公开(公告)号：US4691384A

公开(公告)日：1987-09-01

申请号：US782888

申请日：1985-10-02

申请人： Tommy L. Jobe

发明人： Tommy L. Jobe

IPC分类号： H03H11/38 ,  H04L25/26 ,  H03H5/12

CPC分类号： H04L25/26 ,  H03H11/38

摘要： A multi-drop communication link, consisting of a master and a plurality of slaves is intrinsically safe for use in a hazardous environment. Slaves are in parallel and communicate with the master through transmit and receive shunt-diode safety barriers. An opto-coupler interface is provided between each slave and the transmit and receive circuits communicating with the master. The opto-couplers comprise infrared emitter-detector pairs which can be spaced apart by an intrinsically safe distance.

摘要翻译： 由主机和多个从机组成的多点通信链路本质上是安全的，可用于危险环境。 从机并联并通过发射和接收并联二极管安全屏障与主机通信。 在每个从站和与主站通信的发射和接收电路之间提供光耦合器接口。 光耦合器包括可通过本质安全距离间隔开的红外发射器 - 检测器对。