Aiphone RAX R24/A - Manual (Page 10)

VI. Wiring
There are two basic wiring methods for RAX system.
In either case, you must use two twisted pair per station.
METHOD 1: 2 twisted pair in home run manner from each station to RAX Central Exchange Unit.
METHOD 2: More than one station can be run in multiple twisted pair cable.
DO NOT RUN SPEAKER LINE IN MULTIPLE PAIR CABLE FOR STATIONS.
* A combination of the above methods may also be used.
Refer to the chart below and select wire gauge required for your installation;
Wire size 0.5 mm 0.65 mm 0.8 mm 24AWG 22AWG 20AWG
Max. wiring distance
from station to
RAX CEU
350 m 600 m 900 m 1,200' 2,000' 3,000'
PAGIIMG/REMOTE CONTROL
The RAX system has the capacity of paging up to four separate zones and All Page.
Each zone requires one paging adaptor Model: MC-A, one amplifier and proper number of speakers for the amplifier output
(and one PB-YKX talkback paging adaptor is required for talkback). NOTE: All Page is a system function and does not require
special equipment or wiring.
NOTES; 1. If the system includes a remote control device, one paging terminal must be used for the RC-B remote control
adaptor. This will reduce the number of paging zones to 3.
2. Adding zones of paging and/or remote control does not reduce the station capacity of the system (i.e. a 24-
station system may have 24 stations plus 4 zones of paging and/or remote control).
3. If an RC-A adaptor is installed for each zone, only one MC-A paging adaptor and one amplifier is required for * *
zone page/AII Page. Talkback will require one PB-YKX talkback adaptor.
WIRING REQUIRED
* 2 twisted pair cable or multiple twisted conductor cable may be used for connecting station to RAX terminal board
Wiring is polarized in each twisted pair. These cables must be twisted pair.
* Connection to MC-A adaptor requires two common plus one individual conductors from CEU terminal board.
* Regulator unit in CEU must be earth grounded.
* Do not run speaker line in the same cable with station wires.
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