Beckhoff EL6631-0010 - 3 Mounting and Wiring; Instructions for ESD Protection; Note - Power Supply

Mounting and wiring
EL6631-001020 Version: 3.4.0
3 Mounting and wiring
3.1 Instructions for ESD protection
NOTICE
Destruction of the devices by electrostatic discharge possible!
The devices contain components at risk from electrostatic discharge caused by improper handling.
• Please ensure you are electrostatically discharged and avoid touching the contacts of the device directly.
• Avoid contact with highly insulating materials (synthetic fibers, plastic film etc.).
• Surroundings (working place, packaging and personnel) should by grounded probably, when handling
with the devices.
• Each assembly must be terminated at the right hand end with an EL9011 or EL9012 bus end cap, to
ensure the protection class and ESD protection.
Fig.6: Spring contacts of the Beckhoff I/O components
3.2 Note - Power supply
WARNING
Power supply from SELV/PELV power supply unit!
SELV/PELV circuits (Safety Extra Low Voltage, Protective Extra Low Voltage) according to
IEC61010-2-201 must be used to supply this device.
Notes:
• SELV/PELV circuits may give rise to further requirements from standards such as IEC60204-1 et al, for
example with regard to cable spacing and insulation.
• A SELV (Safety Extra Low Voltage) supply provides safe electrical isolation and limitation of the voltage
without a connection to the protective conductor,
a PELV (Protective Extra Low Voltage) supply also requires a safe connection to the protective
conductor.