Aiphone YAZ-90-3 - Manual (Page 6)

WIRING DIAGRAM
STATION #@)---------STATION #(25) STATION # (3^ STATION # STATION # (99)
* YAZ-90-3 is a parallel-wiring system, requiring only 4 twisted-pairs of conductors throughout the system.
Terminals Nos.Q] and [^for first communication channel.
Terminals Nos.[s] and [^for second communication channel.
Terminals Nos.[5] and [^for third communication channel.
Terminals Nos.[+] and for power supply.
IMPORTANT WIRING INSTRUCTIONS
(1) WIRING;
* Use twisted pair cable.
* Connect first twisted pair to terminals [T] , second twisted pair to terminals [S] , third twisted pair to ^ ^ and
forth twisted pair to[T] [J . Do not cross wires.
* Even if you have extra wires, do not use them for communication line (Do not connect two or more wires to each number
terminal).
(2) PS-24N POWER SUPPLY CONNECTION
* One PS-24N power supply is required for every 30 stations.
* Each PS-24N power supply must be located near the center of each 30 station group.
* Jp' and #-) lines must not be installed between 30 station groups, i.e. If the system includes 60 stations the first
PS-24N should be connected to station No. 25 and the second PS-24N to station No. 55. Do not connect terminals[T]
and py between stations Nos. 39 and 40.
* If you have extra wires, it may be used for wiring to [T] [)p lines (never for communication lines). It is important, how­
ever, the line resistance on p] p(] lines is equal. See drawing below.
Group 1 Group 2 Too
NOT CONNECTi
ex. STATION STATION
[T^-[3^ |40l-r^