Hirschmann RS20 series User Manual page 6

Device casing

Only technicians authorized by the manufacturer are permitted to open
the housing.
 Never insert pointed objects (narrow screwdrivers, wires, etc.) into the
device or into the connection terminals for electric conductors. Do not
touch the connection terminals.
 Keep the ventilation slits free to ensure good air circulation.
See "General technical data" on page 64.
 Install the device in the vertical position.
 At ambient temperatures > 140 °F (60 °C):
The surfaces of the device housing may become hot. Avoid touching
the device while it is operating.
Qualification requirements for personnel

 Only allow qualified personnel to work on the device.
Qualified personnel have the following characteristics:

Qualified personnel are properly trained. Training as well as practical
knowledge and experience make up their qualifications. This is the
prerequisite for grounding and labeling circuits, devices, and systems
in accordance with current standards in safety technology.
 Qualified personnel are aware of the dangers that exist in their work.
 Qualified personnel are familiar with appropriate measures against
these hazards in order to reduce the risk for themselves and others.
 Qualified personnel receive training on a regular basis.
National and international safety regulations

Verify that the electrical installation meets locally or nationally applicable
safety regulations.
Grounding the device

The housing is grounded via the separate ground screw on the bottom left
of the front panel.
 Use a wire diameter for the ground conductor that is no smaller than
the diameter of the supply voltage connection, however of at least 1.0
mm² (AWG16).
 Ground the device before connecting any other cables.
 Disconnect the grounding only after disconnecting all other cables.
Shielding ground

The overall shield of a connected shielded twisted pair cable is connected
to the ground connector on the front panel as a conductor.
 Beware of possible short circuits when connecting a cable section with
conductive shielding braiding.
6
Installation RS20/22/30/32/40
Release 05 12/2015