Convert an RS-422 or RS-485 DB 9 male serial connector to a terminal block connector The DB92422 DB 9 to Terminal Block adapter converts an RS-422 or RS-485 DB 9 male serial connector to a terminal block connector. The 5-pin 3.5mm Terminal Block connector supports screw-type wiring to meet the standard for industrial wiring applications. Backed by Lifetime warranty. The StarTech.com Advantage - Converts a DB9 male RS422/485 port to a 5 pin terminal block - Supports four wire RS422, RS485, and two wire RS485 modes - Supports 3.5mm 5 pin terminal blocks