This standard specifies the electrical characteristics, mechanical characteristics and signal transmission and control requirements of the interface between the alarm device installed on a passenger car (no more than 8 seats excluding the driver's seat) and the on-board wireless communication terminal device in the vehicle anti-robbery and anti-theft network alarm system. This standard applies to the production, inspection and trade of on-board anti-robbery and anti-theft network alarm devices that transmit vehicle alarm signals and control signals via wireless public networks. GA/T 440-2003 Interface between on-board anti-theft alarm devices and on-board wireless communication terminal devices in vehicle anti-robbery and anti-theft network alarm systems GA/T440-2003 Standard download decompression password: www.bzxz.net

This standard is proposed and managed by the National Security Alarm System Standardization Technical Committee (SAC/TC100). GA/T440—2003
The drafting units of this standard are: Beijing Security Technology Prevention Management Office, Shenyang Weitong Electronic Information Industry Co., Ltd. SAC/TC100 Secretariat.
The main drafters of this standard are: Wei Tianjun, Shi Zhenguo, Xu Xiaobo, Ji Yuan, Di Jiuhe, Liu Xiqing, Tian Jing. 1 Scope
In the vehicle anti-robbery and anti-theft network alarm system
GA/T440—20D3
The interface between the vehicle anti-theft alarm device and the vehicle wireless communication terminal device This standard specifies the electrical characteristics, mechanical characteristics and signal transmission and control requirements of the interface between the alarm device installed on a passenger car (no more than 8 seats except the driver's seat) and the vehicle wireless communication terminal device in the vehicle anti-robbery and anti-theft network alarm system. This standard applies to the production, inspection and trade of vehicle-mounted anti-robbery and anti-theft networked alarm equipment that transmits vehicle alarm signals and control signals through wireless public networks.
2 Normative referenced documents
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, its latest version applies to this standard. GB/T3454-1982 Interface circuit definition table between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) (idtCCITT V.28)
GB/T6107-12000 Interface between data terminal equipment and data circuit-terminating equipment using serial binary data exchange (idt EIA/TIA-232-E)
GB/T12057-1989 Universal 37-pin and 9-pin interface between data terminal equipment and data circuit terminating equipment using serial binary data exchange (eqvEIARS449--1977) GB12663--2001 General technical conditions for anti-theft alarm controllers GA2-1999 Vehicle anti-theft alarm system passenger car (eqvIEC839-10-1:1995) GA3 66—2001 Specification for the installation of vehicle anti-theft alarm equipment EIA/TIA-S74 9-pin asynchronous interface between data terminal equipment and data circuit terminating equipment using serial binary data exchange
3 Terms and definitions
GA2—1999, GB/T6107--2000 and GB12663—2001 and the following terms and definitions apply to this standard. 3.1
Vehicle security alarm equipment (VSAE) is a device installed on a passenger car with a passenger, which has the function of a vehicle anti-theft system and can be connected to the vehicle wireless communication terminal equipment through an interface, and can output vehicle alarm signals and status information through the interface and receive remote control commands. Note: This definition is different from the "host" of VSAE defined in 3.2 of GA2-1999. Both meet the requirements of the "host" in GA2-1999, but the latter does not have the "interface" and its corresponding functions specified in this standard. 3.2
Radio communication terminating equipment (RCTE) is a device installed on a passenger car with wireless transceiver function and capable of transmitting the specified information between VSAE and monitoring center. 3.3
Vehicle security alarm network equipment (VSANE) is a vehicle terminal device installed on a passenger car with integrated functions of vehicle anti-robbery and anti-theft network alarm. The equipment can be composed of 1
GA/T 440--2003
VSAE and RCTE interconnected through the interface specified in this standard, or it can be an integrated device of VSAE and RCTE. 3.4
Monitoring center monitoring center
It can receive and process the alarm signal and status information sent by VSANE, monitor and control the running status of the vehicle, and is manned to receive and handle the alarm.
