Safety switch
AssigneeEuchner GmbH + Co. KG
InventorsTimo Siefert, Melissa Joos, Frederic Hahn, Zeiler Gerd
Life of this patent
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Abstract
A series connection having multiple safety switches. Here, the series connection includes wiring connecting the safety switches. The safety switches can output signals. Depending on the registration of these signals by additional safety switches of the series connection it will be detected whether the wiring is laid out for connecting a master, and whether such a master is connected. Depending on this, the operation of the safety switches is predetermined.
Claims12
A series connection (1) having multiple safety switches (2), with the series connection (1) possessing wiring connecting the safety switches (2), characterized in that signals can be output by the safety switches (2), wherein it is detected, depending on the registration of these signals by additional safety switches (2) of the series connection (1), whether the wiring is laid out for connecting a master (6), and whether such a master (6) is connected, and that depending on this, the operation of the safety switches (2) is predetermined by the safety switches themselves, wherein, in the case that no master exists, the series connection is started and enters into a normal operation phase without the master, wherein each safety switch (2) includes a communications port (10), wherein only in case of a design for operation of the series connection (1) with the master (6) a line (8) is routed from each communications port (10) to a diagnostics line (7), wherein the master (6) can be connected to the diagnostics line (7), wherein in the event of operation without the master (6), the communications ports (10) of the safety switches (2) are operated as message outputs, and wherein each safety switch (2) includes a redundant input and output structure, via which switching signals generated in the safety switches (2) can be transmitted, wherein redundant outputs (4) of a safety switch (2) are connected to redundant inputs (3) of a downstream safety switch (2) for forming the series connection (1).
A method for operating a series connection (1) having multiple safety switches (2), with the series connection (1) having wiring connecting the safety switches (2), characterized in that the safety switches (2) can output signals, wherein depending on the registration of these signals by additional safety switches (2) of the series connection (1) it will be detected whether the wiring is laid out for connecting a master (6) and whether such a master (6) is connected, and that depending on this, the operation of the safety switches (2) is predetermined by the safety switches themselves, wherein, in the case that no master exists, the series connection is started and enters into a normal operation phase without the master, wherein each safety switch (2) includes a communications port (10), wherein only in case of a design for operation of the series connection (1) with the master (6) a line (8) is routed from each communications port (10) to a diagnostics line (7), wherein the master (6) can be connected to the diagnostics line (7), wherein in the event of operation without the master (6), the communications ports (10) of the safety switches (2) are operated as message outputs, and wherein each safety switch (2) includes a redundant input and output structure, via which switching signals generated in the safety switches (2) can be transmitted, wherein redundant outputs (4) of a safety switch (2) are connected to redundant inputs (3) of a downstream safety switch (2) for forming the series connection (1).
Dependencies are inferred from the claim text.