发明名称 |
NETWORK LOOP MONITOR |
摘要 |
A network loop monitor (10) is disclosed which comprises an RS485 port (16) for connection to a host which receives and transmits data. The port (16) comprises termination jumpers (14), a transmitter/receiver (34) and an isolator (36). The monitor (10) includes two further RS485 ports (18, 20) each of which has a termination (26, 28), a transmitter/receiver (42, 44) and an isolator (38, 40). A relay (22) controls contacts (24) in the line pair (12). Router logic (32) controlled by a microprocessor (30) determines the status of the loop monitor. |
申请公布号 |
WO2005069537(A3) |
申请公布日期 |
2005.09.09 |
申请号 |
WO2004ZA00159 |
申请日期 |
2004.12.21 |
申请人 |
DENOON-STEVENS, DAVID;DE VILLIERS, NEELS, PAUL |
发明人 |
DENOON-STEVENS, DAVID;DE VILLIERS, NEELS, PAUL |
分类号 |
H04L12/403;H04L12/42;H04L12/437;H04L29/14 |
主分类号 |
H04L12/403 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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