ifm
Basic Device Manual AS-i ControllerE M4 Target V15
2015-10-30
Safety instructions
Warnings installation
14
2.4
Warnings installation
NOTICE
Short circuit, incorrect wiring possible.
Consequence: Malfunction of the machine/plant in which the device is installed!
► The unit must be installed and connected by a qualified electrician.
► Disconnect power before connecting the controllereto avoid short circuits during installation.
► Connect the terminals according to the terminal marking.
► The supply voltage (SELV) must not be connected to protective earth. Therefore never connect
the minus terminal to the FE terminal or to another terminal of the device.
It must be ensured that the external voltage is generated and supplied according to the criteria for
safety extra-low voltage (SELV), since this voltage is provided without further measures to supply the
connected controller, the sensors and the actuators.
The wiring of all signals in connection with the SELV circuit of the device must also comply with the
SELV criteria (safety extra-low voltage, safe electrical separation from other electric circuits).
If the supplied SELV voltage is externally grounded (SELV becomes PELV), the responsibility lies with
the user and the respective national installation regulations must be complied with. All statements in
these operating instructions refer to the device the SELV voltage of which is not grounded.
The connection terminals may only be supplied with the signals indicated in the technical data or on
the device label or only the approved accessories of
ifm electronic
may be connected.
