I/O module for a databus

Input/output modules for a data bus which can be set up on an assembly rail next to each other, each module comprising a base contact block, which has, in the direction of the assembly rail, several connection planes next to each other and at a parallel distance to each other with contact points for the parallel wiring of a bus subscriber per connection plane, and joined with an I/O electronics device, which can be plugged into the base contact block, which device joins the bus subscriber with the serial data bus line, which passes through the base contact block,

• is hereby characterized in that
• the insulating housing of the base contact block has a flat bottom channel which extends parallel to and next to assembly rail over the entire width of the base contact block, a printed circuit board extending over the entire width of the base contact block is arranged in the bottom channel, and is preferably inserted into it, and the printed board has tracks for the data bus lines and for the current supply of the I/O electronics such that the I/O electronic modules can be plugged into the printed circuit from the top in order to contact the tracks, and the tracks of the adjacent base contact block set up on the assembly rail can be combined by means of a U-shaped electronics bridging component, which can be plugged into the end pieces of adjacent circuit boards from the top,
• I/O electronic modules have on one side surface, which does not lie opposite the bottom channel, rigidly arranged contacts,
• which close a current path to the contact points of the assigned connection planes of the base contact block when the I/O electronic modules are plugged onto the printed circuits arranged in the bottom channel.

Rail-mounted input/output modules for a data bus mounted on a carrier rail next to each other, each module comprising:

• a base contact block which has, in a direction of the carrier rail, several connection planes next to each other at a parallel distance to each other with contact points for the parallel wiring of a bus subscriber per connection plane,
• the insulating housing of the base contact block has a flat bottom channel which extends parallel to said carrier rail over the entire width of the base contact block, and a printed circuit board having tracks for the data bus lines and for the current supply to any electronics is arranged in said bottom channel and extends over the entire width of the base contact block in order that the tracks of the printed circuit board of one base contact block can be connected to the tracks of the printed circuit board of an adjacent base contact block by means of U-shaped electronic bridging elements,
• each connection plane of each individual groups of connection planes of said base contact block has its own I/O electronic module which can be plugged into the printed circuit board from the top in order to contact its tracks for the data bus lines and to contact its tracks for the electronics current supply as well as to connect the bus subscriber wired to the connection plane of said base contact block to the I/O electronic module associated to the same connection plane or to the same group of connection planes.