Delta Data Systems PMAC PCI, Hardware Reference Manual

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PMAC-PCI Hardware Reference
28 Mating Connectors
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, you should be sure jumpers E85,
E87, E88, E89, and E90 are set up for this circumstance. (The card is not shipped from the factory in this
configuration.)
Flags Power Supply (optional)
Each channel of PMAC has four dedicated digital inputs on the machine connector: +LIMn, -LIMn
(overtravel limits), HMFLn (home flag), and FAULTn (amplifier fault). If the PMAC is ordered with the
Option-1 (8-axis PMAC), these inputs can be kept isolated from other circuits. A power supply from 12
to 24V connected on pin 59 of J7 could be used to power the corresponding opto-isolators. In this case,
jumper E89 must be removed and jumper E90 must connect pins 1-2.
Overtravel Limits and Home Switches
When assigned for the dedicated uses, these signals provide important safety and accuracy functions.
+LIMn and -LIMn are direction-sensitive overtravel limits that must be actively held low (sourcing
current from the pins to ground) to permit motion in their direction. The direction sense of +LIMn and -
LIMn is as follows: +LIMn should be placed at the
negative end of travel, and -LIMn should be placed at
the positive end of travel.
Resistor Pack Configuration: Flag and Digital Inputs Voltage Selection
The PMAC PCI is provided with 6-pin sockets for SIP resistor packs for the input flag sets. Each PMAC
PCI is shipped with no resistor packs installed. If the flag or digital inputs circuits are in the 12V to 24V
range, no resistor pack should be installed in these sockets. For flags or digital inputs at 5V levels, quad
1k

SIP resistor packs (1KSIP6C) should be installed in these sockets. The following table lists the
voltage selection resistor pack sockets for each input device:
Device Resistor Pack Device Resistor Pack
Flags 1 RP77 Flags 5 RP113
Flags 2 RP83 Flags 6 RP119
Flags 3 RP89 Flags 7 RP125
Flags 4 RP94 Flags 8 RP130
Types of Overtravel Limits
PMAC expects a closed-to-ground connection for the limits to not be considered on fault. This
arrangement provides a failsafe condition and therefore it cannot be reconfigured differently in PMAC.
Usually a passive normally close switch is used. If a proximity switch is needed instead, use a 15V
normally closed to ground NPN sinking type sensor.
Jumper E89, E90 and E100 must be set appropriately for the type of sensor used.