
L
I
N
G
G
2
cable
Shield
Data Cable
Do not connect
shields to modules or
annunciators.
Wire shields together
outside of the
respective
enclosures.
101
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