The D5200 programmer has only 128K RAM, how can it be expanded to 512K?
The D5215 is a memory circuit board that installs on the main board inside the D5200 programmer. This provides the A drive with an additional 384K of RAM which then brings the total A drive compacity to 512K.
Part numbers D5200, D5215
How to interpret the 'Check Device' display on a D1255 or D1260 keypad.
Why does the keypad display "Check Device"?
How to locate which point generated the 'Check Device' display and modify programming to prevent the display.