The connectors are produced in stack-through and non stack-through versions. Configured as 32 + 32 way, the connector supports 8 bit systems; while a 20 + 20 way device combined with the 32 + 32 way offers support for 16 bit systems. Components are produced in stack-through and non stack-through versions; the stack-through option allows many modules to be stacked without the need for multiple connector types.