Connectors, I/O and Schematics
MultiFlex PCI 1000 Series User's Manual
191
Encoder Feedback Signals
Encoder Inputs
(Phase A+, Phase A-, Phase B+, Phase B-, Z+, Z-)
signal type
:
TTL or Differential driver output
Minimum signal differential (Phase + to Phase -) = 200mV
Maximum range = (-25V to +25V)
notes
:
For single ended encoders connect the
Encoder Reference Output (1.5V)
to all unused
encoder (A-, B-, Z-) inputs
explanation
:
These input signals should be connected to an incremental quadrature encoder for
supplying position feedback information for the Analog Command axes (1 - 4). The plus
(+) and minus (-) signs refer to the two sides of differential inputs. If no index is being
used connect Z+ and Z- to the
Encoder Reference Output
.
Encoder - Reference Output
signal type
:
1.5 VDC (output from resistor voltage divider)
notes
:
explanation:
This output is made available so that any unconnected encoder inputs can be properly
terminated. Most typically this output would be used to terminate the phase '-' inputs of a
single ended encoders.
Default Axis Inputs
i
The default configuration for the controller is for an Analog Command axis and
a Pulse Command axis to share opto isolated inputs and open collector drivers.
The user can change any of the default I/O function assignments by using the
I/O Configuration Panel
, described on pages 10 and 165.
Amp. / Drive Fault Input
signal type
:
Bi-directional optical isolator, 0.25 mA min., 3.0V – 25.0V range
notes
:
explanation:
This input is designed to be connected to the Fault or Error output signal of a servo
amplifier or stepper driver. The state of this signal will appear as a status bit in the axis
status word. By default this input is shared by an Analog command axis and a Pulse
command axis.
The
EnableAmpFault
member of the
MCMotion
structure will enable the axis to be disabled if the Amp /
Drive Fault input is activated. No further motion will occur until the fault signal is deactivated and the axis
has been enabled. The input device is a bi-directional optical isolator. The allowable voltage range for this
signal is
3.0 VDC to 25.0 VDC
. For I/O systems operating outside of this range consult the factory.
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