| 摘要 |
A method and an arrangement for monitoring connections of a switch intended for activating a safety function, the switch (S2) having at least two poles, the arrangement comprising means for supplying voltages to first sides of two poles of the switch (S2) through first connections (30), means for monitoring the voltages supplied through the switch (S2) and further from second sides of said two poles of the switch to a device through second connections (40), means (D1, S1) for forming a voltage difference between the voltages to be supplied to the first sides of said two poles of the switch (S2), and means (21, 22) for detecting a connection failure when the difference between the voltages supplied to the device (20) does not correspond with the formed voltage difference or when the difference between the voltages supplied to the device is substantially zero.
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