Vehicle security alarm network system (VSANS) is an information network system composed of VSANE installed on a passenger car, a communication network and a monitoring center. While providing security protection and local alarm functions for the vehicle, VSANE transmits alarm information to the monitoring center through the wireless communication system and the wired communication network for processing, and the monitoring center issues instructions to the vehicle through the communication network to implement remote monitoring of the vehicle. The system block diagram is shown in Figure 1. Network alarm system (VSANS)
! Vehicle anti-robbery and anti-theft network alarm equipment VSANEVSAE
）Sensor or detector
Communication network
Monitoring centermonitoring center
Figure 1 Block diagram of vehicle anti-robbery and anti-theft network alarm system (VSANS) 3.6
Interface
The interface for information communication between the vehicle alarm equipment (VSAE) and the vehicle wireless communication terminal equipment (RCTE). 3.7
Hijack alarm
An alarm signal generated by the VSAE's intentional anti-hijacking device when a vehicle hijacking event occurs. Note: Different from the explanation of intentional operation devices in GA2-19994.2.2, the anti-hijacking device must be concealed in the vehicle. When the alarm is triggered, it cannot be detected by other passengers in the vehicle except the triggerer, and it cannot affect the operating status of the VSAE. No passenger in the vehicle can cancel this type of alarm by hard power off or destroying the alarm device. The alarm can only be released by the monitoring center issuing a remote reset command based on the alarm situation. 3.8
Help alarm
An alarm signal generated by the VSAE's intentional anti-hijacking device when the vehicle or passengers need help. 3.9
Perimeter protection alarmAn alarm signal generated by the perimeter protection device when the VSAE is in the set alert state. 3.10wwW.bzxz.Net
volumetric protection alarm
Volumetric protection alarm
The alarm signal generated by the volumetric protection device when the VSAE is in the set alert state. 3.11
Self detection
The signal generated after the operation detection button of the VSAE is triggered. 3.12
Battery undervoltage signal lowbattery
The signal generated when the VSAE detects that the power supply voltage is lower than the specified value. 3.13
Monitoring center response
GA/T 440—2003
After receiving the hijacking alarm, help alarm or self-detection signal from the VSANE, the monitoring center returns a response signal to the VSANE that sent the signal to prove that the monitoring center has correctly received the signal. 3.14
Remote call
The command issued by the monitoring center to call a specified vehicle. 3.15
Remote flameout remoteflameout
The command of forced flameout issued by the monitoring center to the designated vehicle. This command blocks all functions of the VSAE remote controller. 3.16
Remote reset
The command issued by the monitoring center to the designated vehicle to cancel its hijacking alarm, perimeter protection alarm, three-dimensional protection alarm or remote flameout status, and restore the vehicle and its VSAE to the working status before the alarm. 3. 17
Remote set alarm
remote set
The command issued by the monitoring center to the designated vehicle to set the alarm. 3.18
Remote unset
The command issued by the monitoring center to the designated vehicle to unset the alarm. 3.19
VSANE response
After receiving the remote call, remote shutdown, remote reset, remote setting/clearing command signals from the monitoring center, the VSANE returns a response signal to the monitoring center to prove that the device correctly receives the signal. 4 General requirements
4.1 Interface configuration
VSAE and RCTE shall design the interface used for interconnection, including the asynchronous serial signal transceiver circuit, signal processor, connector and cable.
VSAE shall design a judgment device to distinguish the state of independent operation or network operation of the equipment. When VSAE operates as an independent device, it shall not send data to the interface, nor receive data from the interface. The interface shall not have any impact on the alarm and control logic of VSAE. Its electrical characteristics shall comply with the requirements of 2.1.2 and 2.1.7 of GB/T6107-2000.
4.2 Signal transmission mode
Asynchronous serial communication mode is recommended for signal transmission. The transmission format, transmission rate, necessary signal coding and extended signal coding range shall be specified.
