About the DS3800HDDD
The DS3800HDDD is a printed circuit board (PCB) manufactured by GE as part of their Mark IV Speedtronic series. The Mark IV was designed to control gas and steam turbine systems with minimal downtime due to electronics failure.
The DS3800HDDD is designed as a Diagnostic display board and has two distinct parts: the PCB and the corresponding connecting panel.
The connecting panel is connected to the DS3800HDDD board by four flathead screws with spacers. These are located on the top and bottom edges of the panel, offset from the corners. The panel has been broken into three separate section by two vertical lines. The first section is composed of four warning lights, three amber and one red, and one switch; these are labeled, top to bottom: drive ok, data link active, ready to run, fault, and reset. The second section is comprised of three red LED strips. The first strip has twenty LEDs, the second and third have ten each. These are numbered and labeled in pairs as follows:
First display labeled "Motor Faults":
1. Overload
2.Overcurrent
3. Overspeed
4. Overvolts
5. Tach loss
6. Field Loss
7. Field Overcurrent
8. External fault
9. PMM fault
10. Software trip
Second display labeled "Converter Faults":
11. Overload
12. Overcurrent
13. AC Fault
14. DC Fault
15. SCR/Fuse
Third display labeled "Alarms":
16. Motor Overload
17. Connector Overload
18. PMM Overload
19. Memory Overload
20. Ground Fault
The bottom of this section is inscribed with the code 2298298971.
The third section also has three LED strips (amber,) numbered in pairs of two. The first strip has ten LEDs, the second twenty, and the third ten. These are numbered and labeled as follows:
First display labeled "Drive Status":
21. Control ready
22. Field on
23. M Closed
24. On Request
25. On
Second display labeled "Reference Selection":
26. Run Ref
27. Current Ref
28. Forward Ref
29. Reverse Ref
30. Speed 1 Ref
31. Speed 2 Ref
32. Speed 3 Ref
33. Jog Fwd
34. Jog Rev
35. Creep/slow
The last panel is labeled "Status":
36. Zero Speed
37. Reset Request
38. Tuneup mode
39. Emergency stop
40. Alternate Display
The interior board of the DS3800HDDD is factory-drilled to accept the panel screws mentioned above. It is also drilled at all four corners for mounting options. All LEDs mentioned above are connected to the board in a fashion to line up with the display above.
The DS3800HDDD has two lines of ceramic-covered metal film resistors running parallel to the top and the bottom of the board, as well as others placed throughout the board. There are multiple integrated circuits.
The lower edge of the DS3800HDDD is marked from edge to edge with the letters A through J. There is a multi-pin connector located on its left edge, next to two thumbwheel potentiometers labeled M58 and L58.
Technical support for the DS3800HDDD and other Mark IV components was originally provided by GE. Please refer to GE data sheets and manuals for installation guidelines.
