DMC-1000 Chapter 3 Connecting Hardware • 27
All motion programs that are currently running are terminated when a transition in the Abort input is
detected. For information on setting the Off-On-Error function, see the Command Reference, OE.
NOTE: The error LED does not light up when the Abort Input is active.
Uncommitted Digital Inputs
The DMC-1000 has 8 uncommitted opto-isolated inputs. These inputs are specified as INx where x
specifies the input number, 1 through 24. These inputs allow the user to monitor events external to the
controller. For example, the user may wish to have the x-axis motor move 1000 counts in the positive
direction when the logic state of IN1 goes high.
1080
Controllers with 5 or more axes have 16 opto-isolated inputs and 8 TTL level inputs. .
For controllers with more than 4 axes, the inputs 9-16 and the limit switch inputs for the additional
axes are accessed through the second 100-pin connector.
IN9-IN16 INCOM
FLE,RLE,HOMEE
FLF,RLF,HOMEF
FLG,RLG,HOMEG
FLH,RLH,HOMEH
LSCOM
A logic zero is generated when at least 1mA of current flows from the common to the input. A
positive voltage (with respect to the input) must be supplied at the common. This can be accomplished
by connecting a voltage in the range of +5V to +28V into INCOM of the input circuitry from a
separate power supply.
Wiring the Optoisolated Inputs
The default state of the controller configures all inputs to be interpreted as a logic one without any
connection. The inputs must be brought low to be interpreted as a zero. With regard to limit switches,
a limit switch is considered to be activated when the input is brought low (or a switch is closed to
ground). Some inputs can be configured to be active when the input is high - see section Changing
Optoisolated Inputs from Active High to Active Low.
The optoisolated inputs are organized into groups. For example, the general inputs, IN1-IN8, and the
ABORT input are one group. Each group has a common signal which supplies current for the inputs
in the group. In order to use an input, the associated common signal must be connected to voltage
between +5 and +28 volts, see discussion below.
The optoisolated inputs are connected in the following groups (these inputs are accessed through the
26-pin J5 header).
Group Common Signal
IN1-IN8, ABORT INCOM
FLX,RLX,HOMEX
FLY,RLY,HOMEY
FLZ,RLZ,HOMEZ
FLW,RLW,HOMEW
LSCOM
1080
For controllers with more than 4 axes, the inputs 9-16 and the limit switch inputs for the additional axes
are accessed through a separate connector, JD5.
Group Common Signal
IN9-IN16 INCOM
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