Product Block Diagram
RD-800 has the complete RF receiving and transmitting circuit and interface, main components are as followings: DSP processor, circuit of RF frequency, memory, power and system connector and all can connect outer antenna. When through system connector is able to link 8 sets control signal input port and 8 sets equipment control output port.
In Chart 1, inside the red line frame is the each component part of the main board of RD-800. The outside of red line is outer interface. RD-800 main board has finished all the function of wireless control. Include RF specification and the code of RF data, regulation frequency indication. Additionally, the main board also include: 8 sets control signal input port and 8 sets equipment control output port. LED light instruction. Following, we will separate to introduce each part function of main board and outer interface.
Introduction of Each Function
DSP processor finished all signals handle function of RD-800HI, including receiving and transmitting RF data, LED light instruction, and judgment of the button.
Circuit of radio frequency
The circuit of radio frequency offers the pass way of receiving and transmitting of 902~928MHz. Including receiving circuit, transmitting circuit, frequency compose the circuit.
The memory is mainly used in storing the present working frequency and RF transmitting speed.
Circuit of the power
Circuit of the power offered AC 24~28V or DC 20~28V input in power supply.
Indication Position Item Description 1 AC/DC Input Outer power input 2 Controlled Signal Input Provide 8 sets signal input 3 Device Controlled Output Provide 8 sets signal output 4 Antenna The position for antenna insert. 5 Setting Key Function setting 6 Track Put in the position of aluminum track
8 PIN In and 8 PIN Out, simple terminal PIN In, may penetrate the dip switch to control, also may penetrate the PC to control. When it's no signal, it demonstrates that the input -output has the photocoupler to be the interface, and prevents the wave form of applied voltage.
RD-800 is a module of 8 points PIN In and PIN Out, including transceiver and receiver module TRW-909HI (902~928MHz),greatly reduce consumer's operational complexity, 8in8out I/O not only penetrates the Terminal to finish wiring easily, but also can permeate the PC control, proceed a pair of many communications.
For duplex wireless RF transceiver product
Wireless 8 in-out control box
8 sets of equipment input control
8 sets of equipment output control
Effective reducing the connecting cost of the equipment
Automatic switching devices
Frequency : 902~928MHz
Distance : 150M (Straight-line distance under open space)
Number of Channels : 16
Consumption Current : 36mA (MIN disconnect)
8 PIN in and 8 PIN out.
Simple terminal PIN in.
May penetrate the switch to control
Possess showing if have signal´s function.
It demonstrates the input -output has the photocoupler to be the interface, and prevents the wave form of applied voltage.
Item Specification Remark Voltage Range AC:24~28V ; DC:20V~28V Frequency Range 902~928MHz Output Power 0.5W (2W special demand) Antenna 1/4λ wire antenna Gain of 2.14 dBi or less Antenna Power Within 8 (+20% -50%) Contact (50 Ω) Modulation System Binary FSK Oscillation System PLL synthesizer system Radio Communication Speed 10Kbps Number Of Channels 16 Receiver Sensitivity -112 dBm (1200 bps) Packet error rate 1%
(253 bytes/1 packet)
Working Temperature -10℃ ~+70℃ Storage Temperature -30℃ ~+95℃ Consumption Current MAX:300mA