D3-DU 3xx/A, /BSafety notes
Project engineering manual V1.09
20
© KEBA 2021
● Illegal changes
● Improper use
● Disregard of instructions in this document
Information
If information about potentially dangerous incidents of the machine or sys-
tem is obtained in the course of product monitoring obligation, which could
be related to products delivered by KEBA, report these promptly to KEBA.
Furthermore, it is asked to send all safety-oriented products that have failed
due to a defect for purposes of analysis to KEBA, even if they are consid-
ered as non-repairable
2.3 Safety instructions for personal safety
WARNING!
Danger of personal injury due to electric shock
● Cut-off control from all power supplies during installation and service. If
the DU 3xx/x is supplied by a D3-DP 3xx/x whose both supply terminals
(Line IN and Line IN Aux) must be separated from power (e.g. via
switching a joint main switch mechanism).
● If the DU 3xx/x is supplied by a D3-DP 3xx/x 3 minutes have to be
waited after switching-off due to dangerous residual voltage at the d.c.
link. Afterwards the absence of voltage has to be verified. Only then the
supply rails and the remaining covers may be opened.
● Supply the control with a D3-DP 3xx/x or exclusively from power sources
that have a protective low voltage (e.g. SELV or PELV according to EN
61131-2). If a SELV power source is used, it has to be carried out as
PELV power source through grounding of the minus pole (grounding!)
● Protective low voltage circuits must always be installed safely insulated
separated from circuits with dangerous voltage.
CAUTION!
Note fire hazard during module failure
If an external power supply instead of D3-DP 3xx/x is used for 24 V DC sup-
ply of the DU 3xx/x, a 20 A fuse for the 24 V DC power supply for the final
application must be provided!
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