Delta Tau PMAC2A-PC/104 Instrukcja Obsługi Pobierz pdf (Strona 19)

PMAC2A-PC104 Hardware Manual

Machine Connections 13

Baseboard mounted at

the bottom of the stack

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:

• 34-Pin IDC header to terminal block breakouts (Phoenix part number 2281063) Delta Tau part

number 100-FLKM34-000

• 50-Pin IDC header to terminal block breakouts (Phoenix part number 2281089) Delta Tau part

number 100-FLKM50-000

Mounting

The PMAC2A-PC/104 is always installed using standoffs, either when it is

stack to a PC/104 computer or used as a stand-alone controller. At each of

the four corners of the PMAC2A-PC/104 board, there are mounting holes

that can be used to mount the board on standoffs.

The PMAC2A-PC/104 baseboard is placed always at the bottom of the

stack. The order of the ACC-1P or ACC-2P with respect to the baseboard

does not matter.

Power Supplies

Digital Power Supply

3A @ +5V (±5%) (15 W)

(Eight-channel configuration, with a typical load of encoders)

The PMAC2A-PC/104, the ACC-1P and the ACC-2P each require a 1A @ 5VDC power supply for

operation. Therefore, a 3A @ 5VDC power supply is recommended for a PMAC2A-PC/104 board stack

with ACC-1P and ACC-2P boards.

• 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 stand-alone configuration, when PMAC is not plugged in a computer bus, it will need an external

5V supply to power its digital circuits. The 5V power supply can be brought in either from the TB1

terminal block or from the JMACH1 connector.

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