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Installation and Operation Manual
ALU
One ALU can support one addressable loop circuit, which supports up to 252 points of addressable devices.
Initializes and operates all devices residing on the loop and communicates all relevant devices and event
information, such as alarms and troubles, to the System CPU.
Circuit topology support: Class A or Class B.
ALU address is set by the rotary switch on the board. The valid address range is 1~4.
The ALU must be set to a correct address before use. Please refer to Unit Address
Setting section for detail.
Addressable Loop
Circuit
Figure 8 ALU
12
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