5 First Commissioning
5.1 Electrical Connection
Risk to life caused by an electric shock
Connection to socket without a protective earth conductor
− Connecting the device to sockets without a protective earth conductor can
lead to life-threatening injuries caused by an electric shock.
• Always operate the device using sockets with a protective earth
conductor (PE).
Danger to life through electric shock
Damaged power cable
− Operating the device with a damaged power cable or plug can lead to life-
threatening injuries caused by an electric shock.
• Before operating the device, check the power cable and plug for
damage.
• Never operate the device with a damaged power cable or plug!
Electrical connection
Failure to observe the values on the type plate
− Electronic and mechanical components may be damaged.
• Connect the device only to a mains supply matching the values on
the type plate.
WARNING When connecting the power cable to the mains supply, use an external fuse that
complies with the regulations applicable to the place of installation.
− Check the type plate for details on the necessary voltage, frequency, and maximum
external current source fuse for the device.
− The listed values must agree with the existing mains supply.
− Only use the supplied power cable to connect the device to the mains supply.
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The MM 400 must be connected to the power supply on site for initial commissioning.
Ensure the following before connecting the device to the power supply:
• The application site complies with the installation requirements;
• The device is securely and firmly in place;
• The power values for the device (type plate) correspond to the values of the power
supply at the site.
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