Hexin Technology HXJZ-882 2000m-2500m Low Power RS-232/RS-485/TTL to RF Wireless Module - Manual (Page 4)

HXJZ-882 Micro Power Wireless Module User’s Manual
2.HXJZ-882 interface definition
1) User’s interface
HXJZ-882 have one interface of TTL/RS232/RS485, user can choose one.
In standard interface, the plastic socket gap upward, from left to right, is 1-9 pin in turn, as follows:
Definition of connecting pins and connection method:
Item no PIN Description User’s terminal Remarks
1 SLE Sleep control input end Low lever into
sleeping,
and high lever awaken
2 TXD/RS-485(A) Serial data transmitting RXD/RS-485(A)
3 RXD/RS-485(B) Serial data receiving TXD/RS-485(B)
4 GND Power supply/Ground DGND/AGND
5 VCC +5±0.5V +5V
6 I2 Input of 2 nd on and off Output terminal of On and Off
7 I1 Input of 1st on and off Output terminal of On and Off
8 O2 Output of 2 nd on and off Input terminal of On and Off
9 O1 Output of 1st on and off Input terminal of On and Off
Remarks: To avoid to connect the interface reverse and can not communicate, please check and assure the
voltage of 3 and 4 pin is existing by using multimeter. If there is one pin that has the voltage, another has not
voltage, which means the interface is connected reverse, please change the connection wires between pin 3
and 4.
2) Power supply
HXJZ-882 uses DC power supply with voltage of +5V. It can also share power supply with other
equipment, however, the high quality power supply with desirable ripple factor should be selected. In addition,
the reliable grounding must be used if there is other device in the system equipment. In case of failure to
connect with the earth, it can form its own grounding, but it must be absolutely separated from the municipal
electric supply.
3) The use of IO
HXJZ-882 supply two set of IO for the users as follows: