Overview Of Inputs - Galil Motion Control DMC-21 5 Series User Manual

Overview of Inputs

General Purpose Digital Inputs
The DMC-21x5 inputs are rated for 5V. The amount of inputs available on the DMC-21x5 depends on the number
of axes on the controller. For example, 1-4 axis models come with a single bank of 8 inputs, Bank 0 (DI[8:1]). 5-8
axis models come with an additional bank of 8 inputs, Bank 1 (DI[16:9]), for a total of 16 inputs. These inputs can
be read individually by using the
uncommitted and can allow the user to create conditional statements related to events external to the controller.
For example, the user may wish to have the A axis motor move 1000 counts in the positive direction when the logic
state of DI1 goes high.
The digital inputs can be used as high speed position latch inputs, see High Speed Position Capture (The Latch
Function) for more information.
Electrical Specifications
Maximum Voltage
Minimum Voltage
Inputs are pulled up to 5V through a 4.7kΩ resistor
Main Encoder Inputs
The main encoder inputs can be configured for quadrature (default) or pulse and direction inputs. This
configuration is set through the
connectors and are labeled MA+, MA-, MB+, MB-. The '-' (negative) inputs are the differential inputs to the
encoder inputs; if the encoder is a single ended 5V encoder, then the negative input should be left floating. If the
encoder is a single ended and outputs a 0-12V signal then the negative input should be tied to the 5V line on the
DMC-21x5.
When the encoders are setup as step and direction inputs the MA channel will be the step or pulse input, and the
MB channel will be the direction input.
Electrical Specifications
Maximum Voltage
Minimum Voltage
Maximum Frequency (Quadrature)
'+' inputs are internally pulled-up to 5V through a 4.7 kΩ resistor
'-' inputs are internally biased to ~1.3V
Auxiliary Encoder Inputs
The auxiliary encoder inputs can be used for general use. For each axis, the controller has one auxiliary encoder
and each auxiliary encoder consists of two inputs, channel A and channel B. The auxiliary encoder inputs are
mapped to the inputs 81-96. The Aux encoder inputs are not available for any axis that is configured for step and
direction outputs (stepper).
Chapter 3 Connecting Hardware ▫ 19
operand where n specifies the input number. These inputs are
@IN[n]
CE command. The encoder connections are found on the HD D-sub Encoder
pulled up to 5V through a 7.1 kΩ resistor
pulled down to GND through a 2.5 kΩ resistor
5 V
DC
0 V
DC
12 V
DC
-12 V
DC
15 MHz
DMC-21x5 User Manual 1.0a1