Fujitsu AB* A12GATH, Design & Technical Manual

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Step 4 : Confirm how to install Signal Amplifier
When Signal Amplifier is installed, network is divided into two network segments.
In a network segment (NS) divided by a Signal Amplifier, it has to keep the following facts.
1)Total transmission line length: MAX 500 m
AB+BC+BD+DE+EF ≤ 500 m (Fig. 1)
2)The total number of units *1 : MAX 64
3)The number of terminal resistor : 1
4)Total transmission line length: MAX 3600 m
AB+BC+BD+DE+EF+EG+GH ≤ 3600 m (Fig. 2)
*1: Refer detail Meaning of unit on 1-2 VRF NETWORK SYSTEM.
A
B
C
D
E
F
A
B C
D
NS 1
NS 2
NS 4
NS 3
E
F
G
H
Transmission line
Transmission line
System
Controller
System
Controller
Touch
Panel
Controller
Touch
Panel
Controller
When AB+BC+BD+DE+EF>500m
:Signal Amplifier is required.
Signal Amplifier
Outdoor unit
Outdoor unit
Fig. 2 Fig. 1
Indoor unit
Indoor unit
Terminal
resistor
Terminal
resistor
Terminal resistor
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Step 5 : Confirm how to wire transmission line
Confirm how to connect transmission line between indoor units.
„
●
Arrange so that there is one terminal resistor for each network segment.
„
●
Always take a ground from both ends of transmission line.
X1 X2
TRANS-
MISSION
X1 X2
TRANS-
MISSION
Transmission line
Indoor unit Indoor unit
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Step 6 : Confirm transmission wiring system
Check your transmission wiring system if the transmission wiring system is ensured wiring rule.
Check list
□ Total Transmission wiring length
□ Total number of unit *1
*1: Refer detail Meaning of unit on 1-2 VRF NETWORK SYSTEM.
- (06 - 50) -
SY
ST
EM
DE
SIGN
SY
ST
EM
DE
SIGN