Electrical Safety

• Disconnect all power supplies from the product before performing any installation, repair or maintenance.
• Make sure the products do not carry any voltage before starting work.

• For non-hazardous active voltage per EN/UL/IEC 61010-1, SELV/PELV power supplies shall be used.
• When configuring the system, make sure that the maximum total current of the field supply of the node is not exceeded. Where needed, include an additional supply module.
• When configuring the system, make sure that the maximum total current of the system supply of the node is not exceeded. Where needed, include an additional supply module.
• Pay attention to the permissible voltage and frequency ranges of the products when using different supplies.
• Plan for voltage buffering if the requirement for voltage buffering according to EN 61131-2 is to be met.
• Take suitable measures to protect against overload (e.g., a supply module with fuse or an external fuse).
• In mixed operation, always separate the areas in the XTR version and the areas with the standard version with the separate potential supply modules for the field supply and separate power supply units of the respective version in different potential groups. Do not mix the versions within a potential group.

• Establish sufficient grounding. Make sure there is a flawless electrical connection between the DIN-rail and frame / additional enclosure.
• Connect the DIN-rail to protective earth (PE) when using hazardous active voltages.
• In systems operated within the scope of UL, only use UL-approved fuses.

• To minimize interference (e.g., by electromagnetic interference), maintain a spatial separation between control, signal and data lines and the power supply lines.
• SELV/PELV circuits must be safely disconnected from circuits with hazardous active voltage or all connecting cables must be designed for the maximum current load.
• Always design the connection cables for the maximum anticipated current load.
• High currents and the inherent heat generated by the product can cause additional heat generation at the clamping point up to 25 K above the expected ambient temperature. Plan for a correspondingly higher temperature range for the connecting cables, or reduce inherent heat by selecting larger conductor cross-sections.
• Only one conductor may be connected to each connection point (e.g., CAGE CLAMP^® connection).

• When working on the system (e.g., during maintenance), protect the facility part in question from accidental or unauthorized restart.