Why is a 16 pin header suggested for use with SwitchBlox Rugged, which has an 18 pin stacking header?

BotBlox Hardware
1

In the SwitchBlox Rugged the pin header suggested for stacking two boards is 16 positions while the stacking header on SwitchBlox is 18 positions.

Is this correct?

2

There is an 18 pin header on SwitchBlox Rugged revision F, but the pin header is only 16 pins. This is because there are two positions to plug in the pin header for SwitchBlox Rugged (left-side oriented and right-side oriented).

This is described in the datasheet.

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We did this because it was a smart way either connect the management interface between two boards or not. For SwitchBlox Rugged back-to-back applications, you don’t want the management bus to be shared between both boards, and using a 16 pin header allows us to skip two pins.