TB20, strain gauge weighing module | Edition 1 | 21.12.2018
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2.2.4
Power module
The system’s bus coupler provides the supply voltage for the communications bus (5 V, top) and for
external signals (24 V, bottom). These voltages are passed from module to module through the base
modules.
Power modules make it possible to segment the power supply for both external signals and the
communication bus into individual power supply sections that are powered separately.
Power modules deliver all necessary power to the peripheral modules connected after them and, if
applicable, all the way to the next power module or power and isolation module. A power module is
required whenever the power supplied by the coupler alone is not sufficient, e.g., when there are a
large number of modules with high power requirements. The “TB20 ToolBox” configuration program
can be used to determine whether power modules are needed, as well as how many of them will be
needed.
Power modules have a lighter body color.
