Patent ID: 9161103
Filing Date: 2015-10-13
Classification: F15B,H04Q

Abstract:
1. A switch module arranged and adapted to report a position of a moveable element external to the switch module, the switch module comprising: a first external connection, a second external connection, and a third external connection; a dry contact relay having a relay contact position responsive to a position of a component external to the switch module, the dry contact relay having a common connection, a normally open connection and a normally closed connection, where the normally open connection corresponds to a first position of the moveable element and the normally closed connection corresponding to a second position of the moveable; a NAMUR circuit having a first input connection pair and a first output connection pair; an electrical connection from the normally open connection of the dry relay to a first input of the first input connection pair of the NAMUR circuit; a selector operable to connect the common connection of the dry contact relay to i) a null contact of the selector or ii) a second input of the first input connection pair of the NAMUR circuit; a second electrical connection from the first output of the NAMUR circuit to one of the first external connection or the second external connection; and a third electrical connection between the second output of the NAMUR circuit to the third external connection; a first jumper that removeably couples the first external connection to the normally open connection of the relay; a second jumper that removeably couples second external connection to the normally closed connection of the relay; and a third jumper that removeably couples the third external connection to the common connection of the relay, wherein the position of the moveable element is observable via two or more of the external connections.