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DMC-1700/1800 Appendices • 199
Appendices
Electrical Specifications
Servo Control
ACMD Amplifier Command: +/-10 Volts analog signal. Resolution 16-
b
it 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: 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
Uncommitted Inputs, Limits, Home, Abort
Inputs:
2.2K ohm in series with optoisolator. Active high or low
requires at least 2mA to activate. Can accept up to 28
Volts without additional series resistor. Above 28 Volts
requires additional resistor.
AN[1] thru AN[8] Analog Inputs: Standard configuration is +/-10 Volt. 12-Bit Analog-to-
Digital converter. 16-bit optional.
OUT[1] thru OUT[8] Outputs: TTL.
OUT[9] thru OUT[16] TTL (for DMC-1X50 thru DMC-1X80)
IN[17] thru IN[24] TTL (for DMC-1X50 thru DMC-1X80)
Note: The part number for the 100-pin connector is #2-178238-9 from AMP.