Allen-Bradley 1794-OB16P Flex I/O 16-Channel Sourcing Output Module By wayne No Comments on Allen-Bradley 1794-OB16P Flex I/O 16-Channel Sourcing Output Module 2 Min Read The Allen-Bradley 1794-OB16P provides 16 electronically fused sourcing outputs. This module features a 0.5 ms off-to-on delay.