A safety switch input diagnosis device includes a circuit formed from a series connection of an emergency stop switch and a line having a resistor. A connection state of the emergency stop switch and failure modes of the lines are diagnosed on the basis of a voltage value at one end of the circuit. Consequently, an operation of the switch and failure modes of a circuit relating to the switch can be diagnosed.

A safety switch input diagnosis device includes a circuit formed from a series connection of an emergency stop switch and a line having a resistor. A connection state of the emergency stop switch and failure modes of the lines are diagnosed on the basis of a voltage value at one end of the circuit. Consequently, an operation of the switch and failure modes of a circuit relating to the switch can be diagnosed.

A fuseless switch for a cross phase of a power line communication (PLC) network includes a movable contactor, a switch, an electromagnetic tripper, a base and a microcontroller. The microcontroller further includes a low-voltage coupler electrically connected to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal, so that a network connection signal can cross phases to complete the transmission of information. When a PLC network signal passes through the fuseless switch, the signal proceeds from the low-voltage coupler without being affected or attenuated by the original fuseless switch circuit, so as to overcome the issue of transmitting signals through the power line to other circuits.

A fuseless switch for a cross phase of a power line communication (PLC) network includes a movable contactor, a switch, an electromagnetic tripper, a base and a microcontroller. The microcontroller further includes a low-voltage coupler electrically connected to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal, so that a network connection signal can cross phases to complete the transmission of information. When a PLC network signal passes through the fuseless switch, the signal proceeds from the low-voltage coupler without being affected or attenuated by the original fuseless switch circuit, so as to overcome the issue of transmitting signals through the power line to other circuits.

A safety switch input diagnosis device includes a circuit formed from a series connection of an emergency stop switch and a line having a resistor. A connection state of the emergency stop switch and failure modes of the lines are diagnosed on the basis of a voltage value at one end of the circuit. Consequently, an operation of the switch and failure modes of a circuit relating to the switch can be diagnosed.

A safety switch input diagnosis device includes a circuit formed from a series connection of an emergency stop switch and a line having a resistor. A connection state of the emergency stop switch and failure modes of the lines are diagnosed on the basis of a voltage value at one end of the circuit. Consequently, an operation of the switch and failure modes of a circuit relating to the switch can be diagnosed.

A power transmission apparatus includes a power delivery unit generating a power, a load unit receiving the power, a cable, at least a connector, at least a power switch, and a communication interface. The power delivery unit and the load unit is coupled by the connector and the cable, and the power is delivered through the cable and the connector. A voltage threshold is determined according to a delivery current of the power or a load current of the load unit. When a voltage difference between a delivery voltage of the power and a load voltage of the load unit is larger than the voltage threshold, the power switch is turned OFF, wherein information of one of the delivery voltage, the load voltage, the delivery current, and/or the load current is provided through the communication interface.

A fuseless switch for a cross phase of a power line communication (PLC) network includes a movable contactor, a switch, an electromagnetic tripper, a base and a microcontroller. The microcontroller further includes a low-voltage coupler electrically connected to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal, so that a network connection signal can cross phases to complete the transmission of information. When a PLC network signal passes through the fuseless switch, the signal proceeds from the low-voltage coupler without being affected or attenuated by the original fuseless switch circuit, so as to overcome the issue of transmitting signals through the power line to other circuits.

A fuseless switch for a cross phase of a power line communication (PLC) network includes a movable contactor, a switch, an electromagnetic tripper, a base and a microcontroller. The microcontroller further includes a low-voltage coupler electrically connected to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal, so that a network connection signal can cross phases to complete the transmission of information. When a PLC network signal passes through the fuseless switch, the signal proceeds from the low-voltage coupler without being affected or attenuated by the original fuseless switch circuit, so as to overcome the issue of transmitting signals through the power line to other circuits.

A power transmission apparatus includes a power delivery unit generating a power, a load unit receiving the power, a cable, at least a connector, at least a power switch, and a communication interface. The power delivery unit and the load unit is coupled by the connector and the cable, and the power is delivered through the cable and the connector. A voltage threshold is determined according to a delivery current of the power or a load current of the load unit. When a voltage difference between a delivery voltage of the power and a load voltage of the load unit is larger than the voltage threshold, the power switch is turned OFF, wherein information of one of the delivery voltage, the load voltage, the delivery current, and/or the load current is provided through the communication interface.