CN101272514A

CN101272514A - Hot-plug redundant communication device in railway communication

Info

Publication number: CN101272514A
Application number: CNA200810106200XA
Authority: CN
Inventors: 崔迎炜; 叶青林
Original assignee: BEIJING FOUNTAIN MICROSYSTEMS Co Ltd
Current assignee: Beijing Fangtian long Polytron Technologies Inc
Priority date: 2008-05-09
Filing date: 2008-05-09
Publication date: 2008-09-24
Anticipated expiration: 2028-05-09
Also published as: CN101272514B

Abstract

The invention discloses a hot swappable redundant communication device applied to railway communication, consisting of two power modules which are connected with a power bus. The two railway communication system modules are connected with power bus respectively through top-and-bottom electricity and reset controlling circuit. Two controllers are connected with each other respectively through a net mouth and a serial interface and are respectively and separately connected with the railway communication system module through a GSM-R controlling serial interface; the controller and an I/O interface extension groove are also respectively connected with a peripheral equipment interconnection bus; the I/O interface is also connected with the power bus. The hot swappable redundant communication device has the advantages of the adoption of a compact 3U CompactPCI structure, integration, hot swappable performance and redundant design and realizes the aims of high reliability and miniaturization. All modules of the device can be replaced online without power-off. Furthermore, the redundant design is adopted in crucial modules, such as a GSM-R module in the device, a controller module, a power module, etc. When any function module goes wrong, the function can be automatically switched to a normal module to continue the work, thus guaranteeing the high reliability of an engine communication and ensuring the operation safety of the engine.

Description

Hot-plug redundant communicator in the railway communication

Technical field

The present invention relates to a kind of railway communication device.Particularly relate to a kind of employing hot plug design, install all modules and all can carry out the online replacing of not power down, guarantee the hot-plug redundant communicator in the railway communication of locomotive operation fail safe.

Background technology

GSM-R (GSM for Railway) system Chinese full name is a Railroad Communication System, be a kind of based on ripe, the most general GSM of the common wireless communication system platform in the present world, special in satisfying the digital wireless communication system that railway applications is developed, at characteristics such as railway communication train scheduling, Train Control, support bullet trains, provide a kind of integration radio communication system of economical and efficient of the additional function of customization for railway operation.

The GSM-R system is become by six groups of subsystems: switching subsystem (SSS), base station sub-system (BSS), operation and maintenance subsystem (OMC), GPRS subsystem (GPRS), terminal subsystem and intelligent movable net system (IN), and realize and the interconnecting of the circuit domain business of other communication networks by the GMSC (gateway mobile switching center) (GMSC) in the switching subsystem (SSS), realize and the interconnecting of the packet switch domain service of other data information networks by the gateway GPRS service support node (GGSN) in the General Packet Radio Service System (GPRS).

But, have only cover GSM-R and a control circuit and a power supply in the existing Railroad Communication System whole system, in case wherein any one goes wrong, just will cause the paralysis of whole system, can not guarantee the high reliability of communication of locomotive.

Summary of the invention

Technical problem to be solved by this invention is, a kind of employing hot plug design is provided, and installs all modules and all can carry out the online replacing of not power down, guarantees the hot-plug redundant communicator in the railway communication of locomotive operation fail safe.

The technical solution adopted in the present invention is: the hot-plug redundant communicator in a kind of railway communication, include redundant Railroad Communication System unit, redundant manipulator unit, redundant power unit and I/O interface expansion slot, described redundant Railroad Communication System unit is to be made of two Railroad Communication System modules; Described redundant manipulator unit is to be made of two controllers; Described redundant power unit is to be made of two power modules; Wherein, two power modules all connect power bus, and two Railroad Communication System modules connect power bus by power-on and power-off and reset control circuit separately; Two controllers interconnect by network interface and serial ports respectively, also link to each other with the Railroad Communication System module by GSM-R control serial ports respectively separately; Controller also is connected the ancillary equipment interconnection respectively with I/O interface expansion slot; Described I/O interface expansion slot also connects power bus.

