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RS232 to RS422/RS485 Converter with Automatic RTS Control US$60.00

CS-428/9AT PRO
RS232 to RS422/RS485 Converter with Automatic RTS Control

The CS-428/9AT converts RS232 signals to RS422 or RS485. It is an efficient solution for applying the advantages of RS422/485 to RS232 devices. It operates without the need to install any software. A switch on the top of the unit allows you to switch between RS422 or RS482.

Under a 1:N communication environment, if more than one device sends data at the same time, there is an electrical collision that leads to an error. In order to prevent this, data I/O control is necessary at certain points. The CS-428/9AT-PRO performs automatic toggling by hardware, so you don't need to worry about writing any code to handle flow control. Similarly, Echo Mode operation, when necessary, is handled by the hardware.

RS232 to RS422/RS485 Converter Features

  • Fully compatible with PC serial COM ports
  • Can operate without power adapter (power applied to DTR signal)
  • Power jack included for external DC power supply (7~12V) if desired
  • Built-in surge protector
  • Auto Toggling by hardware
  • LEDs provide communication status
  • DIP Switch for RS422/485 mode
  • Max. 10 Device Connectivity for RS422 Multi-Drop Mode
  • Max. 32 Device Connectivity for RS485 Mode

Hardware Dimensions and Pinouts

Serial Specifications

  • Mode: Asynchronous serial communication
  • Speed: Up to 115.2 Kbps
  • Distance: Max. 1.2Km @ 115.2Kbps, 24AWG twisted pair cable
  • RS232 Connector: DB9 Female
  • RS422/485 Connector: Terminal Block 5P
  • Signals: TXD, RXD, RTS, CTS, GND for RS232
  • Protection: 15KV Surge Protection for all signals
  • Data Bits: 5, 6, 7, 8
  • Stop Bits: 1, 1.5, 2
  • Parity: None, Even, Odd, Space, Mark
  • RS422 mode: Point-to-Point, Multi-Drop
  • RS485 mode: Echo, Non-Echo
  • RTS Control: Auto Toggling
  • Switch: RS422/485 mode switch

Hardware Specifications

  • Power Input: 7~12V DC
  • Power Consumption: 0.4W (33mA @ 12V)
  • LEDs: Power, TX, RX
  • Dimensions: 74 37 19 mm
  • Weight: 33g
  • Enclosure: Plastic (Blue Color)
  • Approvals: CE Class A, FCC Class A, RoHS

Environmental Specifications

  • Operating Temp.: 0 to 55 degrees C
  • Storage Temp.: -20 to 70 degrees C
  • Humidity: 5 to 95% non-condensing

RS232 to RS422/RS485 Converter Resources

Optional Recommended Products for this Item
Serial Cable, 6ft., DB9 M/F+ US$6.00
Power Supply 3-12V DC, U.S. plug, 6 connection tips+ US$10.00
Power Supply 3-12V DC, US/UK/Euro/AU Plugs, 100-240VAC+ US$10.90

This product was added to our catalog on Tuesday 26 April, 2011.


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