Siemens SINUMERIK ONE NCU 1740 Equipment Manual page 61

• Tenir compte du rayon de courbure admissible des câbles.
• Pose les câbles de manière à ce qu'ils ne pincent pas les câbles.
• Pose les câbles en évitant tout contact avec des arrêtes abrasives.
Note
When connecting an external 24 V DC power supply to the interfaces, this must satisfy the
requirements of a protective extra low voltage (PELV) according to UL 61010. A series fuse must
also be used which reliably trips within 120 seconds at an ambient temperature of 0 °C when a
short-circuit occurs.
For a primary supply of the power supply used from OVC III circuits up to 600 V AC (line to neutral
voltage), it must be ensured that the contact gap of the fuse – or the individual fault-proof circuit
– is 3.0 mm according to UL 61010.
When using an external power supply, ensure that the fuse used has a trip rating that
corresponds to the maximum possible short-term short-circuit current of the power supply unit
being used.
Table 8-2
Characteristics
Connector type
Number of cables that can be connected
Connectable cable types and conductor cross-sec‐
tions
Stripped length
Tool
Tightening torque
Max. current carrying capacity, incl. loop-through
Max. cable length
This value must be taken into consideration for the current-carrying capacity of the power supply cable.
*)
The following cable lugs may be used:
• Crimped cable lug to DIN 46234
• Pressed cable lug to DIN 46235
• Tube-type cable lug to SN 71322
• Tube-type cable lug "Klauke R Series", UL Category ZMVV
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA
X124 interface
Rigid
Flexible
Flexible, with end sleeve without plastic
sleeve
Flexible, with end sleeve with plastic sleeve
AWG/kcmil
Version
4-pin screw-type terminal
1
1.3 mm² ... 2.5 mm²
1.3 mm² ... 2.5 mm²
1.3 mm² ... 2.5 mm²
1.3 mm² ... 2.5 mm²
16 ... 14
6 ... 7 mm
Screwdriver 0.5 x 3 mm (M2.5)
0.4 to 0.5 Nm
20 A (15 A according to UL/CSA)
*)
10 m
Connecting
8.5 Power supply
61