What the order code is
The ABB 1SFA899003R1000 sits in the HMI Keyads & Keyboards line under PLCs & HMIs, filed as a Human Machine Interface accessory for panel-side operator input on ABB control gear. The title string carried on the record describes it as low-voltage switch technology by ASEA BROWN BOVERI, which is the class-level descriptor ABB applies to its compact pilot-device and key-switch family.
Class context and panel-side use
HMI Keyads & Keyboards in this ABB family are the membrane- or mechanical-key input devices that mount through a panel cut-out and terminate to a controller or contactor logic input, giving an operator a labelled way to start, stop, jog, or select modes on a machine line. The 1SFA prefix places this code inside ABB's modular pilot-device range, the same range that supplies the key-operated selector switches and pushbutton keypads commonly fitted to motor control centres and process skids.