General technical data
Hardware - SIMADYN D 1-13
Edition 08.2005
1
Power supply potentials
For SIMADYN D, the grounds of all secondary voltages must be
connected together and connected to the subrack housing and grounded;
this enhances the discharge of noise signals and voltages.
230/115 V AC
24 V DC
PE
Housing
+ 5 V
+ 15 V
- 15 V
Ground
Using clocked power supplies
If a clocked power supply is used for the 24V supply, the rated output of
the clocked power supply units must be designed for the inrush current of
SIMADYN D (the factor is 200 % of the rated current). Otherwise, the
clocked power supply can ramp-up along the short-circuit current limiting
and undefined conditions can occur.
1.1.17 Subracks
• The subracks must be connected to the grounding/potential bonding
rail using the shortest possible 6mm
2
cable.
• All of the boards must be screwed into subracks. This is also required
during the commissioning phase!
• Empty slots must be provided with SIMADYN D slot covers.
• If modules are inserted in an adapter during the commissioning
phase, the front panel must be electrically connected to the housing
through the shortest possible path.
• Modules may neither be removed nor inserted under voltage.
• The connectors for serial interfaces must be screwed to the front
panel.
• The maximum temperature of the air drawn-in by the subrack is 55ºC.
The subrack must be mounted so that air can freely circulate. It must
be ensured that heat cannot build-up (no hotspots).
• The air drawn-in by the subrack must be as dust-free as possible.
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