Xiamen caimore’s rtu applied in charging pile solution based on wireless monitoring technology

Xiamen Caimore Communication Technology Co.,Ltd
2 F, 37#, Wanghai Road, Software Park 2, Xiamen,China (361009)
Contact person: Cynthia Wang E-mail: sales09@caimore.com
Skype: caimoremodem Mobile phone: +86-13720875034
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Tel:+86 592 5901215 Web: www.caimore.com/emain.asp1
Xiamen Caimore’s RTU applied in charging pile solution based on
wireless monitoring technology
Key words: Wireless RTU; Industrial RTU; Charging‐pile; New; New energy; Internet +
1. Charging pile
Charging pile is a power plant of new energy‐powered vehicles, which is similar to
the tanker of gas station. Each charging pile is equipped with charging plug for kinds of
electric vehicle’s charging, according to different voltage levels. Electric car charging pile
uses AC, DC power supply. After brushing up the charge cards, charging pile will display
charging capacity, charge time, expense and other data, and then print documents to
achieve timing charging and metering charging.
2. Application Prospect
Since charging pile’s function is similar to tanker, this particularity purposes

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determine its constructions is characterized by multiple measured points, dispersion,
wide coverage, long communication distance, and need to focus on management.
With the rapid development of new energy vehicles, it request more flexibility and
scalability network topology structure. Therefore, it need to consider the following
issues when you choose the communication mode of electric car charging pile.
(1) The reliability of communication‐‐the communication system need to withstand
the harsh environment of long‐term and strong electromagnetic interference or noise,
and to maintain the smooth flow of communication.
(2) Construction costs‐‐it need to consider the construction cost, long‐term using
and maintenance cost in meeting the reliability of premise.
(3) Bi‐directional communication ‐‐it is not only to achieve the amount of
information uploaded, but also to achieve a controlled amount of release.
(4) Multi‐service data transfer rate‐‐with the growing volume of terminal business
in future, the communication between the master station and the sub‐station or
sub‐station to the terminal communication, will have a high request on multi‐service
data transfer rates
(5) Communication flexibility and scalability‐‐due to the characteristics of
multi‐surface control point, wide and dispersed surface, charging pile will use a standard
communication protocol. With the growing business of electric power operation and
“ALL IP” network technology’s development, IP‐based services need to be considered
bearer, and also require to facilitate the installation and construction, commissioning,
operation and maintenance.
3. Communication mode
Electric car charging pile belongs to the distribution network side, their means of
communication and distribution automation are often considered together.
Communication is a key and difficult point of distribution automation. Different regions

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and conditions will lead to various communication application; specific to the electric
car charging pile, its communication mode are wired and wireless:
(1) Wired communication
Wired communication: wired ethernet(RJ45 cable, optical fiber), industrial serial bus
cable (RS485, RS232, CAN bus wire)
The main advantages of wired Ethernet are reliable data transmission, large
network capacity; the disadvantages are wiring complexity, poor scalability and
high construction costs, inflexible.
Industrial serial bus’s (RS485, RS232, CAN bus) advantages are reliable data transmission,
simple design; the disadvantages are complex distribution network, poor scalability and
high construction costs, inflexible, low traffic capacity.
(2) Wireless communication
Wireless communication is main using carrier's wireless network data to access
services, such as: GPRS / CDMA / TD‐SCDMA / WCDMA / EVDO and 4G LTE
networks updated.
Advantages: low cost, short construction period, adaptable, scalable, and easy
to maintain and easy expansion.
Therefore, a fixed IP or dynamic IP (available binding domain) and the port number
which be provided from broadband cable networks according to 2G / 3G / 4G wireless
data transmission technology, will be set by Caimore’s RTU to automatically resolve
the domain name address, connect to the service side of the charging pile management
platform, and then it can provide a variety of real‐time data acquisition (including digital
acquisition and analog acquisition) for the new energy and transportation industries,
transmission, distribution, remote management and control, remote wireless data
transmission.

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4、System composition and networking
In the past three years, Xaimen Caimore has realized the gross volume applications
of electric vehicle charging pile items on the NARI, XJ Electric, Shenzhen BYD, and other
users, to achieve a self‐charging technology based on embedded intelligent electric car
pile end solutions and products. The overall system structure is shown as below:
Charging pile system topology
This system is consisted of AC / DC charging pile, Caimore wireless data
transmission terminal RTU, various 2G / 3G / 4G wireless networks and Communications
networks, charging pile systems management platform software and so on.
1, Caimore wireless data transmission RTU provides RS232 / RS485 / Ethernet / USB
interfaces for charging pile and other corresponding supporting devices to connect;
2, Wireless RTU through a variety of wireless networks to send the data of various

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charging pile for the server‐side charging system management platform by transparent
wireless way, system platform software including metering and billing system, charging
monitoring system, power distribution monitoring system, security monitoring and
control systems.
Charging pile terminal analysis chart
Electric car charging pile uses AC and DC power supply, without refueling, aerated,
avoid to exhaust emissions & pollution of the environment, in line with China future
urban development concept of the core elements of low‐carbon.
5.System functions
The system can achieve the following functions:
1, real‐time data transmission function: Through by 2G / 3G / 4G variety of
wireless networks, RTU has a ability to transfer the real‐time data of charge pile
transparently (intact) to the server back‐end’s charging pile systems
management platform ;；

