
PMAC2A PC104 Hardware Reference Manual
MACHINE CONNECTIONS
Typically, the user connections are actually made to terminal blocks that are attached to the JMACH connectors by a flat cable. The following are the terminal blocks recommended for connections:
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Mounting
The PMAC2A PC/104 is always installed either using standoffs, when it is stacked to a PC/104 computer or used as a
The PMAC2A PC/104 baseboard is placed always at the bottom of the stack. The order of the
Power Supplies
Baseboard mounted at the bottom of the stack
Digital Power Supply
3A @ +5V (±5%) (15 W)
The PMAC2A PC/104, the
•The host computer provides the 5 Volts power supply in the case PMAC is installed in the PC/104 bus. With the board stack into the bus, it will automatically pull +5V power from the bus and it cannot be disconnected. In this case, there must be no external +5V supply, or the two supplies will "fight" each other, possibly causing damage. This voltage could be measured on the TB1 terminal block or the JMACH1 connector.
•In a
DAC Outputs Power Supply
0.3A @ +12 to +15V (4.5W)
0.25A @
•The host computer provides the ±12 Volts power supply in the case PMAC is installed in the PC/104 bus. With the board stack into the bus, it will pull ±12V power from the bus automatically and it cannot be disconnected. In this case, there must be no external ±12V supply, or the two supplies will fight each other, possibly causing damage. This voltage could be measured on the TB1 terminal block.
•In a
Machine Connections | 13 |