UMAC-CPCI Turbo CPU Board Hardware Reference Manual
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Accessories
ACC-24C2 PWM Axis Board
The ACC-24C2 PWM axis board provides the interface circuitry for 4 axes of purely digital control in a
single slot, with direct PWM outputs, serial ADC inputs, quadrature encoder inputs, and input/output
flags. Because of pin limitations on the J2 field wiring connector, signals that are differential on other
ACC-24x2 boards are single-ended here. To take these signals any significant distance, differential line
drivers and receivers are required on a distribution board.
ACC-24C2A Analog Axis Board
The ACC-24C2A analog axis board provides the
interface circuitry for 4 axes of control in a single slot,
with analog interface to the servo drives. It also has
one pulse-and-direction output per axis for stepper
drives, or stepper-replacement servo drives. One 18-bit
D/A converter comes standard for each axis; Option 1
provides a second D/A converter per axis, which can be
used as part of a “sine-wave” control scheme, or for
non-servo use. Option 2 provides eight 12-bit A/D
converters.
ACC-51C Analog Encoder Interpolator Board
The ACC-51C provides the circuitry for the high-resolution interpolation of 2 or 4 analog sine/cosine
encoders, yielding 4096 states per line of the encoder. The board comes standard with two channels of
interface; Option 1 provides two additional channels.
