Installation; Operation; Protection Against Touching Electrical Parts - B&R PP21 User Manual

Power Panel • Safety Guidelines

1.4 Installation

• The installation must take place according to the documentation using suitable
equipment.
• The devices may only be installed when isolated from the power supply and by
qualified personnel.
• General safety regulations and nationally applicable accident prevention guidelines
must be observed.
• Electrical installation must be carried out according to the relevant guidelines (e.g.
line cross section, fuse, protective ground connection).

1.5 Operation

1.5.1 Protection against Touching Electrical Parts

The operation of programmable logic controlllers, operating and monitoring devices and
uninterruptible power supplies necessarily means that certain components must carry
dangerous voltage levels of over 42 VDC. A life-threatening electric shock could occur if you
touch these parts. This could result in death, severe injury or material damage.
Before turning on programmable control systems, operating and monitoring devices and the
uninterruptible power supply, ensure that the housing is properly connected to protective ground
(PE rail). The ground connection must be established even when testing the operating and
monitoring devices and the uninterruptible power supply or when operating them for only a short
time.
Before turning the device on, make sure that all voltage-carrying parts are securely covered.
During operation, all covers must remain closed.
8 Power Panel User's Manual