turck BL20-GW-CANOPEN, User Manual, Page: 18 / 95

BL20 Philosophy
D301087 1211 - BL20 CANopen 2-4
The power supply for gateways and I/O modules is fed to the power distribution modules; therefore, it
is not necessary to supply each individual module with a separate voltage.
2.2.3 Electronics Modules
Electronics modules contain the functions of the BL20 modules (power distribution modules, digital
and analog input/output modules, and technology modules).
Electronics modules are plugged onto the base modules and are not directly connected to the wiring.
The assignment table in the Section "Ordering Information" of the "Appendix" shows the possible
combinations of electronics and base modules. 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 2-2:
Power distribu-
tion module
Figure 2-3:
Electronics
module in slice
design