146 • Appendices DMC-1500
Appendices
Electrical Specifications
Servo Control
ACMD Amplifier
Command:
+/-10 Volts analog signal. Resolution 16-bit DAC or .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: 8 MHz. Minimum IDX pulse width:
120 nsec.
Stepper Control
Pulse TTL (0-5 Volts) level at 50% duty cycle. 2,000,000
pulses/sec maximum frequency
Direction TTL (0-5 Volts)
Input/Output
Uncommitted Inputs, Limits, Home Abort
Inputs:
2.2K ohm in series with optoisolator. Requires at least 1 mA
to activate. Can accept up to 28 Volts without additional
series resistor. Above 28 Volts requires additional resistor.
AN[1] thru AN[7] Analog Inputs: Standard configuration is +/-10 Volt. 12-Bit Analog-to-
Digital converter.
OUT[1] thru OUT[8] Outputs: TTL.
OUT[9] through OUT [16] Outputs TTL (only available on controllers with 4 or more axes)
IN[17] through IN[24] Inputs TTL (only available on controllers with 4 or more axes)
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