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Industrial Quality Optical Isolated RS-232 to RS-422/485 Converter

Industrial Quality Optical Isolated RS-232 to RS-422/485 Converter

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Manufacturer: USBGEAR
Barcode: 729440692032
Part Number: SER-485-PRO-SI
Warranty: ONE YEAR
In Stock: Yes
Ship Weight: 1 lbs.
COLOR Silver
Size: 67×90×27mm

Our Price: $119.98
Quantity Discount(s)
6 or more: $113.56
12 or more: $107.34
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Pros: Easy installation, Works with Vista and Windows 7.

Product Description

Converts RS232 <=> RS422/485

RS422/485 optical isolated

  • RS485 bitrate adaptive ART (Automatic Receive Transmit control), RS422 with Hardware handshake
  • Full Software Configuration, NO Jumpers
  • Quick configuration for standard modes
  • Flexible power 9-30V DC
  • LED indicator for Power and signals
  • Internal Termination and BIAS by software
  • DIN-Rail mountable

Overview: The SER-485 PRO is an adapter to convert bidirectional signals from RS232 to RS422 and RS485 in industrial environments. In RS485 mode the data direction is managed by the bitrate adaptive function of ART (Automatic Receive Transmit control). ART analyzes the data in real-time, and adapts to the setup of the RS232 port. 

All options and parameters of SER-485 PRO operation are configured by software, controlled via an easy-to-use menu structure. This menu is accessed via standard terminal programs. The SER-485 PRO is a NO Jumper type of device. 

With SER-485 PRO often used operation modes are selected by simple DIP switches. The full versatility is controlled by the built-in software configuration menu. The behaviour of RS422 and various options of RS485 are selected by an easy-to-use menu structure. 

The internal termination and BIAS (polarization) resistors allow to prepare the RS485 signals for connection to customers networks. These internal resistors are activated by relays, controlled by the configuration menu. 
There is no need to open the case for configuration.


  • RS232: DTE/DCE selected by DIP 
  • RS485: Automatic Receive Transmit control(ART)
  • Baudrate adaption in real time
  • Line Adjust: Built-in Termination and Polarization (BIAS) resistors
  • Operation Modes: RS422 with hardware handshake
  • RS485 by ART, RTS or DTR
  • RS485 Half- and Full-Duplex
  • Two basic modes selected by DIP switch
  • Cable Length: max. 1200 m


  • Speed: max. 1Mbps
  • max. 250kbps with ART
  • Connector: RS232 1x DB9 female
  • RS485/RS422 1 x DB9 male plus Terminal Block (5 c-clamps

  • Software Configuration
  • Configuration Menu: Various parameters of signal conversion are defined via an easy-
  • to-use menu interface, access is via standard terminal programs (Hyperterminal, miniterm, ...)

  • Operation Modes: RS422

  • RS485 by RTS RS485 by DTR
  • RS485 by ART (Automatic Receive Transmit control)
  • ART options RS485: Transmit/Receive change as quick, average, standard
  • Wiring: RS422 (4-wire)
  • RS485 Full Duplex (4-wire) 
  • RS485 Half Duplex (2-wire) with Echo 
  • RS485 Half Duplex (2-wire) no Echo 
  • Termination: RS422/485 line termination 120© by relay, controlled via software configuration
  • RS485 BIAS: BIAS (polarization) by special drivers, controlled via software configuration


  • Power and Environment: 
  • Power requirements: 9-30V DC, 600mW 
  • Power supply Adapter: 12V DC, 500mA 
  • Dimensions: 67×90×27 mm³ (W×L×H) 
  • Operating Temp: 0°C - 60°C 
  • Storage Temp: -20°C - 85°C 
  • Case: SECC sheet metal (1mm) 
  • Weight: 150g 
Important Technical Information:
RS422/485 optical isolated Converts RS232 <=> RS422/485 12" USB Serial RS-232 Cable for NoteBook/Laptop Users Great FTDI CHip USB to RS-232 Adaptor for GPS/PDA/POS/Modem/Etc.

Industrial Quality Optical Isolated RS-232 to RS-422/485 Converter

Industrial Quality Optical Isolated RS-232 to RS-422/485 Converter  - Image A
Industrial Quality Optical Isolated RS-232 to RS-422/485 Converter  - Image B