Designed and manufactured by Allen Bradley, the 1770-KF2 is a communication interface module that can be a suitable stand-in for the 1771-KD communication controller module. It also includes around four conversation ports, along with the Data Highway port that features a 15 pin male Electronic Industries Association D connector, and the Peer Communication port that also features a 15 pin male Electronic Industries Association D connector. In addition, the Data Highway Monitor port with a 9 pin female Electronic Industries Association D connector, as well as the asynchronous RS422 A or RS232 C ports that feature 25 pin male Electronic Industries Association D connectors are included in this Allen-Bradley communication interface module. 

Furthermore, the Allen Bradley 1770-KF2 interface module incorporates three cabling classes that include the Data Highway (with the Cat. No. 1770-CD), asynchronous RS422 A, and the Asynchronous RS232 C cabling classes. Moreover, the communication rates in this communication interface module are 57,600 bits-per-second for Data Highway, 57,600 bits-per-second for Peer Communication Link, and around 110 all the way up to 9,600 bits-per-second for the asynchronous switch. In addition to that, the ambient operating temperature for this module to safely operate is between 32 and 113 degrees Fahrenheit (which is 0 to 45 degrees in Celsius). Moreover, this module has an ambient temperature ranging from minus 40 - 185 degrees Fahrenheit (which converts to minus 40 - 85 degrees in Celsius). Furthermore, this Allen-Bradley interface module has an environmental humidity range from 10 to no more than 80 percent non-condensing. This interface module by Allen-Bradley incorporates the following dimensions: 10 x 10 x 3 inches.