Aiphone GH Series Quick Start Installation Manual page 7

1-2
Expanded System Configuration Diagram
1. Common trunk line #1, 2
2. Sub trunk line #1 - 4
Sub trunk line #2 - #4 are the same as #1. Maximum 125 units
per sub trunk line.
(1) Audio signal line
(2) Video signal line
(3) Power supply line
a. Entrance station (For details, see 2-1 and 2-2)
b. Bus control unit
[1] Video Bus control unit GH-VBC
A In Expanded System, GH-VBC unit is used as extension
adaptor (SW2: EXP).
* Another GH-VBC can be added as the second extension
adaptor (SW2: EXP). The wiring distance from the Expanded
video Bus control unit GH-VBX to the farthest video
[2] Bus control unit GH-BC
c. Residential station (For details, see 2-4):
Station-to-station wiring (For details, see 1-1)
d. Residential station (For details, see 2-4):
Homerun wiring (For details, see 1-1)
single trunk line.
e. Security Guard Station
f. Expanded Bus control unit
[3] Expanded video Bus control unit GH-VBX
[4] Expanded Bus control unit GH-BCX/A
[5] Distribution terminal (junction): Not included
[6] Power supply PS-2420UL
Entrance Station
Maximum 125 stations
per Sub trunk line
Please refer to the GH installation manual for complete wiring
information on GH Expanded system.
1-3
Wiring Distance
* DP = Distribution Point