Described redundant Railroad Communication System unit, redundant manipulator unit, redundant power unit and I/O interface expansion slot all adopt the hot plug structure to be arranged on the redundant active backboard of 3U.

Described two controllers are to be made of identical circuit structure, and each controller includes: control chip U5; Memory chip U6-U10, flash memory U12, firmware chip U14 and the programming device U15 that is connected with data bus interface and the address bus interface of control chip U5 by address bus and data/address bus respectively; The ancillary equipment interconnection bridge sheet U2 that links to each other with the ancillary equipment interconnection of control chip U5; The compact periphery devices interconnect Bussing connector J2 that is connected with the ancillary equipment interconnection of control chip U5 by network controller chip U17; Described ancillary equipment interconnection bridge sheet U2 also links to each other with compact periphery devices interconnect Bussing connector J1; Described programming device U7 also links to each other with compact periphery devices interconnect Bussing connector J2 respectively, and links to each other with the test port JTAG of ancillary equipment interconnection bridge sheet U2.

The ancillary equipment interconnection of described controller is the disengaging that realizes ancillary equipment interconnection bridge sheet U2 and ancillary equipment interconnection by the test port JTAG of controller control peripheral devices interconnection bridge sheet U2, and its control procedure comprises the steps:

1) make the test port controller break away from reset mode;

2) make the test port controller enter the SHIFT_IR state;

3) under the SHIFT_IR state, make the test port controller enter the EXIT1_IR state;

4) enter the EXIT1_IR state after, make the test port controller enter the Update-IR state;

5) enter the Update-IR state after, make the test port controller enter the Run-Test/Idle state again, at this moment, bridge sheet U2 enters isolation.

Described two power-on and power-off and reset control circuit also are two identical circuit, each power-on and power-off and reset control circuit include hot plug control chip U1, wherein, hot plug control chip U1's: the B14 pin of the 5V power supply control output end J2 connector of the Railroad Communication System module in pin 2 and the controller links to each other, and the C14 pin of the 12V power supply control output end J2 connector of the Railroad Communication System module in pin 4 and the controller links to each other; Pin 3 connects the 5V power supply by resistance R 4; Pin 5 connects the 5V power supply by resistance R 3; Pin 8 ground connection; Pin 15 connects the 5V power supply by resistance R 1 with pin 1; Pin 15 also links to each other with the drain D of field effect transistor Q1; Pin 13 links to each other with the grid G of field effect transistor Q1 by resistance R 2, and the source S of field effect transistor Q1 is that the 5V power output end links to each other with the power input of Railroad Communication System module; Pin 14 connects the 12V power supply by resistance R 6 with pin 16; Pin 14 also connects the drain D of field effect transistor Q2; Pin 12 also connects the grid G of field effect transistor Q2 by resistance R 5; The source S of field effect transistor Q2 is that the 12V power output end links to each other with the power input of Railroad Communication System module.

Described two power modules are that two identical power circuits constitute, and each power circuit includes: the circuit that is produced the 12V power supply by the 110V direct current; Produce the circuit of 5V power supply by the 12V direct current; And the circuit that produces the 3.3V power supply by the 12V direct current.

Described circuit by 110V direct current generation 12V power supply includes: input connects the filter EMI of 110V DC power supply; Capacitor C 1, the 12V in parallel successively with the output of filter EMI produce circuit module DC-DC, and capacitor C 2; Wherein, output at filter EMI also is connected with fuse b, also be connected with diode D1 between capacitor C 1 and the anodal line of 12V generation circuit module DC-DC, the output of capacitor C 2 constitutes the output of 12V power supply, and the output of the positive pole of capacitor C 2 also is connected with diode D2.

Described circuit by 12V direct current generation 5V power supply includes: parallel connection and input connect capacitor C 3, the 5V generation circuit module DC-DC of 12V power supply successively, and capacitor C 4, the output of its capacitor C 4 constitutes the output of 5V power supply, and the output of the positive pole of capacitor C 4 also is connected with diode D3.

