UL requirements

The CX20x3 Embedded PCs are UL-certified. The corresponding UL label can be found on the name plate.

The Embedded PCs CX20x3 can thus be used in areas in which special UL requirements have to be met. These requirements apply to the system voltage (Us) and the power contacts (Up). Applications without special UL requirements are not affected by UL regulations.

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.