Marquardt Military Keyboard 7069.3111

Marquardt Military Keyboard 7069.3111

Manufacturer	Marquardt
Layouts	Slightly modified ISO
Keyswitches	Marquardt Series 6184<ref name="gh-thread-2" />
Switch mount	Plate mounted
Interface	PS/2 for keys, RS232 (1200 Baud) for trackball over a DA-15 D-SUB connector<ref name="gh-thread"/>
Rollover	NKRO
Weight	3.38 kg

The Marquardt 7069.3111 is fullsize, plate-mounted keyboard manufactured by Marquardt for the Deutsche Bundeswehr.

The keyboard was part of the HEROS-System (Heeresführungs - Informationssystem für die Rechnergestützte Operationsführung in Stäben) and consisted out of a Digital Equipment DECpc433 mounted inside a EDKA aluminium box. The keyboard itself was attached inside the box top.

The keycaps are Cherry MX-compatible double shots.

The housing is made out of aluminium, with the bottom plate being 2mm and the top being 6mm thick.

Pinouts

Even though equipped with a 15 Pin D-Sub connector the keyboard uses ordinary PS2 signalling, therefore it can easily be used on modern PCs. The pin out is as follows<ref name="gh-thread"/>:

PCB connector	Signal	D-SUB	Cable colour
Pin 1	+5V	Pin 15	Brown
Pin 2	GROUND	Pin 7, 11, 14	White
Pin 3	KDB_CLK	Pin 13	White
Pin 4	KDB_DATA	Pin 12	Green
Pin 5	RS232-MOUSE	Pin 2	White
Pin 6	Unknown	Pin 4	Yellow

The serial signal for the trackball operates at a speed of 1200 Baud. The trackball can be put into operation with the following addition to xorg.conf<ref name="gh-thread"/>:

,----[ xorg.conf ]
| Section "InputDevice"
|    Identifier  "heros ball"
|    Driver      "mouse"
|    Option      "CorePointer"
|    Option      "Sensitivity" "2.0"
|    Option      "Device"      "/dev/ttyS0"
|    Option      "Protocol"    "mouse systems"
| EndSection
`----

Gallery

• 
  Top view
• 
  Top view
• 
  Numeric keypad
• 
  Trackball and arrow keys
• 
  Keys
• 
  Modifier
• 
  Label
• 
  Bottom plate
• 
  Bottom plate removed
• 
  Metal sealing at housing
• 
  Marquardt label on PCB
• 
  Trackball with ball bearings
• 
  Cable attachment inside housing
• 
  Housing with PCB removed
• 
  Thickness of housing
• 
  Switch at 3 key, usage unknown
• 
  PCB top view
• 
  PCB top view
• 
  PCB top view

References

<references> <ref name="gh-thread">Geekhack - Rugged military keyboard by Marquardt</ref> <ref name="gh-thread-2">Geekhack - What did you get in the mail today? (page 145, post 7233)</ref> </references>