PCB connection unit

1. An electronic device comprising:

a first base printed circuit board (PCB);

a first edge card socket mounted on said base PCB, said socket having PCB contacts; and

a PCB connection unit comprising a printed circuit board having opposing metal contacts connected by metal traces, said unit being slideably connectable to said first edge card socket such that at least some of said metal contacts mechanically and electrically contact said first edge card socket PCB contacts, and adapted to be slideably inserted into a second edge card socket mounted on a second base PCB such that at least some others of said metal contacts mechanically and electrically contact PCB contacts in said second edge card socket,

wherein said first edge card socket comprises an opening to allow said PCB connection unit to reciprocally slide forward and backwards through said first edge card socket to make and break an electrical connection between said first base PCB and said second base PCB.

2. The device according to claim 1 wherein said PCB connection unit includes a handle.

3. The device according to claim 1 wherein said first edge card socket includes an opening for slideably connecting said PCB connection unit.

4. The device according to claim 1 wherein said second edge card socket includes an opening for slideably inserting said PCB connection unit.

5. The device according to claim 1 wherein said PCB connection unit includes a housing.

6. The device according to claim 1 wherein said first base PCB is in a first module and said second base PCB is in a second module.

7. The device according to claim 6 wherein said first module includes a window for accessing said connector.

8. The device according to claim 6 wherein said first module and said second module include slots.

9. The device according to claim 6 wherein said first module and said second module are components in a programmable logic controller (PLC).

10. The device according to claim 1 wherein said second base PCB is a component in a second electronic device.

11. A printed circuit board (PCB) connection unit comprising:

a printed circuit board (PCB) having opposing metal contacts connected by metal traces, said unit being slideably connectable to a first edge card socket mounted on a first base PCB such that at least some of said metal contacts mechanically and electrically contact PCB contacts in said first edge card socket, and adapted to be slideably inserted into a second edge card socket mounted on a second base PCB such that at least some others of said metal contacts mechanically and electrically contact PCB contacts in said second edge card socket

wherein said first edge card socket comprises an opening to allow said PCB connection unit to reciprocally slide forward and backwards through said first edge card socket to make and break an electrical connection between said first base PCB and said second base PCB.

12. A printed circuit board (PCB) connection unit comprising:

a connecting printed circuit board (PCB) to slidably connect between a first edge card socket mounted on a first electronic device and a second edge card socket mounted on a second electronic device, said connecting printed circuit board having a first set of metal contacts to connect to said first edge card socket and a second set of metal contacts, connected to said first set of metal contacts, to connect to said second edge card socket,

wherein said first edge card socket comprises an opening to allow said PCB connection unit to reciprocally slide through forward and backwards said first edge card socket to make and break an electrical connection between said first electronic device and said second electronic device.