SMC-15A low voltage switch status live detection unit is an instrument controlled by a single chip microcomputer to detect the closed or disconnected state of low voltage switch contacts in real time. This instrument can detect the closed or disconnected state of 8 low voltage switches at the same time, and its switch state is transmitted to the main device through the serial port. At the same time, the device can be equipped with a GSM SMS module, which can send Chinese character information describing the switch position change to the dispatcher and the on-duty personnel when the switch position changes to close or open.
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