Communication Converters

USB Communication Converter

  • Converter required to connect between the loader communication port (or RS-485/422A serial communication) and the USB port of the PC.
  • NEW
  • Communication
  • Main features
  • Main specification
  • External dimensions
  • Models

Main features

USB Communication Converter


  • Serial communication converter between USB and RKC loader communication or USB and RS-485/RS-422A.

 Supported OS: Windows 7,  Windows 10, Windows 11
 Connectable models: Various  control devices from RKC


Configuration data management software (PROTEM2) is available.

Main specification

USB communication function

  • Interface: Based on USB Ver. 2.0
  • Communication speed: Full speed (12 Mbps)
  • Connection: Connected by universal USB cable (Mini-B connector)
  • Power source method: Bus power (The power is supplied from the USB port on the personal computer side)
  • Supported  OS:

Windows 7(32bit and 64bit editions)
Windows 10(32bit and 64bit editions)
Windows 11


Serial communication function

  • Interface:

Based on RS-485, EIA standard
Based on RS-422A, EIA standard

  • Communication speed: 2400 bps, 4800 bps, 9600 bps, 19200 bps, 38400 bps, 57600 bps, 115200 bps
  • Protocol: Protocol depends on application of the personal computer side
  • Number of connecting controllers: Maximum 31 controllers (RS-485/RS-422A)
  • Termination resistor: Built-in termination resistor (120Ω)


General specifications

  • Power supply voltage: 5 VDC±5% (Supplied by USB bus cable)
    *USB powered function is only available while using RKC Loader Communication without USB hubs (Low power type)
  • Current consumption:

200 mA max. (While using RKC Loader Communication with USB powered function)
100 mA max. (While using Serial Communication)

  • Allowable ambient temperature range: -10 to +55 ℃
  • Weight: Approx. 50g (Instrument only)

External dimensions



Cables for RKC loader communication (Cable length 1.5m)


<Compatible with FB Series, RB Series, RZ Sereis, SRZ Series, SB1, AG500, PG500, COM-ME Series, COM-ML Series, THV-10, THV-40>


<Compatible with PF900, PF901>


<Compatible with FZ Series, GZ Series, PZ Series>


COM-KG application examples (USB cable is included as standard accessory)