Described circuit by 12V direct current generation 3.3V power supply includes: parallel connection and input connect capacitor C 5, the 3.3V generation circuit module DC-DC of 12V power supply successively, and capacitor C 6, the output of its capacitor C 6 constitutes the output of 3.3V power supply, and the output of the positive pole of capacitor C 6 also is connected with diode D4.

Hot-plug redundant communicator in the railway communication of the present invention is directed to the specific (special) requirements such as highly reliable, wide temperature of railway, adopts the 3U CompactPCI structure of compact, integrated, hot plug, Redundancy Design, has reached target highly reliable, miniaturization.The big bandwidth that not only has commercial pci bus has more characteristics such as durable, the antidetonation that satisfies industrial needs, hot plug.Install all modules and all can carry out the online replacing of not power down, promptly, key modules such as GSM-R module, controller module, power module all adopt Redundancy Design in the device, any one functional module fault, this function all will automatically switch to normal module and work on, and guarantee the high reliability of communication of locomotive and ensure the locomotive operation fail safe.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present invention;

Fig. 2 is the formation block diagram of controller of the present invention;

Fig. 3 is power-on and power-off of the present invention and reset control circuit schematic diagram;

Fig. 4 is the circuit theory diagrams of power module of the present invention, among the figure:

4a is the circuit that is produced the 12V power supply by the 110V direct current, and 4b is the circuit that is produced the 5V power supply by the 12V direct current,

4c is the circuit that is produced the 3.3V power supply by the 12V direct current;

Fig. 5 is a CPCI J1 connector part circuit;

Fig. 6 is a CPCI J2 connector part circuit;

Fig. 7 is a PCI bridge sheet partial circuit;

Fig. 8 is the clock portion parallel circuit;

Fig. 9 is a CPU configuration section circuit;

Figure 10 is a CPU Memory Controller Hub partial circuit;

Figure 11 and Figure 12 are the internal memory partial circuits;

Figure 13 is an address bus drive part circuit;

Figure 14 is flash memory and firmware circuitry;

Figure 15 is the programming device circuit;

Figure 16 is a CPU PCI partial circuit;

Figure 17 is the network controller partial circuit;

Figure 18 is the part that resets.

Wherein:

1,2: Railroad Communication System module 3,4: controller

5,6: power module 7: power bus

8: ancillary equipment interconnection 9: network interface

10: serial ports 11,12:GSM-R serial ports

13,14: power-on and power-off and reset control circuit 15: address bus

16: data/address bus 31,41: total line traffic control

A: redundant Railroad Communication System unit B: redundant manipulator unit

C: redundant power cells D: I/O interface expansion slot

The redundant active backboard of E:3U

Embodiment

Below in conjunction with drawings and Examples the hot-plug redundant communicator in the railway communication of the present invention is made a detailed description.

As shown in Figure 1, hot-plug redundant communicator in the railway communication of the present invention, include redundant Railroad Communication System unit A, redundant manipulator unit B, redundant power unit C and I/O interface expansion slot D, described redundant Railroad Communication System unit A is made of two Railroad

Communication System modules

1,2; Described redundant manipulator unit B is to be made of two

controllers

3,4; Described redundant power unit C is made of two

power modules

5,6; Wherein, two

power modules

5,6 all connect 7, two Railroad Communication System modules of

power bus

1,2 and connect power bus 7 by power-on and power-off and

reset control circuit

13,14 separately; Two

controllers

3,4 interconnect by network interface 9 and serial ports 10 respectively, also link to each other with Railroad

Communication System module

1,2 by GSM-R

serial ports

11,12 respectively separately;

Controller

3,4 also is connected ancillary equipment interconnection 8 respectively with I/O interface expansion slot D; Described I/O interface expansion slot D also connects power bus 7.

Described redundant Railroad Communication System unit A, redundant manipulator unit B, redundant power unit C and I/O interface expansion slot D all adopt the hot plug structure to be arranged on the redundant active backboard E of 3U.

