Overall Limitations
NOTI•FIRE•NET™ PN 50257:E 7/5/01
9
Table 3 Twisted Pair Cable Lengths per Cable Segment (2 of 3)
Table 4 Twisted Pair Cable Lengths per Cable Segment (3 of 3)
•
Fiber Optic Circuits
The attenuation of cabling between two nodes/repeaters (fiber optic circuits are point-to-point)
must not exceed a 8 dB limit. If the distance required for a circuit segment is greater than
permitted, a Repeater module (RPT-F) must be inserted into the circuit at intervals less than, or
equal to, the 8 dB attenuation length restriction.
Attenuation Determination:
Find the rated dB loss per foot within the cable manufacturer's specifications. Determine the
total attenuation between the two nodes/repeaters due to the cable.
Loss = (loss/ft.) x (length in feet)
Establish the dB loss for each connector and splice. Sum all the losses.
SIGNAL 82802-06-14, 18 AWG, 1
Pair Unshielded
Mid-Cap., FPLP, PVC, NEC
Article 760, UL 1424
High:
1-1200
1-100
Low:
1000-2800
N/A
SIGNAL 98181-06-04, 18 AWG, 1
Pair Unshielded
Mid-Cap., FPL, PVC, NEC
Article 760, UL 1424
High:
1-1200
1-100
Low:
1000-2800
N/A
SIGNAL 962034619, 24 AWG,
3 Pair Unshielded
CLZ/CMR
High:
1-1400
1-100
Low:
1200-2000
N/A
SIGNAL 962044619, 24 AWG,
4 Pair Unshielded
CLZ/CMR
High:
1-1400
1-100
Low:
1200-2000
N/A
SIGNAL 962064619, 24 AWG,
6 Pair Unshielded
CLZ/CMR
High:
1-1400
1-100
Low:
1200-2000
N/A
SIGNAL 962624619, 24 AWG,
4 Pair Unshielded
CMR/MRP
High:
1-1400
1-100
Low:
1200-2000
N/A
SIGNAL9669544623, 24 AWG, 4
Pair Unshielded
CMP/MPP
High:
1-1400
1-100
Low:
1200-2000
N/A
WEST PENN WIRE D999,
12 AWG, 1 Pair Shielded
FPL, PVC, NEC, Article 760, UL
1424 and 1581
High:
1-800
1-100
Low:
800-1400
N/A
Cable Manufacturer, Part
Number, and Number of Gauges/
Conductors
Manufacturer's Specifications
Data Threshold:
All Nodes And/Or
Repeaters On A
Cable Segment
Permissible Single Twisted Pair Range
(In Feet) For Each Cable Segment
Point-To-Point
Bus Configuration
2 Nodes/Repeaters
3 to 7 Nodes/Repeaters
Cable Manufacturer,
Part Number,
and Number of
Gauges/Conductors
Manufacturer's
Specifications
Data Threshold:
All Nodes And/Or
Repeaters On A
Cable Segment
Permissible Single
Twisted Pair Range (In Feet)
For Each Cable Segment
Point-To-Point
Bus
Configuration
2 Nodes/Repeaters
3 to 7 Nodes/Repeaters
WEST PENN WIRE 991,
14 AWG, 1 Pair Shielded
FPLR, UL 1424 and UL 1666 High:
1-800
1-100
Low:
600-1000
N/A
WEST PENN WIRE D995, 14
AWG, 1 Pair Shielded
FPL, PVC, NEC, Article 760,
UL 1424 and 1581
High:
1-800
1-100
Low:
800-1400
N/A
WEST PENN WIRE AQ225,
16 AWG, 1 Pair Unshielded
FPL or PLTC
Direct Burial Water Blocked
High:
1-1400
1-100
Low:
1200-2800
N/A
WEST PENN WIRE AQ294,
16 AWG, 1 Pair Shielded
FPL or PLTC
Direct Burial Water
Blocked
High:
1-1000
1-100
Low:
1000-1600
N/A
WEST PENN WIRE D980,
18 AWG, 1 Pair Unshielded
FPL, PVC, NEC Article 760,
UL 1424 and 1581
High:
1-1200
1-100
Low:
1000-3000
N/A
WEST PENN WIRE D975,
18 AWG, 1 Pair Shielded
FPL, PVC, NEC Article 760,
UL 1424 and 1581
High:
1-800
1-100
Low:
800-1400
N/A
NOTE: In the event of a panel failure at a wire node, the data is not regenerated locally. The node may be manually bypassed using the NBB-1
Assembly. In this case, the total length of wire becomes the sum of both lengths of wire between operating nodes. If the total length exceeds the
maximum allowable length for a given threshold, the network may lose communication. Separately powered repeater(s) may be employed at each
node in a point-to-point connection to ensure data regeneration.
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