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Hi guys,
Currently I am designing modbus routing from control room to a field consists of 15 tanks. I plan to have a junction box place in the tank area.
So, here my question. Since I am using RS485, 1 1/2 pair modbus cable running from control room to junction box. Then, from junction box, I will have 15 single modbus cable going to each of the tank. How the modbus maximum length (1.2km) calculate from the design?
For exm: control room to junction box = 400m
junction box to each of the tanks = 20m
So my total length would be 400m + (20m x 15)?
or my total length would be 400m + 20m?
Please help me... Thanks for any feedback.
Currently I am designing modbus routing from control room to a field consists of 15 tanks. I plan to have a junction box place in the tank area.
So, here my question. Since I am using RS485, 1 1/2 pair modbus cable running from control room to junction box. Then, from junction box, I will have 15 single modbus cable going to each of the tank. How the modbus maximum length (1.2km) calculate from the design?
For exm: control room to junction box = 400m
junction box to each of the tanks = 20m
So my total length would be 400m + (20m x 15)?
or my total length would be 400m + 20m?
Please help me... Thanks for any feedback.