Plan a Local Network (Bus) Architecture

The local network bus supports one gateway and as many as 39 additional devices. Follow these guidelines as you plan a bus:

Each end of the bus must be terminated. The gateway provides internal termination.
The minimum separation between connectors is 50 mm (1.97 in), but a 100 mm (3.94 in) or larger separation between connectors is recommended.
The maximum network distance from the gateway connection to the 1486-CON-T1 terminator connection is 25 m (82 ft).

The figure below provides an example layout of a gateway with supported devices where position 0 is the gateway, position 1…21 are the supported devices, and position 22 is the 1486-CON-T1 terminator.