Wireless gsm modem industrial gprs 3g 4g dtu with rs232 rs485 for m2 m smart charging pile solution

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 whatsapp: +86-13720875034
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Tel:+86 592 5901215 Web: www.caimore.com/emain.asp1
Wireless gsm modem industrail GPRS 3G 4G DTU with RS232
RS485 for M2M smart charging pile solution
Key words: Wireless gsm modem; Industrial DTU; GSM GPRS DTU; GSM GPRS modem;
GSM modem RS232; smart charging pile; wireless 3G 4G DTU; modem with RS232
RS485; M2M solution
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.

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2. Application Prospect
Since charging pile’s function is similar to tanker, this particularity purposes
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.

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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
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 wireless DTU to automatically
resolve the domain name address, connect to the service side of the charging pile
management platform, and then provide a variety of real‐time data acquisition for the
new energy and transportation industries, transmission, distribution, remote

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management and control, remote wireless data transmission.
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 DTU, various 2G / 3G / 4G wireless networks and communications
networks, charging pile systems management platform software and so on.
1, Caimore wireless data transmission DTU provides RS232 / RS485 / RS422/TTL

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interfaces for connection with charging pile. If the charge pile have a ethernet
interface, you can choose Caimore’s another series wireless router for connection;
2, Wireless DTU through a variety of wireless networks to send the data of various
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

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wireless networks, DTU 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 ;；
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 DTU issued various work
orders 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. Why Caimore
Caimore Communication devotes herself to IOT and the industrial automation fields ,
provides wireless products and video surveillance solution for remote site. Due
toahering to the concept of " Quality First, Customer Utmost", Caimore has established
9 branchs, 66 agents in the in the demostic till now. Meanwile, Caimore wireless
products have been exported to more than 16 country on aboard. Such as India, Indone
sia, Thailand, Kuwait, Norway, Ghana, Russia, Chile, USA etc.
Now Caimore's porducts has won won a high respect of most of customer at ho
me and aboard, due to its stable high quality and effeient service.

Wireless gsm modem industrial gprs 3g 4g dtu with rs232 rs485 for m2 m smart charging pile solution

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