Hardware-Installation
Manual • Doc.-No.: C.3030.21 / Rev. 1.4
CAN-CBX-AI420
Page 22 of 103
3.4.2 Connection of the Power Supply Voltage
The power supply voltage can be supplied via the 24V connector or via the InRailBus.
Attention!
Please note the safety instructions containing the requirements on power supply current
circuits (see page 4)!
Attention!
The connections for the 24 V power supply are internally connected and must not be
supplied by two independent power sources at the same time!
Fig. 9: Connecting the power supply voltage to the CAN-CBX station
Earthing of the Mounting Rail
Note:
The functional earth contact (FE) has to be connected to the mounting rail. Please note,
that the impedance of the connector cable has to be kept as low as possible.
The functional earth contact is a current path of low impedance between circuits and earth, that is not
intended as protection measure, but improves the stability. It is not a protection against accidental
contact for persons.