The following list identifies considerations required for startup of a system following certain
events.
● If the system starts up again following a voltage drop or power failure, all hazardous
operating states must be prevented from occurring. If necessary, force an EMERGENCY
OFF.
● If the system starts up again after the EMERGENCY OFF apparatus is released, the startup
must not be unchecked or undefined.
4.4.3
Mains voltage
Rules for the line voltage
The following list indicates what you must take into account for the line voltage:
● For stationary installations or systems that do not have all-pole line disconnect switches,
the building installation must include a line disconnect switch or a fuse.
● For load power supplies and power supply modules, the rated voltage range set must
correspond to the local line voltage.
● For all circuits, the fluctuation/deviation of the line voltage from the rated value must be
within the permitted tolerance (see the technical data for the SIMOTION D and SINAMICS
modules).
24 VDC supply
For...
Requirement
Buildings
External lightning protec‐
tion
Install lightning protection (e.g. light‐
ning conductors).
24 VDC supply lines, signal lines
Internal lightning protec‐
tion
24 V supply
safe (electrical) isolation of the extra-low voltage
Protection against external electrical interference
The table below shows how you must protect your system against electrical interference or
faults.
Table 4-2
External electrical phenomena
For ...
Requirement
All plant or systems in which the compo‐
nent is installed
The plant or system is connected to a protective conductor
for the discharge of electromagnetic interference.
Supply, signal, and bus lines
The wiring arrangement and installation complies with
EMC regulations.
Signal and bus lines
A cable or wire break cannot lead to undefined states in
the plant or system.
Connecting
4.4 Power supply
SIMOTION D4x5-2
64
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
