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EXTA2-* Keyboard
Safety
1.5
Repair and Maintenance
The device must not be repaired, changed, or manipulated. In case of failure, always replace
the device with an original device.
1.5.1
Maintenance
Standards, directives, or statutory requirements stipulating regular system tests may exist in
connection with keyboards and mouse devices used as part of a system.
The keyboard functionality should be tested at least twice per year, or more often under heavy-
duty conditions.
Do not use caustic fluids to clean the keyboard.
A dirty keyboard could cause a malfunction or ultimately stop working.
1.6
Disposal
Disposal of devices and their packaging material must be performed in compliance with the
applicable laws and guidelines of the corresponding country.
The devices do not contain any batteries that need to be disposed of separately from the
products.
1.7
Intended Use of the EXTA2 Keyboard
EXTA2 is a PC keyboard with an optional control element for mouse functions (touchpad,
trackball, joystick). The keyboard has USB interfaces for intended use in Zone 1 and Zone 21
hazardous areas according to ATEX Directive 2014/34/EU and IECEx. The USB interfaces of
the keyboard and the control element for mouse functions are separated, intrinsically safe
circuits. Both intrinsically safe circuits are led out either in one or two separate connection
cables. The conncection cable corresponds to type "B" according IEC 60079-14 section
12.2.2.8. The cable has to be secured and effectively protected from damage. The EXTA2
keyboard cannot be installed in locations where corrosive media may be used.
To avoid discharge processes, the keyboard may only be installed in areas where high
electrostatic buildup due to dust is unlikely. To avoid electrostatic charging, the keyboard
cannot be covered or glued with foils.
The keyboard cannot be exposed to direct sunlight, unless it is equipped with the UV-resistant
foil option.
When connecting the EXTA2 keyboard to a VisuNet RM/PC, keep in mind that the USB
connection is not hot swappable. Connect the keyboard cable when there is no voltage
applied.
If circuits with type of protection Ex i are operated with non-intrinsically safe circuits, they must
no longer be used as circuits with type of protection Ex i.
7
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