810RJ-(8-pin RJ45 male to 8-pin RJ45 male). For connecting a single VCM-D1 unit to a computer’s serial port or interconnecting between VCM-D1 controllers for daisy chain application, this 10 ft. interconnect cable is available. The 810RJ connects the RS-232 computer serial port to theRS-232C input of the VCM-D1. One 910RJF included.