Beckhoff CX2900-0192, Руководство пользователя

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Commissioning
CX2900-0192 21 Version: 1.4
5.2.2 Observe the UL requirements
The Embedded PCs CX20xx and the power supply unit CX2100-0004 are UL508 certified. The
corresponding UL label can be found on the type plate.
The CX20xx Embedded PCs can thus be used in areas in which special UL requirements have to be met.
UL requirements:
• The Embedded PCs must not be connected to unlimited voltage sources.
• Embedded PCs may only be supplied from a 24 V DC voltage source. The voltage source must be
insulated and protected with a fuse of maximum 4 A (corresponding to UL248).
• Or the power supply must originate from a voltage source that corresponds to NEC class 2. An NEC
class 2 voltage source must not be connected in series or parallel with another NEC class 2 voltage
source.