Infratec™ 1241 Grain Analyzer
2:4 Service Manual 1001 5015 / Rev. 4
2.2.1 PC-Module
The PC-module is a PC104 embedded hardware platform with QNX real-time
operating system (RTOS). PC104 is a popular standardized form-factor for small
computing modules typically used in embedded system. A system composed of PC/
104 modules is often referred to as a "stack".
The PC module "stack" assembly consists of:
• Mounting plate
• Processor board, that acts as a controller for the peripheral components
• DSP board, that acts as an extension Processor board and is also used as an I/O
system
Communication between the PC-module and the instrument modules is routed via
the DSP board I
2
C bus, which is a simple standard 2-wire connection where the DSP
acts as the master device.
NOTE: Due to the QNX software platform, USB plug & play is not
supported. An USB-floppy drive solution may however work.
Fig. 2:2 PC-Module
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