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Copyright March 2003, Computer Dynamics, Inc.
All Rights Reserved
MPAC-18 Manual
Installation Guidelines
General:
This section provides general information needed to install the DP027010. The general guidelines
provided include information pertinent to grounding, mounting, and minimum clearances.
This computer system contains static sensitive devices. Proper static device handling procedures must be
followed.
There are no user-serviceable parts in this computer system. Opening or disassembly of the computer
enclosure by persons not certified by CDI will void the warranty.
Installation Sequence Overview:
- Remove computer from shipping carton, retain carton if desired.
- Remove protective plastic from computer
- Remove and store the Windows installation CD and installation key.
- Perform a visual inspection for damage.
- Install bracket, ensure required clearances are maintained
- Install chassis ground strap
- Install power and Ethernet cables
Adequate airflow around the exterior of the unit is important to the interior temperature of the unit. Fans
are used to create airflow through the military computer ensuring that a correct working temperature is
maintained. One of the fans is located on top of the CPU chip and is used to cool the processor. Another
fan is built into the power supply housing and blows air out of the unit. Another fan is located on the rear
chassis cover and blows air out of the cabinet.
Grounding:
This computer system is equipped with a three-wire power cable. When connected to an appropriate AC
power receptacle, this cable grounds the computer chassis. (Signal grounds are isolated from chassis
ground). The AC line plug shall be inserted only in a receptacle provided with a protective earth contact. A
ground stud is provided for optimum grounding, and is required for shipboard installation. Use 12 AWG
stranded wire or larger, a grounding strap (or braid) is highly recommended. The computer chassis
ground stud is ¼ inch diameter, use an appropriate size terminal lug and lockwasher.
Bulkhead Mounting:
This computer system is designed for bulkhead mounting by way of a bracket provided for use with this
computer. Mounting brackets are available in two styles: Pivot and non-pivot. Although each bracket has
the same mounting bolt pattern, the Pivot style bracket requires greater clearance in the front. Refer to
Figures 1 through 5 for mounting bolt patterns and sizes for each bracket. During installation the bracket
is mounted first, then the computer is mounted to the bracket. The bracket is designed to mount with four
3/8”x16 SAE grade 8 bolts, including washer and lock washer. The bolts are tightened to 35 ft/lbs. The
bracket should be mounted flat and level. See Figure 3 for mounting of computer system to the
appropriate bracket.
Once the bracket is mounted, the computer is mounted to the bracket. Use the four provided allen
screws, and combine with a washer and lock washer (not included). Two people are required to mount