Power Supply Concept

When using F I/O modules, the system and field supply must be protected against surge voltages (burst and surge) in accordance with EN 61326-3-1.

If these requirements are specific to an I/O module, they are described in the respective & Product Manual. Otherwise, the following general requirements apply.

A filter module must be used for each system and field supply input point with a nominal voltage of 24 VDC:

• Use a power supply filter (750-626/xxx-xxx) for the system supply.
• Use a field supply filter (750-624/xxx-xxx) or a power supply filter (750-626/xxx-xxx) for the field supply.

Power Supply Concept Example