Kendrion Kuhnke Automation GmbH
System description
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11/25/2016
3.3.2 Bus coupler
A 2-pin plug-in terminal block with screw flange is used to connect the system supply to the bus coupler.
Since the bus coupler supplies power to both the E-bus and the logic circuits of the I/O modules, its power
consumption depends on the number of I/O modules connected.
Power to the I/O module outputs is supplied separately
Figure 7: Spring-assisted terminal block with screw flange for the Bus coupler
3.3.3 I/O-Modules
The connection of the I/O supply takes place via the IO plug. Plug-in terminal blocks can be used with
different numbers of poles
The logic of I/O modules without own microcontroller is powered by the bus coupler. Modules with
microcontroller can have its own power supply, which is then supplied via the IO connector.
Figure 8: Spring-assisted terminal block, 1 row with release latch for I/O-modules
Figure 9: Push In terminal block, 2 rows with release latch for I/O-modules
A rapid shut-down of all outputs can be performed by external switch-off of
the I/O supply voltage L+.
The missing supply voltage is indicated by the power LED.
However, not all modules have an undervoltage monitoring, which can
report this status to the control unit.
If you need the monitoring of the I/O power supply in the control program,
connect L+ with a digital input and use it representative for the IO power
supply.