The signal transmitted from VSAE to RCTE through the interface is the uplink signal. The signal transmitted from RCTE to VSAE through the interface is the downlink signal. The transmission signal coding shall be compiled in accordance with the provisions of 5.5. When RS485 or other communication methods that meet international standards are used, the manufacturer shall explain it in detail in the product manual, and all data formats and security shall comply with the requirements of this standard. 5 Electrical characteristics of the interface
5.1 Signal level
The electrical signal characteristics of the interface shall comply with the requirements of Chapter 2 of GB/T6107-2000. RS232E signal levels are recommended, as shown in Table 13
GA/T 440-2003
.
Binary state
Signal state
RS232E signal level
15 V~-3 V
Interchange voltage
+3 V~+15 V
When the transmission distance is less than 50 cm, the TTL level can be considered under the premise of ensuring that the bit error rate does not increase, as shown in Table 2. However, the signal level transmitted through the interface is required to be consistent. Table 2 TTL signal level
Binary state
Signal state
5.2 Communication format
Adopt asynchronous serial communication format.
+5 V~+2 V
Interchange voltage
Serial frame format: 1 start bit, 8 data bits, 2 stop bits, no parity bit. Convention: start bit is 0, stop bit is 1, idle bit is 1. See Figure 2. Asynchronous serial
Transmission direction
5.3 Transmission rate
Data bit
The recommended asynchronous serial transmission rate is 2400bps. 5.4 Interchange circuit
Asynchronous serial communication format
The characteristics of the signal shall comply with the provisions of 4.3 of GB/T6107-2000, the stop bit
idle bit
equivalent interface circuit number shall comply with the provisions of GB/T3454--1982, and the classification of interchange circuits shall be carried out in accordance with the provisions of 4.4.1, 4.4.2 and 4.4.3 of GB/T6107-2000, see Table 3. Table 3
Classification of interchange circuits
Circuit mnemonics
5.5 Signal coding
Interface circuit number
(i.e. GB/T3454 number)
Use 2-byte 8-bit ASCII coding.
Uplink signal coding
Uplink signal coding is shown in Table 4.
Circuit name
Signal common
Send data
Receive data
Circuit direction
To RCTE
From RCTE
Circuit type
Status information, alarm or response signal
(Local) Set alarm
(Local) Clear alarm
Hijacking alarm
Help alarm
Peripheral protection alarm
Three-dimensional protection alarm
Self-test signal
Battery undervoltage signal
VSANE response signal
5.5.2 Downlink signal coding
The downlink signal coding is shown in Table 5.
Command or response signal
Remote alarm setting"
Remote alarm release
Remote engine shutdown
Remote reset"
Remote call
Monitoring center response
HEX code
Table 4 Uplink signal coding
Signal classification
GA/T440—2003
After receiving the signal, the monitoring center needs to return the response signal to VSAE&aHSame as above
Same as hijacking alarm
To monitor Table 5 of the response of various command signals of the control center
Downlink signal coding
HEX coding
Signal classification
Can only be released by 2aH command
Can only release the alarm set by laH command
Can only be released by 5aH command
Release 31H, 51H, 61H and other alarms or 3aH command to VSANE's 31H, 41H, 71H and other signals. When VSAE receives this command, it should immediately suspend other actions being executed and execute this command. 5.5.3 Reserved signal coding range
In addition to the signal coding described in Tables 4 and 5, the reserved signal coding range for data transmission is agreed to provide the manufacturer and negotiated extension functions of VSAE and RCTE. Hexadecimal numbers are represented by x=1H~8H, y2H~9H, and z=BH~EH, where xyH is specified as the reserved code for the uplink signal and xzH is specified as the reserved code for the downlink signal. See Table 6. Table 6 Reserved signal coding range
Not used
Uplink signal coding
VSAE→RCTE
x2x3 1x4x5x6×7x8x9
Shedingjian
Downlink signal coding
RCTE-→VSAE
xb xc xd / xe
Similar signals in various signals (such as alarm, control or response signals) should be encoded in the same reserved section as much as possible. In order to avoid electromagnetic interference and bit errors caused by equipment startup, it is recommended not to use characters such as xOH and xfH. Mechanical characteristics of the interface
The structure of the interface (including cables and connectors) shall comply with the requirements of 4.2.8 in GA2-1999, 3.2 in GB/T6107-2000 and 5.1.5 in GB12663-2001. Use shielded cables with a length not exceeding 15m. The cables and connectors shall be reliably welded and fixed, and the mechanical strength shall refer to the requirements of 8.6 in GB12663-2001.
