Beckhoff AX8000 Series Operating Instructions Manual page 78

Electrical installation
UL-compliant
9.13.2
External fuse protection
Internal fuse protection
Fuse protection brake resistor
[+]
78 ───
Circuit breakers are not permitted
Circuit breakers are not permitted for external fusing of the UL net-
work.
Use exclusively the UL mains fuses specified in this chapter.
Fuse holders with UL approval
Before implementing a UL configuration, it is mandatory that you
contact your UL certificate authority and discuss the necessary
boundary conditions. When using fuse holders, care must be taken
that they have also been tested and manufactured in accordance
with the applicable standards of the UL certificate authority.
The integrated protection against short circuit is no substitute for the
external mains protection. The fusing must comply with the manu-
facturer's data as well as the national and international regulations
and laws.
Use UL mains fuses of the class "J".
For alternatives to the UL fuses of the class "J", be sure to refer to
the UL standard "UL 508A, chapter SB4.2.3, exception no. 1".
Fuse protection
Maximum AC supply
Maximum 24 V supply
Fuse protection
24 V system voltage /
periphery
Internal brake resistor
Use DC direct current fuses of the operating class "aR"
Example DC direct current fuses of the operating class „aR"
• Manufacturer Siba
• Size 14 mm x 51 mm, DC 700 V, 30/50 kA
Brake resistor Fuse protec-
tion
AX2090-BW80-1000 10 A
AX2090-BW80-1600
AX2090-BW80-2000 20 A
AX2090-BW80-3200
AX2090-BW80-6000 25 A
AX8000
AX8620 AX8420
25 A 50 A
20 A
Fuse
electronic
electronic
Cable
ZK4000-2101-2xxx with
1,5 mm²
ZK4000-2102-2xxx with
2,5 mm²
ZK4000-210x-2xxx with 4
mm²
Version: 1.1