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Industrial Quality RS232 to RS422/485 Converts RS232 to/from RS422/485

Industrial Quality RS232 to RS422/485 Converts RS232 to/from RS422/485

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Manufacturer: USBGEAR
Barcode: 729440692025
Part Number: SER-485-PRO
Warranty: ONE YEAR
In Stock: Yes
Ship Weight: 1 lbs.
COLOR Silver
Size: 67×90×27mm

Item Works with Windows ME

Our Price: $79.98
Quantity Discount(s)
6 or more: $76.56
12 or more: $68.34
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User Reviews by
Product Rating: Product User Rating provided by ReviewGear

Pros: Easy installation, Works with Vista and Windows 7.

db-9-serial-male.gif  CONNECTOR TYPE

Product Description

 Converts RS232 <=> RS422/485  

 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 

 DIN-Rail mountable  

Overview: The SER-485 PRO-SI 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. 

The SER-485 PRO-SI is an optical isolated variant of the SER-485 PRO. Further the device is Surge Protected up to 4kV. All options and parameters of SER-485 PRO-SI 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-SI is a NO Jumper type of device. 

With SER-485 PRO-SI 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 

Baudrate adaption in real time 

Line Adjust: Built-in Termination and 
Polarization (BIAS) resistors 

Operation Modes: RS422 with hardware 

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© isolated by relay, controlled via 
software configuration 

RS485 BIAS: BIAS (polarization) optical 
isolated by special drivers, controlled 
via software configuration 

Power and Environment: 

Power requirements: 9-30V DC, 1.3W 

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: 160g 

Ordering Information: 

Product Name: VScom SER-485 PRO 

Packing list: VScom Converter SER-485 PRO-SI

Power Supply

English Documentation 

Optional Accessories: . DIN-Rail mounting 



Important Technical Information:
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 RS232 to RS422/485 Converts RS232 to/from RS422/485

Industrial Quality RS232 to RS422/485 Converts RS232 to/from RS422/485 - Image A
Industrial Quality RS232 to RS422/485 Converts RS232 to/from RS422/485 - Image B