Woodward AtlasPC, Hardware Manual

Page: 32 / 134

AtlasPC Digital Control, Vol. I Manual 85586V1
24 Woodward
Features
•
5 ms update rate
•
On-board processor for automatic calibration of the I/O channels
•
Analog inputs have 14 bit resolution
•
Analog outputs have 12 bit resolution
Physical
The AtlasPC boards connect to each other through either the PC/104 bus
connectors or the power bus connectors. All of the boards are held together and
to the chassis, by screws. The SmartCore board is the size of two analog boards.
VIS-001
00-05-31 kdw
RAM
memory
watchdog
32.768 kHz
Crystal
16-bit Sigma-Delta
A/D Converter
MC68332
Microcontroller
Discrete
Input
buffer
Non-volatile
application sector
flash memory
Non-volatile boot
sector flash
memory
Analog Output
Circuitry
4-20mA Outputs (4)
RS-232, RS-422 or
RS-485 comm port
Discrete Inputs(16)
EEPROM non-
volatile memory
Analog Inputs(4)
0-5Vdc/4-20mAdc
MC68302
Communications
Microcontroller
RS-232 comm port
RS-232, RS-422 or
RS-485 comm port
Speed Sensing
Circuitry
Speed Sensor
Inputs (2)
Real-Time
Clock
PC/104 Bus
Interface
Power Bus
Interface
PC/104 Signals
Power Bus Signals
Figure 5-2. SmartCore Board Block Diagram