Siemens PPU 26x.3 series Manual page 90

Ppu and components
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Interface description
6.5 Digital inputs/outputs
Parameter
Signal propagation times
Galvanic isolation
90
Value
L → H: 50 μs
H → L: 200 μs
Yes: The reference potential is terminal 1M/1P24 (24
VDC)
Manual, 10/2015, 6FC5397-2DP40-5BA3
PPU and components

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