The Model 255 Indicator has great expandability with the
unique optional BUS system for simplified "snap-in" installation
of additional serial, analog, and relay modules. 3 assignable
function keys for Printing, Unit Switching, Counting, Manual
Hold, Peak Hold, and Totalizing (Accumulating). 16 Button
keypad, and 8 Setpoints. The LCD display allows for
4 alphanumeric lines of data.