You can use a DB9 connector with a 3-wire connection. The wiring is shown in Figure 3, and its pin assignment is as follows: -RXD sends data
-TXD receives data
-SD signal ground
GA/T440-2003
Protective ground
Figure 3 DB9 connector wiring diagram
If fixing bolts are used, sufficient finger clearance space (greater than 15mm) should be reserved around the bolts for fixing operations. As shown in Figure 4.
Greater than 15 mm-
Figure 4 Reserved peripheral clearance for fixing bolts
The connection between VSAE and RCTE is shown in Figure 5. The interface demarcation point is located at the signal interface point of the pluggable connector between VSAE and RCTE. RCTE should be equipped with a connector with female contacts and male shells, and VSAE should be equipped with a connector with male contacts and female shells. The connector can be directly attached to the equipment or extended by a short cable with a total length of less than 1.5m. Demarcation point
Maximum 1.5m
Demarcation point
Maximum 1.5n
Less than 151
→: Connector with male contacts and female shells;>; Connector with female contacts and male shells Figure 5 Interconnection between VSAE and RCTE
When using other small connectors or terminals, it should be ensured that international standard devices are used, and reliable electromagnetic shielding is provided, and the connection is firmly connected by bolts, fixing piles or locking blocks.
7 Signal transmission and control
7.1 Signal transmission mode
The signal transmission mode is to use duplex mode to control the flow. The sending device sends 2 groups of signal codes to the receiving device one after another. The receiving device compares the two groups of codes received. If they are the same, it immediately returns the same code group to the sending device as a receipt. Otherwise, no signal is returned and the sending device waits for 0.5$ and then send 2 groups again, with a maximum of 8 retransmissions. The timing sequence of VSAE sending uplink signal coding to RCTE is shown in Figure 6. 6
VSAE sends
RCTE receives
VSAE sends
RCTE receives
RCTE sends
VSAE receives
1 Start bit
2 Stop bit1 Start bit Same code DATA
Same code DATA
GA/T 440--2003
2 Stop bit0～0.5s1 Start bit Acknowledgement DATA Acknowledgement DATA
Figure 6 Timing diagram of sending uplink signal coding
The timing sequence of RCTE sending downlink signal coding to VSAE is shown in Figure 7. RCTE sends
VSAE receives
RCTE sends
VSAE receives
VSAE sends
RCTE receives
1 start bit
【2 stop bits1 start bitSame code DATA
Same code DATA
2 stop bits0~0.5s1 start bitReceipt DATAReceipt DATA
Figure 7 Downlink signal coding and sending timing diagram
7.2 Signal transmission process
7.2.1 Set alarm
After VSAE is set to alarm, the signal 11H is transmitted to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE. 7.2.2 Release alarm
After VSAE is released to alarm, the signal 21H is transmitted to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE. 7.2.3 Hijacking alarm
After the VSAE's intentional anti-hijacking operation device is triggered, a local alarm action is generated, and the signal 31H is transmitted to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE. 7.2.4 Help alarm
After the VSAE's intentional rescue operation device is triggered, a local alarm action is generated, and the signal 41H is transmitted to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE. 7.2.5 Peripheral protection alarm
When the VSAE is in the set alert state, it receives the peripheral protection alarm signal. In addition to generating a local alarm action, it transmits the signal 51H to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE. 7.2.6 Stereoscopic protection alarm
When the VSAE is in the set alert state, it receives the stereoscopic protection alarm signal, generates a local alarm action, and transmits the signal 61H to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE. 7.2.7 Self-test
When the operation test button of VSAE is triggered, the signal 71H is transmitted to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE.
