Hexing Electrical MJN916 DCU HexNet User Manual

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Document ID	3298289
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Document Description	Users Manual
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Document Type	User Manual
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Date Submitted	2017-02-28 00:00:00
Date Available	2017-02-28 00:00:00
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DCU HexNet
MJN916
User Manual
Version
Maker
Date
V0.0.1
WangGang
2017.01.20
Hexing Electrical Co.,Ltd.
〉〉〉DCU HexNet MJN916
1.Product Introduction
The DCU HexNet is a highly integrated half-duplex micropower wireless
data transmission device.The DCU HexNet embedded high-performance RF
chip.User programming has very good flexibility. DCU HexNet operating
frequency include 916.25-926.65MHz. The real figure as shown in the figure
below.
This DCU HexNet is mainly used in power system, electricity
information collection system. Mainly include the following equipments：
Data Collector，Data concentrator，etc.
2.RF Module Chip Block Diagram
3.RF Module Pin Definition
Pin number
Signal name
Signal category
Signal direction
1,2
GND
GND
3,4
VCC
Power
RXD
Uart transmit Pin
TXD
Uart receive Pin
D3.3V
Power
/RST
RESET Pin
10‐22
5. RF operation
Insert the HexNet on user’s device，can use uart to communicate with HexNet.User
don’t change anyting of the device，they will very easy to set up their communication
network.
6. Installation instructions
Please insert MJN916 on the corresponding interface, and ensure the pin interface
definitions are consistent with MJN916.
Interfaces are defined as follows：
1
PIN
PIN
Interface
definition
Signal
category
1,2
GND
GND
3,4
VCC
Power
Communication module analog
part of the power supply, voltage is
5 v to 15 V.
Signal
Communication module data
reception (3.3 V TTL level), serial
port communicating with the base
table.Receive to module
Communication module data
(TTL3.3 V level), serial port
communicating with the base
table.Send from module
RXD
TXD
Signal
Direction
Description
GND
Power provided by the module,
communication module of digital
part of power, voltage of 3.3 V + / ‐
5%, the minimum current 50 ma,
with VCC power supply, the
isolation optical coupling used to
drive the communication interface.
D3.3V
Power
Reserved
/RST
Reset
Reset module (low level effectively,
effective
level
time
100
milliseconds)
Equipment flip cover and seal
Terminal equipment using the lid well
Provide equipment machine right alternating current (AC) on the site
Equipment terminal cover screw to play well, and make seal
Installed in the sample
Installed in the sample
Installed in the sample
DCU models only for reference.
Note：
1 Thank you for using products of Hexing Electrical Co., Ltd. Please read this
warning before using our products. If you have already started to use is that you have
read and accept our all this.
2 All the final explanation and modification rights for all materials were reserved by
Hexing Electrical Co., Ltd.
7. FCC Warning:
Any Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC Radiation Exposure Statement:
To satisfy FCC RF Exposure requirements for this transmission device, a separation distance of
20cm or more should be maintained between the antenna of this device and persons during
operation. To ensure compliance, operation at closer than this distance is not recommended. The
antenna(s) used for this transmitter must not be co-located or operating in conjunction with any
other antenna or transmitter.

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