The safety of persons and equipment in hazardous areas depends
on compliance with all relevant safety regulations. Thus, the
installation and maintenance staff carry a particular responsibility,
requiring precise knowledge of the applicable regulations and
conditions.
9.1 Installation and operation
Please note the following when installing and operating the device:
The national regulations for installation and assembly apply (e.g. EN/IEC 60079-14).
The keyboard may be installed in zones 1 or 2.
The intrinsically safe circuits must be installed according to applicable regulations.
Cables for intrinsically safe wiring have to pass a test voltage of AC 500 V / DC 750 V.
Use the values 200 pF/m and 1 μH/m at unknown cable properties. Do not use the
premounted interface cable of the KBDi-DS102W-xxx* keyboards in Zones 0 or 20.
The equipotential bonding connection of the device must be connected to the
equipotential bonding conductor of the hazardous area. The earthing cable must have a
minimum cross section of 4 mm² and be fitted propely.
When the interface of intrinsically safe devices/partial intrinsically safe devices was or is
connected to not intrinsically safe interfaces, the license will become void and it must be
operated as a not intrinsically safe device. If the device was operated on an intrinsically
safe interface with a lower level of international protection (e.g. a Ex ia device on a Ex ib
interface), it must not be operated afterwards in applications for a higher level of
international protection (e.g. Ex ia).
Cable glands are factory installed by the manufacturer and shall not be changed by
customers.
Interconnecting several active devices in an intrinsically safe circuit may result in different
safe maximum values. This could compromise intrinsic safety !
The safe maximum values of the connected field device(s) must correspond to the values
listed on the data sheet or the EC type examination certificate.
During assembly and operation of the Keyboard electrostatic surface charging must not
exceed that caused by manual rubbing.
National safety and accident prevention rules.
Generally accepted technical rules.
Safety instructions contained in these operating instructions.
