CN209994385U

CN209994385U - Double-network-port embedded industrial control terminal supporting POE power supply

Info

Publication number: CN209994385U
Application number: CN201920998680.9U
Authority: CN
Inventors: 李鹏
Original assignee: Ningbo Ruihui Intelligent Technology Co Ltd
Current assignee: Ningbo Ruihui Intelligent Technology Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-01-24
Anticipated expiration: 2029-06-29

Abstract

The utility model discloses a double-network-port embedded industrial control terminal supporting POE power supply, which comprises a core board, a power management circuit and a power interface; the core board is connected with two RJ45 ports, an output control interface and a digital input interface; the RJ45 port is connected with the core board after passing through a network transformer and an Ethernet PHY chip in sequence; the RJ45 port still loops through rectifier circuit, POE PD chip after, with power management circuit connects, power management circuit is used for exporting stable direct current, for the power supply of industrial control terminal. The utility model discloses two way power input of integration, its one of which is conventional direct current 24V input, and its two integrations POE power supply port, when the mill's networking is integrated, only need adopt POE switch to supply power can, both make things convenient for the power supply, also can guarantee at the equipment outage of mill, when overhauing, industrial control terminal does not shut down.

Description

Double-network-port embedded industrial control terminal supporting POE power supply

Technical Field

The utility model relates to a support embedded industry control terminal of two net gapes of POE power supply.

Background

Currently, when an industrial user networks a device that cannot be networked, the industrial user generally uses an industrial control terminal with a network to monitor the state of the device, obtain device data, or control the operation of the device. However, most of the existing industrial control terminals need to obtain power from the equipment to supply power to the industrial control terminals.

The existing industrial control terminal has the following defects: 1. the slave equipment is connected with a power supply and needs to be reconnected; 2. The power supply of the equipment is affected, so that the power supply of the equipment is unstable; 3. after the equipment is powered off, the terminal is also powered off, and the background loses the monitoring on the equipment state; 4. generally, the power is supplied by direct current, and if old equipment does not have a power supply meeting the specification used by the industrial control terminal, the power needs to be supplied by adopting a scheme of a power adapter. Thus, the power supply scheme becomes an uncertain factor when networking integration is performed on the equipment.

Secondly, the existing industrial control terminal generally has only one network port. Some devices themselves contain multiple modules of ethernet communications, whose network IP does not allow modification. Resulting in an inability to link to intranet. Secondly, although some devices are provided with ethernet ports, customers have other data to be collected, and a common method is to provide two network lines for the devices, wherein one network line is used for directly collecting the ethernet data of the devices, and the other network line is used for a collecting terminal. As such, both the cost and the system instability are increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a support embedded industry control terminal of two net gapes of POE power supply to solve above-mentioned prior art not enough.

In order to achieve the above object, the utility model adopts the following technical scheme: a dual-network-port embedded industrial control terminal supporting POE power supply comprises a core board, a power management circuit and a power interface; the core board is connected with two RJ45 ports, an output control interface and a digital input interface; the RJ45 port is connected with the core board after passing through a network transformer and an Ethernet PHY chip in sequence; the RJ45 port still loops through rectifier circuit, POE PD chip after, with power management circuit connects, power management circuit is used for exporting stable direct current, for the power supply of industrial control terminal.

Further, the core board is connected with an RS232 interface and an RS485 interface, and the RS232 interface is connected with the core board through an RS232 transceiver circuit; the RS485 interface is connected with the core board through an RS485 isolation receiving and transmitting circuit.

Further, the core board includes an imx287 processor using an ARM architecture, with a Linux 2.6.3+ QT4.7.3 operating system built in.

Further, the output control interface is a relay interface, the relay interface is connected with 4 paths of relays, and the core board drives the 4 paths of relays through a relay driving circuit.

Furthermore, the core board is connected with a PCIE-4G slot, and the PCIE-4G slot is used for being connected with a 4G module in an inserting mode.

The power management circuit comprises a power isolation circuit, the EVCC/EGND interface is directly connected with an external direct-current power supply through the power isolation circuit, and the EVCC/EGND interface is provided with 4 paths of high-level EVCC ports and 4 paths of low-level EGND ports.

