Wiring Between The Infrared Transmitter/Receiver Unit And The Central Unit; Notes On Wiring; Distributor Use; Wiring Examples - Toa TS-800 Series Operating Instructions Manual

10.3. Wiring between the Infrared Transmitter/Receiver Unit and the Central Unit

10.3.1. Notes on wiring

Infrared transmitter/receiver
When two or more Infrared Transmitter/Receiver units receive infrared signals from the Chairman and
Delegate units, the signal reception level increases if input signals to each Transmitter/Receiver unit are in
phase. If not in phase, the signal reception level may decrease.
• To put signals in phase, ensure that the following cable length between two components are identical.
Length between each Infrared Transmitter/Receiver unit and the Central unit: L + M0 + N0 = M1 + N0 = N1
Note: This distance must always be the same even if a distributor is included in the wiring.
Length between Infrared Transmitter/Receiver unit and distributor:
Length between distributors (where two distributors are connected):
Length between distributor and Central unit:
(In the above figure, since there is only one N0 connection, the length need not be matched for the N0 line.)
• The maximum cable length between each Infrared Transmitter/Receiver unit and the Central unit differs
depending on the type of coaxial cable to be used. (Refer to p. 45.)
Take care not to exceed the maximum cable length.

10.3.2. Distributor use

• The YW-1022 is a 2-branch distributor, and the YW-1024 is a 4-branch distributor. In the case of the YW-
1024, its distribution terminals may become idle depending on the Infrared Transmitter/Receiver unit's
wiring. However, this presents no problem.
• Avoid connecting more than 2 distributors in series. Connecting 3 or more distributors increases high-
frequency signal loss, and could result in system malfunction.
• It is possible to mix Infrared Transmitter/Receiver units not connected to any distributor, those connected to
1 distributor, and those connected to 2 distributors in the same system.

10.3.3. Wiring examples

[Example 1]
N
N
Central unit
L L
L L
M0
M1
N0
Central unit
Infrared transmitter/receiver
N
All cables for "N" must be identical in length when the Infrared
N
Transmitter/Receiver unit and the Central unit are installed in
the same space.
Distributor
L
L
M0
M1
N1
L
M0
N0
27