4mm safety plugs can enter socket/outlet of other voltages systems, use wrong voltage or
wrong power supplies could carry a hazardous voltage that might result in serious injury or
death.
Protective conductor (identification: PE): Yellow or green and yellow conductor provided for
safety purposes, for example protection against electric shock.
Protective conductor connection must be done before other connections.
PE 4mm plug can be disconnected without a tool, so make sure your setup is stable/fix and
there is no tightness on connectors/cable.
Electric shock due to connection to an unsuitable power supply
When equipment is connected to an unsuitable power supply, exposed components may
carry a hazardous voltage that might result in serious injury or death.
Only use power supplies that provide SELV or PELV (see section legal information).