Whole device power supply of the present invention has two power modules to compose in parallel the redundant power supply pattern, and under the situation that arbitrary power supply breaks down, another power module can be powered by holdout device, for whole device provides motivational guarantee.

The Core Feature of communicator is to utilize the GSM-R network to carry out data communication and transmission, only needs a controller and a GSM-R module to get final product on the principle, communicates by the GSM-R serial ports between controller and the GSM-R module.In order to improve the reliability of communication, GSM-R module and controller module have all adopted two remaining redundancies.

When the hot-plug redundant communicator in the railway communication of the present invention was worked, two one of controllers were in holotype (becoming master controller), and one is in pattern (becoming preparation controller) fully.Main controller controls core bus and is controlled all devices of whole device by backboard, comprises the equipment of two GSM-R modules and I/O expansion slot; Preparation controller temporarily breaks away from core bus and is in listen mode, and preparation controller utilizes heartbeat agreement (heartbeat) and check point agreement (checkpoint) to carry out synchronously with master controller by a serial ports and a network interface.When being equipped with control and utilizing the work of heartbeat protocol discovery master controller undesired, preparation controller positive return or close master controller oneself upgrades to master controller and control bus then, thereby obtains the control of whole device all devices.

Above-mentioned heartbeat agreement: the heartbeat protocol definition method of monitoring equipment activity.Equipment is sent the own movable signal of expression with Fixed Time Interval, illustrates that if this signal exists this equipment sentences active state, and this signal does not exist and illustrates that then this equipment crashes.Be similar to beating of heart, therefore be called the heartbeat agreement.

Above-mentioned check point agreement: the check point protocol definition two equipment room states methods of backup mutually.Device A is given equipment B with Fixed Time Interval by data link with the status data of oneself and is backuped.In case device A breaks down, equipment B can be returned to state before the device A fault fast by this Backup Data.

Two same one of GSM-R are in holotype, and one is in pattern fully, and the two is controlled by serial ports by master controller, but is only undertaken by main GSM-R module with communicating by letter of outside GSM-R network.When master controller finds that by serial ports main GSM-R module breaks down, master controller is by power-on and power-off unique on the backboard and reset control circuit resets to main GSM-R module or electricity operation down, to be equipped with the GSM-R controller then and upgrade to main GSM-R controller, thereby maintain communication link with the GSM-R network.

As shown in Figure 2, described two controllers the 3, the 4th are made of identical circuit structure, and each controller includes: control chip U5; Memory chip (SDRAM) U6-U10 (as Figure 11, shown in Figure 12), flash memory (FLASH) U12 (as shown in figure 14), firmware chip (BOOTROM) U14 (as shown in figure 14) and the programming device U15 (as shown in figure 15) that is connected with data bus interface (DATA) and the address bus interface (ADDR) of control chip U5 by address bus 15 and data/address bus 16 respectively; Ancillary equipment interconnection (PCI-PCI) the bridge sheet U2 that links to each other with the ancillary equipment of control chip U5 interconnected (PCI) bus port; Compact periphery devices interconnect bus (CPCI) the connector J2 that is connected by network controller chip U17 with ancillary equipment interconnection protocol (PCI) port of control chip U5, as shown in Figure 6; Described ancillary equipment interconnection bridge sheet U2 also links to each other with compact periphery devices interconnect Bussing connector J1, as shown in Figure 5; Described programming device U15 also links to each other with compact periphery devices interconnect Bussing connector J2 respectively, and links to each other with the test port JTAG of ancillary equipment interconnection bridge sheet U2.

The control chip U5 model that is adopted in the controller circuitry of present embodiment: MPC8245 is as Fig. 9, Figure 10, shown in Figure 16.

PCI-PCI bridge sheet U2 model: PCI2050, as shown in Figure 7; Network controller chip U17 model: 82559ER as shown in figure 17.

All functional modules all have controller to realize control and management in the hot-plug redundant communicator in the railway communication of the present invention, reliable in order to realize, high available, controller adopts two remaining Redundancy Design, and promptly two controllers all can be controlled cpci bus and all functions module fully.But cpci bus is single master (HOST) bus, surpasses a HOST and exists if having on the cpci bus, conflict then can occur and cause the cpci bus can't operate as normal.

