Appendices
Electrical Specifications
Servo Control
ACMD Amplifier Command: +/-10 volt analog signal. Resolution 16-bit DAC or
0.0003 volts. 3 mA maximum
A+,A-,B+,B-,IDX+,IDX- Encoder and
Auxiliary
TTL compatible, but can accept up to +/-12 volts.
Quadrature phase on CHA, CHB. Can accept single-
ended (A+,B+ only) or differential (A+,A-,B+,B-).
Maximum A, B edge rate: 12 MHz. Minimum IDX pulse
width: 80 nsec.
Stepper Control
Pulse TTL (0-5 volts) level at 50% duty cycle. 3,000,000
pulses/sec maximum frequency
Direction TTL (0-5 volts)
Input / Output
Limit Switch Inputs, Home Inputs.
IN[1] thru IN[8] Uncommitted Inputs and
Abort Input
IN[9] thru IN[16] Uncommitted Inputs
(DMC-2x50 through DMC-2x80 only)
2.2K ohm in series with opto-isolator. Active high or low
requires at least 1mA to activate. Once activated, the
input requires the current to go below 0.5ma. All Limit
Switch and Home inputs use one common voltage
(LSCOM) which can accept up to 24 volts. Voltages
above 24 volts require an additional resistor.
≥ 1 mA = ON; ≤ 0.5 mA = OFF
AN[1] thru AN[8] Analog Inputs: Standard configuration is +/-10 volts. 12-Bit Analog-to-
Digital converter. 16-bit optional.
OUT[1] thru OUT[8] Outputs: TTL
OUT[9] thru OUT[16] Outputs:
(DMC-2x50 through DMC-2x80 only)
TTL
IN[81], IN[82] Auxiliary Encoder Inputs for A (X) axis. Line Receiver
Inputs - accepts differential or single ended voltages with
voltage range of +/- 12 volts.
DMC-2X00 Appendices y 191
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