4 Connections and Insulation Block Diagram     
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(2)  Module Expansion 
When using the bottom power supply/communication connection terminal (Power/Comm. 
connection terminal), up to 31 modules can be connected at the same time. 
Maximum required power = 31 X 5 W = 155 W 
 
When connecting several module sets (31 modules or less), each module set requires 
separate power supply.