View source for Active RS232 to RS422/RS485 Serial Converter Bidirectional Converter Adapter

[[File:CQR1218-1.jpg| right |thumb|400px|RS232 to RS422/RS485 Serial Converter]]
=='''Introduction'''==
CQR1218 is a universal RS232 to RS485/RS422 bidirectional converter, designed to extend the RS232 transmission distance and the interface converter designed for the RS485/RS422 bus, which consists of a number of CQRobot independent innovation technology. It Includes built-in data collision protection control, the power supply and signal lights and inhibition of TVS transient voltages protection. In order to adapt to RS422 / RS485 with much bus wiring, it provides a terminal at port, DB9 and RJ45 physical interface, that effectively adapt to a variety of connection mode, making the bus from multiple directions to be better contacted and more convenient to be implemented. The equipment adopts the aluminum shell of sandblasting and anti-oxidation, which can effectively shield the external interference and have good heat dissipation.

'''CQR1218 interface converter supports the following four communication modes:'''

*Point to point / 4 full duplex.
*Point to multi-points/four-line full-duplex.
*Point to point/twine and half duplex.
*Point to multi-points/two-line and half duplex.

To prevent the reflection and interference of the signal, a matching resistor is needed at the terminal of the line (the parameter is 120 ohm 1/4w) when the converter is used as full duplex or half duplex wiring.

=='''Features'''==
*Built-in data collision protection control DCPC function.
*The baud rate is adaptive
*LED indicates power and signal status.
*The maximum support is 32 nodes.
*RS232 port protection: 15KV ESD.
*The RS485/RS422 port provides surge protection. With Lightning protection of 600W.
*The data is bidirectional.
*9V-18V / DC, Power Supply, With EU UK US Plug.
*It does not require a handshake signal to achieve transparent transmission.
*Plug-and-Play, NO Need to Drive. Supports Windows98 / Windows2000 / XP / Vista / Win7 / Win8 / Win10 / ME, Linux, MAC, Android, Arduino.

=='''Apllacations'''==

* Singlechip, Surveillance Camera
* Barcode Scanner
* Fingerprint Attendance Machine
* Computer PDA (WINCE system)
* Label Printer
* Engineering Exchange
* Industrial Control
* Safety Access Control

Factory automation system, Distributed control system, Other 485/422 serial device wireless network, LED INFO display equipments, PLC control and management, SCADA, measuring instruments and monitoring system, CNC management, Medical treatment/medication automation, Building automation, Check on work attendance/Human resource management

=='''Display'''==
{|-
|[[File:CQR1218-2.jpg |left|300px]]
|[[File:CQR1218-3.jpg |none|300px]]
|[[File:CQR1218-4.jpg |none|300px]]
|[[File:CQR1218-5.jpg |none|300px]]
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{|-
|[[File:CQR1218-6.jpg |left|300px]]
|[[File:CQR1218-7.jpg |none|300px]]
|[[File:CQR1218-8.jpg |none|300px]]
|[[File:CQR1218-9.jpg |none|300px]]

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=='''Specification'''==
*Working Voltage: 9V-18V / DC, Power Supply For RS232 to RS422/RS485 Serial Converter With EU UK US Plug.
*Interface characteristics: The interface is compatible with EIA/TIA's RS-232c, RS-485 / rs-422 standard.
*Electrical interface: Connector with RS-232 interface to input DB9; RS-422 / RS-485 interface: Terminal, RJ-45 and DB9.
*Protection level: RS-422, RS-485 interface with 600W lightning surge protection of each line.
*Working mode: Half-duplex asynchronous or full-duplex asynchronous.
*Signal indication: Three signal indicator light of power supply (PWR), send (TXD), receive (RXD).
*Transmission medium: Twisted pair or shielded wire.
*Transmission rate: 115.2k BPS to 300M/38.4 K BPS to 38.4 KM/9600 BPS to 5 km.
*Dimensions: 113mm * 55mm * 25mm.
*The using of environment: 25 Degree Celsius to 70 Degree Celsius, relative humidity of 5% to 95%.
*Transmission distance: 1200 m (115200bps-9600bps).

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=='''Connectors and Signals'''==
{|-
|[[File:CQR1218-10.jpg |left|400px]]
|[[File:CQR1218-11.jpg |none|430px]]
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=='''Hardware Installation and Application'''==
Please read the instructions carefully before installing the dt-9018 interface converter. Connect the communication cable of the product to the RS-232 interface, and make sure the power adapter is connected to the socket. This product uses the general connector as the input/output interface, and no jumper setting and it can automatically realize the RS-485 or RS-422 communication mode. Double stranded wire or shielded wire can be used. It is very convenient to connect and disassemble. T/R+T/R- for launch, RXD+/RXD- for reception, VCC for input or output power, GND for public ground, Point-to-point, point-to-points, half-duplex communication to two lines T/R+, T/R-, point to point, point to point, full-duplex communication to four lines T/R+, T/R-, RXD+, RXD-.
=='''Communication Link Diagram'''==
'''RS-232 to RS-422 conversion'''
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|[[File:CQR1218-12.jpg |left|380px]]
|[[File:CQR1218-13.jpg |none|400px]]
|[[File:CQR1218-14.jpg |none|380px]]
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'''RS-232 to RS-485 conversion'''
{|-
|[[File:CQR1218-15.jpg |left|380px]]
|[[File:CQR1218-16.jpg |none|400px]]
|[[File:CQR1218-17.jpg |none|380px]]
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