This is the original ‘ABCDE’ membrane section of the keyboard used in Honeywell’s Universal Station. To make a complete keyboard assembly, it must be combined with one of the following keyboard interface boards:

51400771-100 earliest I/F, requires external power supply

51400972-100 low power ABCDE only

51401570-100 low power ABCDE or QWERTY

51401952-100 current interface for ‘Z’ furniture

51401952-200 current interface for classic furniture