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VScom SER-485 PRO-SI
(Replaced by SER-485 ISO and SER-485 Mini ISO)

bidirectional Converter RS232 to 422/485, optical isolated

VScom SER-485 PRO-SI
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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.

  • 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

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Hardware Specifications
DTE/DCE selected by DIP
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
max. 1200 m
max. 1Mbps
max. 250kbps with ART
RS232 1x DB9 female
RS485/RS422 1 x DB9 male plus Terminal Block (5 c-clamps)
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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
RS485 by RTS
RS485 by DTR
RS485 by ART (Automatic Receive Transmit control)
  ART options RS485
Transmit/Receive change as quick, average, standard
RS422 (4-wire)
RS485 Full Duplex (4-wire)
RS485 Half Duplex (2-wire) with Echo
RS485 Half Duplex (2-wire) no Echo
RS422/485 line termination 120Ω isolated by relay, controlled via software configuration
  RS485 BIAS
BIAS (polarization) optical isolated by special drivers, controlled via software configuration
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Power and Environment
  Power requirements
9-30V DC, 1.3W
  Power supply Adapter
12V DC, 500mA
67×90×27 mm³ (W×L×H)
  Operating Temp
0°C - 60°C
  Storage Temp
-20°C - 85°C
SECC sheet metal (1mm)
160 g
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Ordering Information
VScom SER-485 PRO-SI
VScom SER-485 PRO
  Packing list
VScom Converter SER-485 PRO-SI
Power Supply
English Documentation
DIN-Rail mounting clamp
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You can purchase VSCOM's products easily from a wide variety of leading technology distributors or partners. Please call us or contact us by mail to find the best ordering method for your needs.
  * Specifications are subject to change without notice.
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