7.2.8 Battery undervoltage signal
When VSAE detects that the voltage of the power battery is lower than the specified value, the signal 91H is transmitted to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE.
GA/T 440—2003
7.2.9 VSAE response
When VSAE receives the command signal from the monitoring center, it shall automatically transmit the response signal 81H to RCTE through the interface. After RCTE receives it correctly, it sends a receipt to VSAE.
7.2.10 Remote alarm setting
RCTE transmits the remote alarm setting signal of the monitoring center to VSAE through the interface with 1aH. After VSAE receives it correctly, it sends a receipt to RCTE and executes the alarm setting action. 7.2.11 Remote de-alarm
RCTE transmits the remote de-alarm signal of the monitoring center to VSAE via the interface with 2aH. After VSAE receives the signal correctly, it sends a receipt to RCTE and executes the de-alarm action. 7.2.12 Remote shutdown
RCTE transmits the remote shutdown command of the blue control center to VSAE via the interface with 3aH. After VSAE receives the signal correctly, it sends a receipt to RCTE and executes the shutdown action.
7.2.13 Remote reset
When VSAE is in alarm state and continuously sends alarm signals to the monitoring center or the vehicle has been remotely shut down by the monitoring center, RCTE transmits the remote reset command of the monitoring center to VSAE via the interface with 5aH. After VSAE receives the signal correctly, it sends a receipt to RCTE and executes the corresponding reset action (stop alarm or cancel shutdown). 7.2.14 Remote call
RCTE transmits the remote call signal of the monitoring center to VSAE via the interface in 7aH. After VSAE receives it correctly, it sends a receipt to RCTE. Under normal working conditions, VSAE continues to return a response signal 81H to RCTE. 7.2.15 Monitoring center response
After the monitoring center receives the hijacking alarm, help alarm or self-test signal, it automatically returns a response signal to the VSAE that sent the signal. RCTE transmits the response signal of the monitoring center to VSAE via the interface in 8aH. After VSAE receives it correctly, it sends a receipt to RCTE and indicates the response to the user in a corresponding manner. 8 Equipment installation and document supply
8.1 Equipment installation
The installation of VSANE equipment or VSAE, RCTE and its interfaces shall comply with the requirements of GA366-2001. 8.2 Documentation
The manufacturer of VSANE or VSAE, RCTE shall provide the following technical documents and information for its equipment and interfaces: Instructions for use;
- Installation instructions;
- Specifications and models of interface connectors and cables;
- When using reserved codes for expansion, special instructions and coding rules shall be provided;
- A list of equipment and VSANS systems suitable for interconnection; Precautions, clarifying the problems and solutions that should be paid attention to during installation and use. The above documents shall not be disclosed to end users. 89VSAE response
When VSAE receives the command signal from the monitoring center, it shall automatically transmit the response signal 81H to RCTE through the interface. After RCTE receives the signal correctly, it shall send a receipt to VSAE.
7.2.10 Remote alarm setting
RCTE transmits the remote alarm setting signal of the monitoring center to VSAE through the interface with 1aH. After VSAE receives the signal correctly, it shall send a receipt to RCTE and execute the alarm setting action. 7.2.11 Remote alarm release
RCTE transmits the remote alarm release signal of the monitoring center to VSAE through the interface with 2aH. After VSAE receives the signal correctly, it shall send a receipt to RCTE and execute the alarm release action. 7.2.12 Remote flameout
RCTE transmits the remote flameout command of the blue control center to VSAE through the interface with 3aH. After VSAE receives the signal correctly, it shall send a receipt to RCTE and execute the flameout action.
