2.15 Digital Communications

Digital communications is fitted in all controllers and uses the Modbus protocol EIA485 2-wire (formerly RS485).

 

☻ Cable screen should be grounded at one point only to prevent earth loops.

 

• Isolated 300Vac CAT II.

 

 

Note:

 

The device physical interface can only support up to 31 devices for each segment. More than 31 devices will require additional buffering. For more details see the Communications Manual which is available from your supplier.