As shown in Figure 2, the cpci bus of two controllers is interconnected at together, forms redundant manipulator, as long as any time has only a controller control cpci bus, two controllers just can not produce conflict.When a controller broke down therein, the another one controller can be kept apart the controller that breaks down timely from cpci bus, had so just realized the highly reliable work of controller.

The JTAG mouth is made up of 5 control signals, and is as shown in the table:

Signal name	Sense	Signal description
Signal name	Sense	Signal description	TCK	Input	The JTAG scan clock

TMS	Input	The jtag test model selection
TMS	Input	The jtag test model selection	TDI	Input	JTAG scanning input data
TDO	Output	JTAG scans dateout	TDI	Input	JTAG scanning input data
TDO	Output	JTAG scans dateout	TRST	Input	The jtag test logic reset

The ancillary equipment interconnection 8 of described controller is the disengaging that realizes ancillary equipment interconnection bridge sheet U2 and ancillary equipment interconnection 8 by the test port (JTAG) of

controller

3,4 control peripheral devices interconnection bridge sheet U2, and its control procedure comprises the steps:

1) make the test port controller break away from reset mode;

2) make the test port controller enter the SHIFT_IR state;

5) enter the Update-IR state after, make the test port controller enter the Run-Test/Idle state again, at this moment, PCI-PCI bridge sheet U2 enters isolation.Relevant English has definition in IEEE Std1149.1-1990 standard.

As shown in Figure 3, described two power-on and power-off and reset control circuit 13,14 also are two identical circuit, each power-on and power-off and reset control circuit include hot plug control chip U1, wherein, hot plug control chip U1's: the B14 pin of the 5V power supply control output end J2 connector of the Railroad Communication System module in pin 2 and the controller links to each other, and the C14 pin of the 12V power supply control output end J2 connector of the Railroad Communication System module in pin 4 and the controller links to each other; Pin 3 connects 5V power supply on the backboard by resistance R 4; Pin 5 connects 5V power supply on the backboard by resistance R 3; Pin 8 ground connection; Pin 15 connects 5V power supply on the backboard by resistance R 1 with pin 1; Pin 15 also links to each other with the drain D of field effect transistor Q1; Pin 13 links to each other with the grid G of field effect transistor Q1 by resistance R 2, and the source S of field effect transistor Q1 is that the 5V power output end links to each other with the power input of Railroad Communication System module 1,2; Pin 14 connects 12V power supply on the backboard by resistance R 6 with pin 16; Pin 14 also connects the drain D of field effect transistor Q2; Pin 12 also connects the grid G of field effect transistor Q2 by resistance R 5; The source S of field effect transistor Q2 is that the 12V power output end links to each other with the power input of Railroad Communication System module 1,2.

GSM-R is the core communication module of device, and the reliably working of this module is the motivational guarantee of whole device reliably working.

The supply power voltage of GSM-R module is 12V and 5V, and control interface is RS232.The GSM-R module is the very high digital-to-analogue mixing module of complexity; strict requirement is arranged when powering on initialization; and when switching, module require interface thoroughly to isolate; therefore the power supply circuits of GSM-R need particular design; controller be the more important thing is and can be controlled the independent power-on and power-off of GSM-R module outside not only needing to reset by backboard control.

5V_IN and 12V_IN are the power supply of power module by backboard among Fig. 3, and 5V_GSMR and 12V_GSMR are the power supply of GSM-R module.GSMR_5V_ON is the control signal of GSM-R module 5V power supply, and GSMR_12V_ON is the control signal of GSM-R module 12V power supply, and these two control signals are produced by the controller module of device, and high level is effective.

When one of them GSM-R module broke down, controller can be realized electricity fully down to malfunctioning module by foregoing circuit, thereby communication link is switched on the another one GSM-R module.

