SMC Networks EX250-SCF1-X200 Operation Manual page 27

4. Waterproof cap
Mounted on the unused ports of the Input block, Output block and Power block.
Proper use of this waterproof cap can achieve IP67 enclosure. (The waterproof caps are delivered together
with the Power block as accessories.)
Note
Tighten the waterproof cap with the specified tightening torque. (0.05 Nm for M8,0.1 Nm for M12)
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No.EX※※-OMU1012