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Unit No.
switch setting
Master Unit
Slave Unit 1
Slave Unit 2
Slave Unit 3 Slave Unit 4
Slave Unit 5
Slave Unit 6 Slave Unit 7
1234
Unit Number
ON
OFF
8. MASTER/SLAVE CONNECTIONS
An entire system can have up to 256 Alarm/Remote inputs through master/slave connections (cascade
connections) of up to 8 C-AL80 Units.
8.1 Unit Number Settings
Be sure to set the unit number when making master/slave connections.
Because each component is factory-preset to the unit number for individual use (same setting as the master
unit), change the number when making a master/slave connection.
Note
Make sure that the Power switch is set to OFF when changing each switch
setting. The system does not operate correctly if the change is made with the
Power switch set to ON.
Settings
Use Unit No. Setting switches 1 – 3 to perform settings. Refer to the following table for switch settings of the
master unit and slave units. Assign slave unit numbers in consecutive order with the lowest number first. Be
sure that no numbers are duplicated.
8.2. Master/Slave Terminal Connections
Connect the Master/Slave terminals of all C-AL80 units to be included in the master/slave connection in order
of the unit number. Set the RS-485 Termination switch of the master unit and the last-connected slave unit
(highest unit number) to ON, and those of other units to OFF. Set the Termination switch to OFF when using
the unit individually. (Factory-preset position: OFF.)
Note
The system does not operate correctly when the unit number is not correctly set, when the unit numbers are
duplicated or not consecutive or when the BS-485 Termination switch is not correctly set.