Three wire interface for field wiring of on/off sensors,申请号US19990361764-传众专利搜索

Three wire interface for field wiring of on/off sensors

申请公布号：US6559653(B2)

申请号：US19990361764

申请日期：1999.07.27

申请公布日期：2003.05.06

申请人：

BECS TECHNOLOGY, INC.

发明人：MACKE, SR. DAVID C.;CHAMBERLAIN ROGER D.

分类号：H03K17/94;(IPC1-7):H01H31/02

主分类号：H03K17/94

摘要：A three-wire sensor interface for field wiring of conventional on/off type control sensors that delivers power to the sensor, provides a normally open control output from the sensor and, concurrently, provides a normally closed control output from the sensor. The sensor interface includes a plurality of external terminals including a normally open external terminal for electrically connecting to zero, one, or more normally open load devices to control the operation of the normally open load device, and a normally closed external terminal for electrically connecting to zero, one, or more normally closed load devices to control the operation of the normally closed load device. A plurality of interface terminals are preferably electrically coupled between the sensor interface and the sensor and include a normally open control terminal and a normally closed control terminal. The sensor interface further includes an interface circuit adapted to receive the control signals from the sensor subsystem through the normally open and normally closed control terminals and to couple these control signals to the appropriate normally open or normally closed external terminals for controlling the external load devices.