The ET 200SP system can be operated with any number of slot gaps (BU slot without inserted I/O module). Applications for this include:

• Partial commissioning
• Prewired but unequipped options

To protect against damage, such slot gaps must be covered by a BU cover.

Within the BU cover, an equipment labeling plate for identification of the I/O module planned for this slot can be stored.

Versions:

• For BaseUnits with a width of 15 mm (pack containing 5 BU covers)
• For BaseUnits with a width of 20 mm (pack containing 5 BU covers)