BL67-philosophy
D300529 0115 - BL67 I/O modules2-4
2.2.1 Electronics modules
Electronic modules contain the I/O-functions of the BL67 modules (Power Feeding modules, digital and
analog input/output modules and technology modules).
Electronic modules are plugged onto the base modu
les and are not directly connected to the wiring.
They can be plugged or pulled when the station is being commissioned or for maintenance purposes,
without having to disconnect the field wiring from the base modules.
Figure 2-3:
Power Feeding modules
They are necessary when groups of modules with different potentials are planned within a BL67 station,
or
if the rated supply voltage of 24 V DC for the BL67 modules cannot be guaranteed.
The adjoining power supply module
and modules to the left are potentially isolated.
Example for an
electronic mod-
ule
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