2-2
Selecting Other System Components
Analog and Digital Interfaces
All OMNIDRIVEs allow the user to select one of the following analog or digital command interfaces:
•
±10 Volt analog interface – position, velocity or torque control
•
Presets (from one to eight binary inputs) – torque or velocity control
•
Quadrature encoder digital interface – electronic gearing position follower
•
Step/Direction digital interface – position control
•
CW/CCW (step up/step down) interface – position control
•
Indexing (available only on ODM-010i, ODM-020i, ODM-030i, ODM-075i and
ODM- 150i).
Encoder Control
A single, motor mounted encoder provides complete commutation information and velocity feedback.
Low velocity regulation is enhanced by the use of a 8000PPR (pulses per revolution) incremental encoder.
Encoder Output
A selectable output allows the encoder resolution to be specified for maximum performance without
adding circuitry. Outputs are differential line drivers capable of dividing the motor encoder signal, PPR,
by a factor of 1, 2, 4 or 8.
Digital I/O
Digital I/O channels allow the user to program the drive to fit the specific application. Power for the I/O
must be supplied by an 12-24 VDC external I/O power supply. Selections include:
•
Four selectable (INPUT1, INPUT2, INPUT3 and FAULT RESET), current sinking, opti-
cally isolated, active high inputs.
•
One dedicated, control (ENABLE), current sinking, optically isolated, active high input.
•
Two selectable, current sourcing, optically isolated and short circuit protected, active high
outputs.
•
Two dedicated (BRAKE/DRIVEENABLED and DRIVE READY), normally open relay
outputs.
Analog I/O
Two analog inputs are dedicated to current limits and two analog outputs can be customized to fit the
application:
•
One dedicated 10 bit, 0 – 10 Volt, analog inputs (EXTERNAL CURRENT LIMIT)
•
One selectable, ±10 Volt analog outputs, one 12-bit and one 8-bit (ANALOG).
AC Input Power
OMNIDRIVEs covered by this manual are powered directly from a main 100-240 VAC single phase line.
Personality Module
EEPROM (electrically erasable programmable read-only memory) stores both motor and application
specific settings and parameters for the drive.
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