Hexin Technology HXJZ-875 User Manual
HXJZ-875 Low Power Wireless Module
User’s Manual
HXJZ-875 Low Power Wireless Module User’s Manual
About HXJZ-875
HXJZ-875, the Low power wireless module, is used as the wireless data transmission in short distance.
With the small size, weight and power consumption and good stability and reliability, it has the function
of bi-directional data sign transmission, test and control.
It is used for Wireless meter reading, such as water meter, electric meter and gas meter, parking meter,
intellective card, electronic weighing apparatus, meter for checking on work attendance, queue wireless meter,
building control, shipping company control, alarm system, intelligent equipment, Automatic data
collecting system; Industrial remote control and remote test building automation, safety and
security, powerhouse equipment wireless monitor, entrance control system, etc.
It can provide the USB power interface to be convenient for the mini computer and PC users if necessary.
HXJZ-875 Feature
1.Ultra low power transmission
Transmission power: 2W/1W, it can set according to the user’s request.
High receiving sensitivity: -123dbm.
2. Low power consumption
Transmission current<1.5A, receiving current<50mA, sleeping current < 1mA.
3. ISM frequency band, not requiring on application of frequency point
Carrier frequency of 402---470MHz, the default is 428~436MHZ.
4.Working frequency
The working frequency is -40℃～+85℃,the stability can be ±5PPM.
5. Interface
It can supply three kinds of interface: RS-TTL, RS-232, RS-485.
6. Power saving model:
It can supply one sleeping model: awaken from hardware.
7. High anti-interference and low BER (Bit error Rate)
Based on the GFSK modulation mode, it adopts the efficient communication protocol. The actual bit error
rate of 10-5 ~ 10-6 can be achieved when channel bit error rate is 10-2.
8. Long transmission distance
Within the range of visibility, the reliable transmission distance can be 2km to 10km, when the antenna is
higher than 3km.
9. Transparent data transmission
Transparent data interface is offered to suit any standard or nonstandard user protocol.
Any false data generated in the air can be filtrated automatically (What has been
received is exactly what has been transmitted). The charge time for receiving and sending <10ms.
10. Multi-channel and speed
The standard HXJZ-875 configuration provides 16 channels. to meet the multiple communication combination
mode of the users. It has baud rate to be chosen such as 1200bps、2400bps、4800bps、9600bps、19200bps、
38400bps. The wireless transmission rate is direct ratio with baud rate of interface to meet user’s equipment
requirement.
11. High speed wireless communication and large data buffer
HXJZ-875 Low Power Wireless Module User’s Manual
When the speed rate in the air is quicker than interface’s, allowing to transmit unlimited length data at one
time, when the speed rate is slower or equal the interface’s, allowing the transmission of 255 Bytes long data
frames at one time for more flexible programming by users.
12. Intelligent data control and the user doesn’t need to prepare excessive programs
Even for semi duplex communication, the user doesn’t need to prepare excessive
programs, only receiving/transmitting the data from the interface. HXJZ-875 will automatically
complete the other operations, such as transmission/receiving conversion in the air, control, etc.
13. High reliability, small and light
Single chip radio- frequency integrated circuit and single chip MCU are used for
lessened peripheral circuits, high reliability, and low failure rate.
14. Watchdog monitor
Watchdog monitors the inner function, so that change the traditional product structure and
improve the product reliability.
Application of HXJZ-875
1.Appearance figure
2.HXJZ-875 interface definition
1) User’s interface
HXJZ-875 have interface of TTL/RS232/RS485, user can choose
one. Definition of connecting pins and connection method:
Item no.
PIN
Description
User terminal
Remarks
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