Manual

HXJZ-877 Mini Power Wireless Module User’s Manual
About HXJZ-877
HXJZ-877, 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 apparatu s, 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 sec urity, powerhouse
equipment wireless monitor, entrance control system, etc. It provide the USB power interface to be convenient
for the mini computer and PC users if necessary.
HXJZ-877 Feature
1.Ultra low power transmission
Transmission power: 500mW, hi gh receiving sensitivity: -123dbm,
Size: 63mm*43mm*15mm
2. Low power consumption
Receiving current<45mA, transmission current<360Ma, sleeping current <1mA.
3. Saving power model
HXJZ-877 have three saving power models: awaken from Hardware, awaken from COM Port, awaken from
Air;
4. ISM frequency band, not requiring on application of frequency point
Carrier frequency of 433MHz ，also capable of 868/915MHz.
5. High anti-interference and low BER (Bit error Rate)
Based on the GFSK modulation mode, it adopts the efficient communication protocol. T he actual bit error
rate of 10-5 ~ 10-6 can be achieved when channel bit error rate is
6. Long transmission distance
Within the range of visibility, the reliable transmission distance is （BER=10-3/1200bps） >3000m when the
antenna height is greater than 3m (BER=10-3/9600bps).
7. Transparent data transmission
Transparent data in terface 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
8. Multi-channel and speed
The standard HXJZ-877 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.
9. High speed wireless communication and Large data buffer
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.
10. 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