Siemens 6SL3210-1SE14-1UA0 [259/318] Overvoltage protection

Siemens 6SL3210-1SE31-8UA0 [259/318] Overvoltage protection
Cabinet design and EMC for components, Blocksize format
9.5 24 V DC Supply Voltage
Manual
Manual, 01/2011, 6SL3097-4AC10-0BP2
259
Table 9- 1 MCBs by conductor cross-section and temperature
Conductor cross-section Max. value up to 40 °C Max. value up to 55 °C
1.5 mm
2
10 A 6 A
2.5 mm
2
16 A 10 A
4 mm
2
25 A 16 A
6 mm
2
32 A 20 A
Select the tripping characteristic of the MCBs to protect the loads against the maximum
current provided in the event of a short circuit of the supply unit.
9.5.3 Overvoltage protection
Overvoltage protection devices are needed if long cables are used.
Supply cables > 10 m
Signal cables > 30 m
The following Weidmüller overvoltage protectors are recommended for protecting the
components' 24 V power supply and the 24 V signal cables from overvoltage:
Table 9- 2 Recommendations for overvoltage protection
DC power supply 24 V signal cables
Weidmüller
Item no.: PU III R 24V
Order number: 8860360000
Weidmüller
Item no.: MCZ OVP TAZ
Order number: 844915 0000
Weidmüller GmbH & Co. KG
An der Talle 89
33102 Paderborn, Germany
Phone +49 (0)5252 960 0
Fax +49 (0)5252 960 116
http://www.weidmueller.com
The overvoltage protectors must always be placed next to the area to be protected, e.g. at
the entry point to the control cabinet.

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