TOA Electronics C-AL80(L), C-AL80(H) Master/Slave Connections, Unit Number Settings

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.

ON

1 2 3 4 OFF

Unit Number

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.

Master Unit Slave Unit 1 Slave Unit 2 Slave Unit 3 Slave Unit 4 Slave Unit 5 Slave Unit 6 Slave Unit 7

Unit No.
switch setting
1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4

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.

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