TIMOTHY R PIPER
Engineers in Monroeville, PA

6033268, Mar 7, 2000

Apr 30, 1997

8/846946

Timothy R. Piper - Monroeville PA
Robert T. Kissell - Sarver PA
Daniel A. Hosko - Pittsburgh PA
Daniel L. Simon - Glenshaw PA
Matthew B. Horne - Allison Park PA

Westinghouse Electric Corporation - Pittsburgh PA

H01R 922

439715

The bases of modular units of an I/O system are connected serially by two-way electrical and mechanical connectors so that units can be inserted into and removed from lines of units connected to a controller without removal or movement of any other unit. By two-way connector is meant that confronting connectors on adjacent units disengage by movement in the same or opposite direction from that in which they engaged. The electrical connectors distribute a communication bus and power to the modular units. In addition, plug-in electronics modules and personality modules, with the latter providing selective interfaces between the electronics modules and banks of terminals for landing field wiring, have a common locking mechanism for locking both in sockets in the bases. The locking mechanism includes at least one locking assembly having a shaft rotatable from a free end of the electronics module for rotating a paddle into and out of engagement with a catch in the base. Overlapping shoulders prevent removal of the personality module without first unlatching and removing the electronics module.

5984734, Nov 16, 1999

Apr 30, 1997

8/846943

Timothy R. Piper - Monroeville PA
Matthew Bernard Horne - Allison Park PA
R. T. Kissell - Natrona Heights PA
Daniel A. Hosko - Pittsburgh PA

Westinghouse Process Control, Inc. - Pittsburgh PA

H01R 922

439717

A modular input/output (I/O) unit utilizes plug-in personality modules to provide any one of a variety of interfaces between I/O signal processing cards mounted in plug-in electronics module and a bank of terminals providing connections for field wiring.