As shown in Figure 4, described two

power modules

5,6 are that two identical power circuits constitute, and each power circuit includes: the circuit that is produced the 12V power supply by the 110V direct current; Produce the circuit of 5V power supply by the 12V direct current; And the circuit that produces the 3.3V power supply by the 12V direct current.

The outside input of hot-plug redundant communicator in the railway communication of the present invention power supply is the 110V direct current, and the 110V direct current can not directly be used by each module of device.12V, 5V and 3.3V voltage that each module is required are produced by power module.The input of 110V direct current adopts electromagnetic interface filter to reduce interference; Whole power module adopts the 500W fuse as basic protection mechanism; In order to guarantee the redundancy feature of power module, all be connected in series Schottky diode in the every road of power module voltage output stage and prevent that electric current is counter and irritate.

Shown in Fig. 4 a, described circuit by 110V direct current generation 12V power supply includes: input connects the filter EMI of 110V DC power supply; Capacitor C 1, the 12V in parallel successively with the output of filter EMI produce circuit module DC-DC, and capacitor C 2; Wherein, output at filter EMI also is connected with fuse b, also be connected with diode D1 between capacitor C 1 and the anodal line of 12V generation circuit module DC-DC, the output of capacitor C 2 constitutes the output of 12V power supply, and the output of the positive pole of capacitor C 2 also is connected with diode D2.

Shown in Fig. 4 b, described circuit by 12V direct current generation 5V power supply includes: parallel connection and input connect capacitor C 3, the 5V generation circuit module DC-DC of 12V power supply successively, and capacitor C 4, the output of its capacitor C 4 constitutes the output of 5V power supply, and the output of the positive pole of capacitor C 4 also is connected with diode D3.

Shown in Fig. 4 c, described circuit by 12V direct current generation 3.3V power supply includes: parallel connection and input connect capacitor C 5, the 3.3V generation circuit module DC-DC of 12V power supply successively, and capacitor C 6, the output of its capacitor C 6 constitutes the output of 3.3V power supply, and the output of the positive pole of capacitor C 6 also is connected with diode D4.

In the power module of present embodiment, adopted:

Electromagnetic interface filter model: TFCC-3ADT;

12V produces circuit module DC-DC model: DBS150A12

5V produces circuit DC-DC module model: LSN-5/10-D12

3.3V produce circuit DC-DC module model: LSN-3.3/10-D12.

Claims

1. the hot-plug redundant communicator in the railway communication, include redundant Railroad Communication System unit (A), redundant manipulator unit (B), redundant power unit (C) and I/O interface expansion slot (D), it is characterized in that described redundant Railroad Communication System unit (A) is to be made of two Railroad Communication System modules (1,2); Described redundant manipulator unit (B) is to be made of two controllers (3,4); Described redundant power unit (C) is to be made of two power modules (5,6); Wherein, two power modules (5,6) all connect power bus (7), and two Railroad Communication System modules (1,2) connect power bus (7) by power-on and power-off and reset control circuit (13,14) separately; Two controllers (3,4) interconnect by network interface (9) and serial ports (10) respectively, also link to each other with Railroad Communication System module (1,2) by GSM-R control serial ports (11,12) respectively separately; Controller (3,4) also is connected ancillary equipment interconnection (8) respectively with I/O interface expansion slot (D); Described I/O interface expansion slot (D) also connects power bus (7).

2. the hot-plug redundant communicator in the railway communication according to claim 1, it is characterized in that described redundant Railroad Communication System unit (A), redundant manipulator unit (B), redundant power unit (C) and I/O interface expansion slot (D) all adopt the hot plug structure to be arranged on the redundant active backboard of 3U (E).

3. the hot-plug redundant communicator in the railway communication according to claim 1 is characterized in that, described two controllers (3,4) are to be made of identical circuit structure, and each controller includes: control chip U5; Memory chip U6-U10, flash memory U12, firmware chip U14 and the programming device U15 that is connected with data bus interface and the address bus interface of control chip U5 by address bus (15) and data/address bus (16) respectively; The ancillary equipment interconnection bridge sheet U2 that links to each other with the ancillary equipment interconnection of control chip U5; The compact periphery devices interconnect Bussing connector J2 that is connected with the ancillary equipment interconnection of control chip U5 by network controller chip U17; Described ancillary equipment interconnection bridge sheet U2 also links to each other with compact periphery devices interconnect Bussing connector J1; Described programming device U7 also links to each other with compact periphery devices interconnect Bussing connector J2 respectively, and links to each other with the test port JTAG of ancillary equipment interconnection bridge sheet U2.

