User's Manual

Turbo PMAC PCI HRM
Machine Connections 29
MACHINE CONNECTIONS
Typically, the user connections are made to a terminal block that is attached to the JMACH connector by a
flat cable (Acc-8D or 8P). The pinout numbers on the terminal block are the same as those on the JMACH
connector. The possible choices for breakout boards are the following:
Board Mounting
Breakout
Style
Breakout
Connector
Notes
Acc-8P DIN – Rail Monolithic Terminal Block Simple Phoenix contact board
Acc-8D DIN – Rail Monolithic Terminal Block Headers for connection to option boards
Acc-8DCE DIN – Rail Modular D-sub connector
Fully shielded for easy CE mark
compliance
Acc-8DP Panel Modular D-sub connector Used in the PC-pack product
Mounting
The PMAC PCI can be mounted in one of two ways: in the PCI bus, or using standoffs.
• PCI bus: To mount in the PCI bus, simply insert the P1 card-edge connector into PCI socket. If there is
a standard PC-style housing, a bracket at the end of the PMAC PCI board can be used to screw into the
housing to hold the board down firmly.
• Standoffs: At each of the 4 corners of the PMAC PCI board, there are mounting holes that can be used
to mount the board on standoffs.
Power Supplies
Digital Power Supply
2A @ +5V (+/-5%) (10 W)
(Eight-channel configuration, with a typical load of encoders)
• If the PMAC is installed in the internal bus, the host computer provides the 5 Volts power supply.
• With the board plugged into the bus, it will 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 can be measured between pins 1 and 3 of the terminal block.
• In a stand-alone configuration, when PMAC is not plugged in a computer bus, it will need an external
five-volt supply to power its digital circuits. The +5V line from the supply should be connected to pin 1
or 2 of the JMACH connector (usually through the terminal block), and the digital ground to pin 3 or 4.
ACC-1x provides different options for the 5 Volts power supply.
Analog Power Supply
0.3A @ +12 to +15V (4.5W)
0.25A @ -12 to -15V (3.8W)
(Eight-channel configuration)
The analog output circuitry on PMAC is optically isolated from the digital computation circuitry, and so
requires a separate power supply. This is brought in on the JMACH connector. The positive supply – +12
to +15V – should be brought in on the A+15V line on pin 59. The negative supply – -12 to -15V – should
be brought in on the A-15V line on pin 60. The analog common should be brought in on the AGND line on
pin 58.
Typically, this supply can come from the servo amplifier; many commercial amplifiers provide such a
supply. If this is not the case, an external supply may be used. ACC-2x provides different options for the ±
15V power supply. Even with an external supply, the AGND line should be tied to the amplifier common. It
is possible to get the power for the analog circuits from the bus, but doing so defeats optical isolation. In
this case, no new connections need to be made. However, be sure that jumpers E85, E87, E88, E89, and
E90 are set up for this circumstance. (The card is not shipped from the factory in this configuration.)