Siemens 6SL3210-1SB11-0UA0 [258/318] Overcurrent protection

Siemens 6SL3210-1SE11-7UA0 [258/318] Overcurrent protection
Cabinet design and EMC for components, Blocksize format
9.5 24 V DC Supply Voltage
Manual
258 Manual, 01/2011, 6SL3097-4AC10-0BP2
9.5.2 Overcurrent Protection
Cables that are located on the primary and the primary side of the power supply unit must be
protected from overcurrent.
Primary side protection conforms to the manufacturer's instructions.
Secondary side protection depends on the practical circumstances. Make sure you observe
these points:
Loading due to loads, including simultaneity factor in response to machine operation
Current carrying capacity of the conductors used and cables in normal and short-circuit
conditions
Ambient temperature
Cable bundling (laying cables in the duct)
Cable laying method according to EN 60204-1
CAUTION
Laying of cables
Lay connected signal and supply cables such that the ventilation slots on the devices
are not covered.
Do not lay non-shielded cables parallel to power cables.
EN 60204-1, Section 14, can be used to determine the overcurrent protection devices
Circuit breakers from the Siemens LV 1 and LV 1T catalogs are recommended as
overcurrent protection devices on the primary side.
Miniature circuit breakers or SITOP select 6EP1961-2BA00 are recommended as
overcurrent protection devices on the secondary side.
Miniature circuit breakers are recommended as overcurrent protection devices for the cables
and busbars. They can be selected from the Siemens LV 1 and LV 1T catalogs.
The ground potential M must be connected to the protective conductor system (DVC A).
When selecting the circuit breaker, the following standards must be carefully observed:
Standards
EN 61800-5-1 EN 60204-1 IEC 60364-5-52
IEC 60287-1 to -3 EN 60228 UL 508C
Conditions
Ambient temperature 55 °C
Limiting conductor temperature ≥ 75 °C for operation with the rated load current
10 m for the 24 V supply cables Maximum cable length:
30 m for signal lines without additional connections
Lay the cables so that
no more than 1 conductor pair is bundled
Route 24 V conductors/cables separately from cables and conductors that can conduct
operating currents.

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