Galil Motion Control DMC-42 0 Series, User Manual

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Analog Inputs
The DMC-42x0 has eight analog inputs configured for the range between -10V and 10V. The inputs are decoded by
a 12-bit A/D decoder giving a voltage resolution of approximately .005V. A 16-bit ADC is available as an option (Ex.
DMC-4220(-16bit)-C012-I000 ). The analog inputs are specified as AN[x] where x is a number 1 thru 8.
AQ settings
The analog inputs can be set to a range of ±10V, ±5V, 0-5V or 0-10V, this allows for increased resolution when the
full ±10V is not required. The inputs can also be set into a differential mode where analog inputs 2,4,6 and 8 can be
set to the negative differential inputs for analog inputs 1,3,5 and 7 respectively. See the AQ command in the
command reference for more information.
Electrical Specifications
Input Impedance (12 and 16 bit) –
Unipolar (0-5V, 0-10V) 42kΩ
Bipolar (±5V, ±10V) 31kΩ
Extended I/O
The DMC-42x0 controller offers 64 extended TTL I/O points which can be configured as inputs or outputs in 8 bit
increments. Configuration is accomplished with command CO – see Extended I/O of the DMC-42x0 Controller
.
The
I/O points are accessed through the 80 pin SCSI connector labeled I/O. See the DMC-42x0 Extended I/O 80 Pin
High Density Connector section in the Appendix for a complete pin out of the Extended I/O.
Electrical Specifications
Inputs
Max Input Voltage 5.25 VDC
Guarantee High Voltage 2.0 VDC
Guarantee Low Voltage 0.8 VDC
Inputs are internally pulled up to 5V through a 4.7kΩ resistor

Outputs
Sink/Source 20mA
External Amplifier Interface
External Stepper Control
The controller provides step and direction (STPn, DIRn) outputs for every axis available on the controller. These
outputs are typically used for interfacing to external stepper drivers, but they can be configured for a PWM output.
See the MT command for more details.
Chapter 3 Connecting Hardware ▫ 33 DMC-42x0 User Manual