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2, charging pile systems management platform software mainly realizes include
metering and billing management system, charging monitoring system, power
distribution monitoring system, security monitoring systems that several large
pieces of application functionality;
3, remote monitoring capabilities: server management platform can monitor
the operation of the charging pile, including uploading electricity transmitter,
circuit breakers, industrial host, billing, touch screen, sensors and other
equipment operating parameters, or through wireless RTU various work orders
issued to the charging pile terminal equipment;
4, remote alarm maintenance functions: real‐time monitoring of running status
charging pile, once the fault alarm occurs, you can debug or upgrade remote
maintenance, the timely processing of abnormal charging pile terminal
problems;
5, application extensions: APP software that can access to third‐party , using
Caimore’s GPS positioning device and the corresponding system software,
directly charging the phone APP user, you can achieve on a map addressing and
navigation functions.
6. Caimore RTU wireless data transmission
terminal presentation
Caimore CM550 series intelligent wireless remote control terminal (hereinafter
referred to as wireless RTU)is a wireless terminal control products which is developed
by Xiamen Caimore Communication Technology Co., Ltd. to meet market demand and
self‐developed data acquisition, remote control and wireless communication capabilities
after years of practice and engineering applications.This series of products integrate

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analog signal acquisition, digital input, digital output, pulse counting, supports Ethernet
communication, serial communication, RS485 communication and 4G / 3G / 2G wireless
data communication in high‐performance integrated measurement and control devices,
can be directly connected the various sensors, standard transmitter signal,
instrumentation, and other analog signal output, level signal, dry contact, pulse signals,
that is the best choice to implement for wireless monitoring and control.
CM550 series uses high‐performance 32‐bit industrial‐grade and industrial‐grade
wireless communications processor module, embedded real‐time operating system
software provides online support platform to maintain technical equipment to maintain
data terminals permanently online and save data link unblocked at any time, to achieve
high‐speed, stable and reliable data acquisition and control functions.
6.1 Caimore RTU’s function advantages
1) Various interfaces: Provide RS232 or RS485 or TTL or RS422 or USB or RJ45 Ethernet
interface and support all kinds of interface;
2) Perfect network support: Provide 2G (GSM), 2.5G (GPRS), 2.75G (EDGE), 3G (WCDMA,
EVDO, TD‐SCDMA), 4G (TDD, FDD) and support products for all kinds of network;
3) Support 6 channel counter inputs, 8 digital inputs, 8 channel analog inputs, 4 channel
digital outputs, 2 channel PWN outputs, 4 channel relay outputs
4) Support GPS/ Beidou positioning;
5) Support ZIGBEE wireless network communication with low power consumption at
short range;
6) Three‐tier system protection: based on the original two (software protection +WDT +
CPU built‐in protection) system protection, it adds stair system VWM (Virtual Man
Watch) detection function to ensures that the stable & reliable system;
7) Metal shell: using metal case to anti‐radiation & anti‐interference; shell and system
security isolation, lightning protection design; meeting the power requirements of safety

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regulations; protection rating IP41; particularly suitable for harsh industrial control field;
8) Industrial grade design, support 5‐32V power supply;
9) All wireless modules are certified by the CGD or FCC certification or CE certification;
10) Industrial CPU with stable and reliable performance, Intelligent anti‐dropped, online
testing, online maintenance, automatically reset to ensure that equipment is always
online;
11) Enlarge memory: FLASH 64Mbits, SDRAM, 256Mbits; a large enough memory to
store programs and data;
12) Automatically obtain DNS: automatically acquire DNS and no longer need manual
configuration to input DNS; avoid the serious DTU crash resulted from wrong choice of
the abnormal DNS server;
13) Complete protocol stack: the new system loaded complete TCP / IP protocol stack,
using comprehensive TCP / IP protocol stack, so that network traffic performance shows
outstanding and the drop‐line probability dramatically reduced;
14) EMC performance outstanding: passed 3000V electrical shock test, especially
suitable for the condition of harsh industrial environments; system EMC / EMI
performance excellent and system is stable and reliable; it has passed CE certification
and EMC test;
15) Support SMS remote configuration, remote controlling, support SMS alarming;
16) Intelligent anti‐dropped, online testing, online maintenance, automatically reset to
ensure that equipment is always online;
17) Support remote WEB configuration, remote control, remote upgrade.
6.2 RTU series products qualification and testing
1, wireless communication online maintain patent technology
2, Moore Laboratory’s high and low temperature test report
3, Product Quality Inspection Detection of Fujian Institute

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4, copyrights certificate
5, EMC test report
6, the state compulsory 3C certification
7 Caimore qualification
Certification and Honor:
2009 Caimore's GPRS DTU product was named "Innovation Award";
2011 Caimore was awarded "Best Supplier of Customer Satisfaction in China's Industrial
Control Sector"
2012 Caimore becomes a member of China Association For Quality Promotion
2013 becomes a member of Intelligent PEB Industry Technology Innovation Strategic
Alliance;
2010 Caimore was certified as state high‐tech enterprises;
2010 Caimore was certified as state dual‐soft enterprise.
Caimore has a patented technology certificates and keep the device steady 12 software
copyrights certificate; we have set up nine regional offices, 66 agents in the domestic
to provide customers with convenient proximity Care;its registered capital is 12.8
million; and it is Xiamen focus on supporting high‐tech enterprises; 12 years of industry
research and development and industrial applications accumulation test.
8 Conclusion
Vigorously promote the charging infrastructure, solving the problem of electric
vehicle charging has been an important guarantee for the development of new energy
automotive industry, to create a public entrepreneurship, innovation and the
enhancement of public goods, "double engine" public services, to achieve steady growth,
adjusting the structure, benefits livelihood has important significance.

Xiamen caimore’s rtu applied in charging pile solution based on wireless monitoring technology

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