The number of inputs/outputs in a modular is defined by the number (1 or 2) and the type of base units used.
This number can be from 10 to 32 for base units, and from 4 to 16 for analogue base units.
A
display block indicates locally the status of the modular TBX and its inputs and/or outputs: basic and extension modules.
The modular TBX module has 4 physical components:
-
a communication module (1) and a base unit (2), for the basic module,
-
a connection cable/cover (3) and a base unit (4), for the extension module,
The following diagram shows a modular TBX module.
The base units (2) and (4) share the same features and thus are interchangeable.