Safety
Operating Instructions KB2 Keyboards
R. STAHL HMI Systems GmbH / OI_Keyboard_KB2_en_V_01_00_02.docx / 07.03.2022
Page 13 of 68
Additional information for HSG enclosures with "U3" device version only
For the connection of the UB03 device a cable must be used that has an insulation of at least
0.5 mm between conductor and outer coating.
The cable must be installed inside the enclosure with a minimum distance of 50 mm to bare,
conductive parts of the keyboard / pointing device.
3.5
Installation safety information
Only use suitable tools for the installation.
When keyboards and pointing devices are installed into the cut-out of closed enclosures,
the nuts used to fix them must be tightened with a tightening torque of at least 1 Nm.
The connection cable is approx.. 2.4 m long.
The connection cable must not be extended or replaced by the customer.
We recommend you use screened cables with the keyboards and pointing devices. Routing
of the cable may reduce performance.
The shield of the connection cable must be grounded with a maximum of 1
MΩ against the
ground.
The D+ and D- USB data conductors must be twisted right up to the terminals.
Once the devices have been connected to and operated in circuits with ia, ib or ic level
of protection or non-Ex circuits, they must no longer be operated in areas that require
circuits with higher levels of protection !
When installed and wired ex factory, the type plate of the keyboards will indicate the
applicable level of protection. For non-Ex circuits, the type plate will indicate "Industrial
use only when supplied with non Ex i circuits".
If a device is being replaced, the person responsible for the replacement of the old
and / or operation of the new device must ensure that the type plate of the new device
indicates the level of protection according to the connected circuit.
Additional information for KDB2-HSG / PD2-HSG
The back cover of the enclosure must be fixed with a tightening torque of
3.4 Nm (+0.6 / - 0 Nm).
Cable that come into contact with conductive parts must be mechanically protected and / or
securely installed to avoid damage to the insulation.
Make sure you are using the correct insulation / distance to achieve safe cable installation
with regard to the standards applicable for degrees of protection "i" and "e".
All Ex e and Ex i circuits must be completely de-energised before the keyboards and
pointing devices are connected. Do not open the lid of the enclosure if the devices are
energised.
