Link: ERC Version 4 RS232

USB rotator control right from your PC screen with ERC Version 4 USB.  Point and click with the mouse with either supplied ERC software or interfaced via many popular transceiver control and logging programs. 

ERC Version 4 RS232 feature list:

  • USB connected point-and-click control of almost any ham rotator, HyGain/CDE, all Yaesu, Create, Daiwa, ProSisTel - see the complete supported rotator list at the bottom of this page.
  • Software included and/or use with popular logging/control programs
  • Programmable stops, offsets, overlap support, speed function   
  • PC board mounts inside rotator control box   
  • $99 as a kit.  No assembled version, kit only.


Included with ERC Version 4 RS232:

  • Kit includes all components to build the ERC Version 4 RS232 and to install it inside rotor controller

  • RS232 cable and 12VDC power cable

  • Instructions how to build and use ERC Version 4 RS232.

  • Installation guide for more than 90 rotators.  

  • Software Service Tool (Windows XP/Vista/7/8/10 32 and 64 bit) for configuration and calibration.

  • Rotor Control Software (Windows XP/Vista/7/8/10 32 and 64 bit).


  • PC board size : 3.15 x 2.4 inches (80 x 61 mm)

  • DC supply voltage : 11-15 VDC, max 110mA, protected against wrong polarization

  • Operating temperature : 0 to 70° C

  • Software driven calibration

  • Full support for rotators with overlap up to 180°

  • Extended calibration every 30° to compensate non-linearities of the rotator feedback voltage

  • Security stop, if the rotator does not move

  • Relay circuits:

    • CW/CCW : each 2xON/OFF (DPDT) max 50VAC/3A or 30VDC/2.5A

    • AUX : 1xON (SPST) max. 250VAC at 3A

  • Communication port:  Serial

  • ERC is compatible to a subset of the following protocols:

    • Hygain DCU-1 with extension for position feedback

    • Yaesu GS232A

    • Yaesu GS232B

How it works:  the completed PC board is installed inside the rotor control box.   Connect 12VDC to the ERC V4 RS232 unit with the included power cable and the board to your shack computer with the included cable.  Install the software calibration tool to automatically calibrate and configure your rotator.  Open the ERC software, and start turning the rotator!  Stand-alone software use, or ERC V4 RS232 can be interfaced with many popular logging and control programs.



Standard screen graphic for ERC control software.  To turn the rotator, mouse over any spot on the circular azimuth indicator, click, and the rotator will start turning.  For small adjustments, clicking on the << or >> button moves the rotator the same way physically pushing the buttons on the front of the rotator control box would.  A specific target point can be typed into the box next to the GO 1 button.  In the example shown, 338 degrees is the target - click on GO 1 and the rotator will move to 338.  Rotation can be canceled at any time by clicking STOP 1.  A parking position for the rotator can be programmed into the PARK 1 box.  Very easy to use!

Click here to read the instruction guide


Click here to read the supported rotator control list


Click here to read the list of supported third-party logging and control software


Click here to read eham.net reviews of ERC products



ERC Version 4 RS232

ERC Version 4 RS232 KIT with components, PC board, cable, complete build and installation instructions, CD with calibration and operation software.