Fujitsu Airstage J-II - Page 451

MAXIMUM CONNECTION OF NETWORK SEGMENT
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Network segment : divided network by signal amplier
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In the following case, signal amplier is required.
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(1) When the total length of the transmission line exceeds 500 m.
(2) When the number of total unit*1 exceed over 64 units.
When a signal amplier is installed, network is divided into two network segments.
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Network segments mean divided block which has been connected with signal amplier within
above condition.
In a network segment(NS), divided by a signal amplier, have to keep the following limitation.
Segment inside Limitation
Transmission line 500m or less
Number of unit *1 (See the next page) 64 or less
Terminal resistor 1
1 2 3 4 5 6 25
1 2 3 4
1 2 3
1 2 3 4 5 62
4
62
62
64
64
64
63
63
63
34
26 27 28 29 30 31 32 33
Network
segment 1
Signal
Amplier
Signal
Amplier
Transmission line : within 500m
64units
64units
64units
Signal
Amplier
Network
segment 2
Network
segment 3
Network
segment 4
Caution
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VRF network system should keep both of number of unit and wiring length.
When system exceeds either number of unit or wiring length, system should be devided.
Different VRF series may not coexist within the same network.
- (06 - 09) -
SYSTEM DESIGN SYSTEM DESIGN