7.2.13 Remote reset
When VSAE is in alarm state and continuously sends alarm signals to the monitoring center or the vehicle has been remotely shut down by the monitoring center, RCTE transmits the remote reset command of the monitoring center to VSAE via the interface with 5aH. After VSAE receives it correctly, it sends a receipt to RCTE and performs the corresponding reset action (stop alarm or cancel shutdown). 7.2.14 Remote call
RCTE transmits the remote call signal of the monitoring center to VSAE via the interface with 7aH. After VSAE receives it correctly, it sends a receipt to RCTE. Under normal working conditions, VSAE continues to return a response signal 81H to RCTE. 7.2.15 Monitoring center response
After the monitoring center receives the hijacking alarm, help alarm or self-test signal, it automatically returns a response signal to the VSAE that sent the signal. RCTE transmits the response signal of the monitoring center to VSAE via the interface with 8aH. After VSAE receives it correctly, it sends a receipt to RCTE and indicates the response to the user in a corresponding manner. 8 Equipment installation and document provision
8.1 Equipment installation
The installation of VSANE equipment or VSAE, RCTE and their interfaces shall comply with the requirements of GA366-2001. 8.2 Document provision
The manufacturer of VSANE or VSAE, RCTE shall provide the following technical documents and information for its equipment and interfaces: Instructions for use;
- Installation instructions;
- Specifications and models of interface connectors and cables;- When the reserved coding is extended, special instructions and coding rules shall be provided;- A list of equipment and VSANS systems suitable for interconnection shall be provided; Precautions shall be provided, clarifying the problems and solutions that should be paid attention to during installation and use. The above documents shall not be disclosed to end users. 89VSAE response
When VSAE receives the command signal from the monitoring center, it shall automatically transmit the response signal 81H to RCTE through the interface. After RCTE receives the signal correctly, it shall send a receipt to VSAE.
7.2.10 Remote alarm setting
RCTE transmits the remote alarm setting signal of the monitoring center to VSAE through the interface with 1aH. After VSAE receives the signal correctly, it shall send a receipt to RCTE and execute the alarm setting action. 7.2.11 Remote alarm release
RCTE transmits the remote alarm release signal of the monitoring center to VSAE through the interface with 2aH. After VSAE receives the signal correctly, it shall send a receipt to RCTE and execute the alarm release action. 7.2.12 Remote flameout
RCTE transmits the remote flameout command of the blue control center to VSAE through the interface with 3aH. After VSAE receives the signal correctly, it shall send a receipt to RCTE and execute the flameout action.
7.2.13 Remote reset
When VSAE is in alarm state and continuously sends alarm signals to the monitoring center or the vehicle has been remotely shut down by the monitoring center, RCTE transmits the remote reset command of the monitoring center to VSAE via the interface with 5aH. After VSAE receives it correctly, it sends a receipt to RCTE and performs the corresponding reset action (stop alarm or cancel shutdown). 7.2.14 Remote call
RCTE transmits the remote call signal of the monitoring center to VSAE via the interface with 7aH. After VSAE receives it correctly, it sends a receipt to RCTE. Under normal working conditions, VSAE continues to return a response signal 81H to RCTE. 7.2.15 Monitoring center response
After the monitoring center receives the hijacking alarm, help alarm or self-test signal, it automatically returns a response signal to the VSAE that sent the signal. RCTE transmits the response signal of the monitoring center to VSAE via the interface with 8aH. After VSAE receives it correctly, it sends a receipt to RCTE and indicates the response to the user in a corresponding manner. 8 Equipment installation and document provision
8.1 Equipment installation
The installation of VSANE equipment or VSAE, RCTE and their interfaces shall comply with the requirements of GA366-2001. 8.2 Document provision
The manufacturer of VSANE or VSAE, RCTE shall provide the following technical documents and information for its equipment and interfaces: Instructions for use;
- Installation instructions;
- Specifications and models of interface connectors and cables;- When the reserved coding is extended, special instructions and coding rules shall be provided;- A list of equipment and VSANS systems suitable for interconnection shall be provided; Precautions shall be provided, clarifying the problems and solutions that should be paid attention to during installation and use. The above documents shall not be disclosed to end users. 8
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