The Extension board is connected to the Master board through the M-connector.
With the power source selector, you choose to get power from either the Master board or the optional power input of the Extension board.
Each Extension board supports a mix of up to 7 I/O boards, of the type Input, LED, and 7-Segment.
Test points are easily accessible for troubleshooting purposes.
Dimensions: 94x59mm (3.70×2.32in).
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