4. the hot-plug redundant communicator in the railway communication according to claim 3, it is characterized in that, the ancillary equipment interconnection (8) of described controller is the disengaging that realizes ancillary equipment interconnection bridge sheet U2 and ancillary equipment interconnection (8) by the test port JTAG of controller (3,4) control peripheral devices interconnection bridge sheet U2, and its control procedure comprises the steps:

1) make the test port controller break away from reset mode;

2) make the test port controller enter the SHIFT_IR state;

5. the hot-plug redundant communicator in the railway communication according to claim 1, it is characterized in that, described two power-on and power-off and reset control circuit (13,14) also are two identical circuit, each power-on and power-off and reset control circuit include hot plug control chip U1, wherein, hot plug control chip U1's: the B14 pin of the 5V power supply control output end J2 connector of the Railroad Communication System module in pin 2 and the controller links to each other, and the C14 pin of the 12V power supply control output end J2 connector of the Railroad Communication System module in pin 4 and the controller links to each other; Pin 3 connects the 5V power supply by resistance R 4; Pin 5 connects the 5V power supply by resistance R 3; Pin 8 ground connection; Pin 15 connects the 5V power supply by resistance R 1 with pin 1; Pin 15 also links to each other with the drain D of field effect transistor Q1; Pin 13 links to each other with the grid G of field effect transistor Q1 by resistance R 2, and the source S of field effect transistor Q1 is that the 5V power output end links to each other with the power input of Railroad Communication System module (1,2); Pin 14 connects the 12V power supply by resistance R 6 with pin 16; Pin 14 also connects the drain D of field effect transistor Q2; Pin 12 also connects the grid G of field effect transistor Q2 by resistance R 5; The source S of field effect transistor Q2 is that the 12V power output end links to each other with the power input of Railroad Communication System module (1,2).

6. the hot-plug redundant communicator in the railway communication according to claim 1, it is characterized in that, described two power modules (5,6) are that two identical power circuits constitute, and each power circuit includes: the circuit that is produced the 12V power supply by the 110V direct current; Produce the circuit of 5V power supply by the 12V direct current; And the circuit that produces the 3.3V power supply by the 12V direct current.

7. the hot-plug redundant communicator in the railway communication according to claim 6 is characterized in that, described circuit by 110V direct current generation 12V power supply includes: input connects the filter EMI of 110V DC power supply; Capacitor C 1, the 12V in parallel successively with the output of filter EMI produce circuit module DC-DC, and capacitor C 2; Wherein, output at filter EMI also is connected with fuse b, also be connected with diode D1 between capacitor C 1 and the anodal line of 12V generation circuit module DC-DC, the output of capacitor C 2 constitutes the output of 12V power supply, and the output of the positive pole of capacitor C 2 also is connected with diode D2.

8. the hot-plug redundant communicator in the railway communication according to claim 6, it is characterized in that, described circuit by 12V direct current generation 5V power supply includes: parallel connection and input connect capacitor C 3, the 5V generation circuit module DC-DC of 12V power supply successively, and capacitor C 4, the output of its capacitor C 4 constitutes the output of 5V power supply, and the output of the positive pole of capacitor C 4 also is connected with diode D3.

9. the hot-plug redundant communicator in the railway communication according to claim 6, it is characterized in that, described circuit by 12V direct current generation 3.3V power supply includes: parallel connection and input connect capacitor C 5, the 3.3V generation circuit module DC-DC of 12V power supply successively, and capacitor C 6, the output of its capacitor C 6 constitutes the output of 3.3V power supply, and the output of the positive pole of capacitor C 6 also is connected with diode D4.