Operating Instructions KB2 Keyboards
Mounting and installation
Page 34 of 68
R. STAHL HMI Systems GmbH / OI_Keyboard_KB2_en_V_01_00_02.docx / 07.03.2022
7.4
Installation
Explosion hazard due to improper installation !
Non-compliance may result in fatal or serious injuries.
Ensure the atmosphere is non-explosive.
Make sure that the device is not damaged.
If the device is connected to the mains:
o
Disconnect the device from the power supply.
Explosion hazard due to electrostatic charge!
Non-compliance may result in fatal or serious injuries.
Do not paint / coat the device or retouch its paint / coating. All
repairs must be carried out by the manufacturer.
If additional sticky labels are attached, the specifications of
EN IEC 60079-0 must be observed.
Clean the device with a damp cloth only.
7.4.1
General information on electric connection
Connect cables carefully.
Do not screw down on the conductor insulation.
Do not switch conductors.
Observe code of practice when connecting conductors.
Firmly screw down conductors.
Cables are attached ex factory and must not be extended or replaced.
The KB2 device versions are fitted with an 8-pole cable (+ shield conductor), and the PD2
versions with a 4-pole cable (+ shield conductor).
Shield the cable with a maximum of 1
MΩ against ground.
Twist the D+ and D- data
conductors
until right up to their terminals.
Pay attention to specified torques for screws to avoid damage to threads.
Suitable measures against electrical surge during lightning strike may be necessary.
Only connect and operate keyboards with the same protection level (see note on "
") !
For the connection of keyboards to IT-xx7 non-Ex devices use the "Non-Ex connector KB2
set" (2x USB connector) (SAP no. 301224) !
7.4.2
Connecting the device
1. Connect the USB conductors according to the terminal diagram (see chapter
19.1 Connection overview terminal assignment KB2)
2. Make sure the pin assignment is correct.
7.4.3
Grounding the device
Connect the shield with the cable lug to the PA ground connection (see chapter
19.1 Connection overview terminal assignment KB2
DANGER
DANGER