Further, an NPN/PNP conversion circuit is arranged in the industrial control terminal, the NPN/PNP conversion circuit is connected to the power isolation circuit, and the high and low levels output by the power isolation circuit are used as reference voltages; the NPN/PNP conversion circuit is connected with the digital input interface and obtains a digital input signal of the digital input interface, and the digital input signal is subjected to NPN/PNP conversion and then is output to the core board through the optical coupling isolation input circuit.

Further, core plate is connected with CAN bus interface, CAN bus interface passes through CAN and keeps apart transceiver circuit and connects core plate.

Furthermore, the core board is connected with a USB HOST interface and supports the access of USB2.0 equipment below 16 GB; the core board is connected with a micro SD card slot and supports TF cards and MicroSD cards below 16 GB.

Further, an RTC clock circuit is connected to the core board, and the RTC clock circuit is connected to the core board through an I2C bus; the configuration pins of the core board are connected with a configuration switch and used for controlling whether the start mode, the program programming and the watchdog of the core board are started or not; the core board is connected with a buzzer and an indicator light.

The utility model discloses an useful part lies in: two paths of power supply inputs are integrated, one of the two paths of power supply inputs is a conventional direct current 24V input, and the other two paths of power supply inputs are integrated with a POE power supply port, so that when a factory is networked and integrated, only a POE switch is needed to supply power, power supply is convenient, and the industrial control terminal is not stopped when factory equipment is powered off and overhauled; meanwhile, the dual-network-port function is integrated, two network ports integrate different MAC addresses, the network can operate in different network segments, one network can be accessed to the Internet, and the other network communicates with the equipment, so that the problem that the IP of the equipment cannot be modified can be solved, and the requirement of a background on diversified data can be met.

Drawings

Fig. 1 is a schematic interface diagram of the present invention.

Fig. 2 is a functional frame diagram of the present invention.

Fig. 3 is a functional block diagram of the power management circuit of the present invention.

Fig. 4 is a schematic circuit diagram of the power management circuit of the present invention.

Fig. 5 is a schematic diagram of the circuit connection of the dual-channel RJ45 connector, the network transformer 16, and the ethernet PHY chip according to the present invention.

Fig. 6 is a schematic circuit diagram of a rectifier circuit according to the present invention.

Fig. 7 is a schematic circuit diagram of the network transformer of the present invention.

Fig. 8 is a schematic circuit diagram of an ethernet PHY chip according to the present invention.

Fig. 9 is a schematic circuit diagram of the reference voltage switching circuit, the NPN/PNP conversion circuit, and the power isolation circuit of the present invention.

Fig. 10 is a schematic circuit diagram of the core board of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, ~ and 10, the embedded industrial control terminal with double network ports and supporting power over POE comprises a core board 26, a power management circuit 15 and a power interface 1, wherein the power interface is connected with an external direct-current power supply and supplies power to the power management circuit, the power management circuit is used for performing voltage reduction and voltage stabilization processing on an externally input direct-current power supply and supplying power to power utilization units of the industrial control terminal, the core board is connected with an RTC clock circuit 24, a CAN bus interface 6, an RS232 interface 8, an RS485 interface 7, a first RJ45 port 2, a second RJ45 port 3, a PCIE-4G slot 23, an output control interface, a digital input interface 10 and an EVCC/EGND interface 11, the RTC clock circuit is connected with the core board through an I2C bus, the CAN bus interface 6 is connected with the core board through a CAN isolation transceiver circuit 18, the RS232 interface 8 is connected with the core board through an RS232 transceiver circuit 20, the RS485 interface 7 is connected with the core board through an RS485 isolation transceiver circuit 19, the ethernet isolation transceiver circuit 6 is used as a signal transmission circuit, the ethernet isolation transceiver 18 is connected with the core board, the ethernet interface of an ethernet bus system, the ethernet bus interface 13, the ethernet interface is used for processing system, the ethernet interface of an ethernet system, the ethernet interface 13, the ethernet system is used for processing system, the ethernet system is connected with the ethernet interface of an ethernet system, the ethernet interface 13, the ethernet system is suitable for processing system, the ethernet system is used for processing system, the ethernet system is suitable for processing system, the ethernet system is used for processing system, the ethernet system is suitable for processing system.

