PMAC2A-PC/104
Machine Connections
14
Dry Contact
Flag_1_2_V
1
7
JMACH2
PLIM+
5 – 24 VDC
Power Supply
+
-
5-24 Volts proximity
Flag_1_2_V
1
7
JMACH2
PLIM+
5 – 24 VDC
Power Supply
+
-
DAC Outputs Power Supply
0.3A @ +12 to +15V (4.5W)
0.25A @ -12 to -15V (3.8W)
(Eight-channel configuration)
•
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 automatically pull ±12V power from the
bus 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 stand-alone configuration, when PMAC is not plugged in a computer bus, it will need
an external ±12 Volts supply only when the digital-to-analog converter (DAC) outputs are
used
. The ±12V lines from the supply, including the ground reference, can be brought in either
from the TB1 terminal block or from the JMACH1 connector.
Flags Power Supply
Each channel of PMAC has five dedicated digital inputs on the machine connector: PLIMn, MLIMn
(overtravel limits), HOMEn (home flag), FAULTn (amplifier fault), and USERn. A power supply from 5
to 24 Volts must be used to power the circuits related to these inputs. This power supply can be the same
used to power PMAC and can be connected from the TB1 terminal block or the JMACH1 connector.
Over-travel Limits and Home Switches
When assigned for the dedicated uses, these signals provide important safety and accuracy functions.
PLIMn and MLIMn are direction-sensitive over-travel limits that must conduct current to permit motion
in that direction. If no over-travel switches will be connected to a particular motor this feature must be
disabled in the software setup through the PMAC Ix25 variable.
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. Usually, a passive normally close switch is used. If a
proximity switch is needed instead, use a 5 to 24 Volts normally closed to ground NPN sinking type
sensor.
Home switches
While normally closed-to-ground switches are required for the overtravel limits inputs, the home switches
could be either normally close or normally open types. The polarity is determined by the home sequence
Содержание PMAC2A-PC/104
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Страница 14: ...PMAC2A PC 104 Base Board Hardware Setup 8 ...
Страница 34: ...PMAC2A PC 104 PMAC2A PC 104 Software Setup 28 ...
Страница 41: ...PMAC2A PC 104 ACC 1P Hardware Reference Summary 35 ...
Страница 51: ...PMAC2A PC 104 Base Board E Point Jumper Descriptions 45 ...
Страница 55: ...PMAC2A PC 104 Acc 1P E Point Jumper Descriptions 49 ...
Страница 68: ...PMAC2A PC 104 Acc 1P Connector Pinouts 62 ...