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RD-485
Instruction Manual P.4
Introduce
RD-485 is for a two-way wireless data transmission products and work for the
868~ 928MHz frequency, mainly to provide wireless half duplex RF transceiver.
RD-485 provide a RS232 (TTL level) and RS485 interface (TTL level), as long
as the user interface in support of the application of internal and RS485 or
RS232 communications, will be the standard serial interface for wireless data
transmission. There are several transfer modes as following:
Broadcasting mode: a transmitter can be connected with all distances in the
launch of the RD-485.
Point-to-point transmission mode: through the instructions set, it will send the
information required to specify the ID on the RD-485.
In this paper, a detailed description of RD-485 wireless two-way RF transceiver
related hardware interface and instructions for use.RD-485 as a complete
collection of RF circuit, particularly suited for wireless products, such as
monitoring, scheduling, data transmission, industrial control, wireless meter
reading system. It can also direct as end products, information transmission,
and the use of a wide range.
RD-485 use TRW-V4B-D RF module, application is
more light.
Function Block Diagram
Chart 1 RD-485 function block diagram
RD-485 sets a complete circuit and RF transceiver interface, Figure 1 is for the
RD-485 features diagram. The main components include: MCU processor, RF
circuits, memory, and power and system connector. It can be an external
antenna. Besides, the system connector can connect an external power supply,
serial interface, RS485 interface. In Figure 1, red box for the RD-485 within the
various components of the motherboard, but the red line is for the external
interface. RD-485 motherboard completed a wireless data transmission of all
the features, including RF norms and RF data encryption, such as radio
frequency calibration instructions. There is also: RS232 interface and RS485
interface, LED indicator light. And followings will be briefed on the motherboard
and external interfaces, and other parts of the function.
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