And an RS232 interface and an RS485 interface are simultaneously arranged, so that two paths of RS485 and RS232 Ethernet transmission circuits are realized.

The output control interface is relay interface 9, the relay interface has 4 ways, connects through relay drive circuit 21 nuclear core plate.

The power management circuit 15 includes a power isolation circuit 151, through which the EVCC/EGND interface 11 is directly connected to an external DC power supply DC-24V, and has 4 high EVCC ports and 4 low EGND ports.

An NPN/PNP conversion circuit 12 is arranged in the industrial control terminal, is connected with the power isolation circuit, takes the high and low levels output by the power isolation circuit 151 as reference voltage, and is also connected with a switch 28, and the switch is used for switching the input of the reference voltage so as to realize the switching of the NPN/PNP conversion mode.

The core board is connected with a USB HOST interface 5 which supports the access of USB2.0 equipment below 16 GB; the core board is connected with a Micro SD card slot 4 and supports TF cards and Micro SD cards below 16 GB.

The configuration pins of the core board are connected with a configuration switch 27 for controlling the starting mode, program programming and watchdog starting of the core board; the core board is connected with a buzzer 25 and an indicator light 30.

The industrial control terminal can support two power supply inputs:

the first method comprises the following steps: DC-24V. The external direct current power supply is connected to the power management circuit through the power interface, and the power management circuit comprises a power isolation circuit 151, a first voltage stabilizing circuit 152, a second voltage stabilizing circuit 153 and a third voltage stabilizing circuit 154, and outputs four direct current power supplies with different specifications:

1. the power isolation circuit 151 is directly connected with an external direct-current power supply, DC-24V is isolated in a 1:1 mode, the output is also 24V, but the power supply generates physical isolation, the 24V power supply output by the power isolation circuit supplies power for an EVCC/EGND interface, and simultaneously provides high and low levels as reference voltage for an NPN/PNP conversion circuit;

2. the first voltage stabilizing circuit 152 is directly connected with an external direct current power supply, and outputs the voltage of DC-24V after the voltage is reduced to 5V;

3. the second voltage stabilizing circuit 153 is connected to the first voltage stabilizing circuit 152, converts 5V into 3.3V and outputs the 3.3V, and supplies power to the electric elements with the rated voltage of 3.3V in the system;

4. the third voltage stabilizing circuit 154 is connected to the first voltage stabilizing circuit 152, converts 5V to 3.8V and outputs the converted V, so as to supply power to the PCIE-4G slot.

And the second method comprises the following steps: and (6) providing a POE power supply. The industrial control terminal comprises a dual-channel RJ45 connector 29, wherein the dual-channel RJ45 connector is provided with 2 RJ45 ports Eth0 and Eth1, a POE-powered RJ45 network cable is connected to Eth0 and Eth1, POE is output through 4 pins and 5 pins of the dual-channel RJ45 connector, and POE is output through 7 pins and 8 pins of the dual-channel RJ45 connector. The rectifying circuit 13 comprises a first rectifying bridge stack 131, a second rectifying bridge stack 132, a POE-PD detection circuit 133 and an isolation transformer circuit 134; POE + and POE-pass through a first rectifier bridge stack 131 to generate POE-48V and POE-GND; meanwhile,

pins

1 and 2,

pins

3 and 6 of the dual-channel RJ45 connector are connected to the network transformer 16, the network transformer 16 outputs POE-AC1 and POE-AC2 signals, and the POE-48V and POE-GND signals are output through the second rectifier bridge stack 132; the outputs of the first rectifier bridge stack 131 and the second rectifier bridge stack 132 are both connected to the POE-PD detection circuit 133; when the POE switch is connected to RJ45 port Eth0, behind Eth1 through the RJ45 net twine, the POE switch will detect whether this POE-PD detection circuitry is for the circuit that receives that accords with IEE802.3AF, if accord with, the POE switch will supply power to this POE-PD detection circuitry, POE-PD detection circuitry output POE-48V, and through keeping apart vary voltage circuit 134, convert 48V into DC-24V, then be connected to power management circuit, so just realized outside direct current supply and POE power supply.

When power is not supplied by POE,

pins

1, 2 and

pins

3, 6 of the dual-channel RJ45 connector are connected to the Ethernet PHY chip 17 through the network transformer 16, and

pins

9, 10 and

pins

11, 14 of the dual-channel RJ45 connector are connected to the Ethernet PHY chip 17 after passing through the network transformer 16, and then are connected to the core board through the RMII interface.

The RS232 interface 8 has two paths: DTX and DRX are debugging ports, and TX and RX are general RS32 transceiving interfaces. The RS232 interface is connected to the core board through an RS232 transceiver circuit.

The EVCC/EGND interface 11 is directly connected to an external dc power supply through a power isolation circuit 151, and has 4 high EVCC ports and 4 low EGND ports.

The digital input interface 10 has 8 paths, and is connected to the core board 26 through an NPN/PNP conversion circuit 12 and an optical coupling isolation input circuit 22 in sequence, the NPN/PNP conversion circuit is connected to the power isolation circuit 151 through a reference voltage switching circuit 121, a high-low level output by the power isolation circuit is used as a reference voltage, the reference voltage switching circuit 121 is used for switching the high-low level output by the power isolation circuit to be used as a reference voltage input, so as to realize switching of an NPN/PNP conversion mode, and the reference voltage switching circuit 121 includes a switch 28.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. The utility model provides a support embedded industrial control terminal of two net gapes of POE power supply which characterized in that: the core board is connected with the power management circuit; the core board is connected with two RJ45 ports, an output control interface and a digital input interface; the RJ45 port is connected with the core board after passing through a network transformer and an Ethernet PHY chip in sequence; the RJ45 port still loops through rectifier circuit, POE PD chip after, with power management circuit connects, power management circuit is used for exporting stable direct current, for the power supply of industrial control terminal.

2. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the core board is connected with an RS232 interface and an RS485 interface, and the RS232 interface is connected with the core board through an RS232 transceiver circuit; the RS485 interface is connected with the core board through an RS485 isolation receiving and transmitting circuit.

3. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the core board includes an imx287 processor using an ARM architecture, with a Linux 2.6.3+ QT4.7.3 operating system embedded.

4. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the output control interface is a relay interface, 4 paths of relays are connected to the relay interface, and the core board drives the 4 paths of relays through the relay driving circuit.

5. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the core board is connected with a PCIE-4G slot, and the PCIE-4G slot is used for being connected with a 4G module in an inserting mode.

6. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the power management circuit comprises a power isolation circuit, the EVCC/EGND interface is directly connected with an external direct-current power supply through the power isolation circuit, and the EVCC/EGND interface is provided with 4 paths of high-level EVCC ports and 4 paths of low-level EGND ports.

7. The POE-powered dual-port embedded industrial control terminal of claim 6, wherein: an NPN/PNP conversion circuit is arranged in the industrial control terminal, is connected with the power isolation circuit and takes the high and low levels output by the power isolation circuit as reference voltage, and is also connected with a change-over switch which is used for changing over the input of the reference voltage so as to realize the switching of NPN/PNP conversion modes; the NPN/PNP conversion circuit is connected with the digital input interface and obtains a digital input signal of the digital input interface, and the digital input signal is subjected to NPN/PNP conversion and then is output to the core board through the optical coupling isolation input circuit.

8. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the core board is connected with a CAN bus interface, and the CAN bus interface is connected with the core board through a CAN isolation transceiver circuit.

9. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the core board is connected with a USB HOST interface and supports USB2.0 equipment access below 16 GB; the core board is connected with a microSD card slot and supports TF cards and MicroSD cards below 16 GB.

10. The POE-powered dual-port embedded industrial control terminal according to claim 1, wherein: the core board is connected with an RTC clock circuit, and the RTC clock circuit is connected with the core board through an I2C bus; the configuration pins of the core board are connected with a configuration switch and used for controlling whether the start mode, the program programming and the watchdog of the core board are started or not; the core board is connected with a buzzer and an indicator light.