Aerotech BAL LINEAR AMPLIFIER SERIES, User Manual

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BA Linear Series User’s Manual Technical Details
Version 1.5
Aerotech, Inc.
3-3
Table 3-3. Electrical Specifications (Continued)
Feedback Inputs
- Hall A-Pin 4, Hall B-Pin 16, Hall C-Pin 17: HED inputs for commutation, 0 to 5
VDC, internal pull-up, 10K input. Commutation signals used with brushless motors to
provide motor rotation position information to the amplifier. This allows the amplifier
to steer the three phases of the motor currents in such a fashion so as to provide rotation
of the motor in the desired direction at the desired speed. TTL level input for digital;
analog for sine wave (optional).
- sine/sine-N-Pin 18, Pin 19, cosine/cosine-N-Pin 5, Pin 6: Encoder inputs for velocity
feedback, single ended 0 to 5VDC TTL, internal pull-up, 10K input. Sine and cosine
are optionally used in conjunction with one another for deriving an electronic
tachometer signal.
- +tachometer-Pin 3: Tachometer input for velocity feedback, (encoder vs. tach velocity
feedback is jumper selectable). A tachometer may be used in the velocity loop
configuration to provide negative feedback to the amplifier. This allows the amplifier to
close the servo loop and control the stability of the loop.
- tachometer- Pin 15: Reference input for tachometer. This point is identical to signal
common.
Logic Inputs
- ilmt-Pin 24, +ilmt-Pin 11: Directional current limit inputs (jumper selectable
polarity). When “+ILMT” is pulled to its active state, motion in the positive direction
(CW motor shaft rotation) is inhibited. When “-ILMT” is pulled to its active state,
motion in the negative direction (CCW motor shaft rotation) is inhibited. TTL level
input 0 to 5 VDC, internal pull-up, 10K input.
- shutdown-Pin 10: Jumper selectable active high or active low input. Used to shut off
power stage and therefore remove all power to the motor. TTL level input 0 to 5 VDC,
internal pull-up, 10K input.
- signal ground-Pins 7 and 14: Electrical reference for all control circuitry on amplifier.
- signal shield-Pin 1: Connected internally to earth ground. Used for reducing electrical
noise in control and feedback signals.
Logic Outputs
- fault-Pin 23: Jumper selectable active high or active low output. Used to indicate the
status of the power stage (amplifier enabled or disabled). The fault output will go to its
active state upon a power stage fault, thermal overload, RMS current limit, power
supply under voltage condition. Open collector output. Requires pull-up resistor to
external power supply ranging from +5V to +30V.
Monitor Outputs
- icmd-Pin 25: Current command monitor. Representative of the current command.
±
3V output.
Power Inputs
- AC input: AC HI , AC LO, earth ground (
G [depending on model]
), 115-230 VAC, 50-
60 Hz, single phase.
Motor Outputs - Motor - phase A, phase B, phase C.
Auxiliary Power
Outputs
- 5V-Pin 20: On board 5V power supply. 250 mA maximum output.
- 5V-Pin 2: On board 5V power supply. Pin 2 is intended for powering an encoder.
Can supply up to 250mA of current.
Connectors
- control: 25 pin “D” style female.
- power: 6 pin unpluggable screw terminal for AC input and motor output; mate
provided.
Potentiometers
- Gain: adjusts preamp AC gain.
- BALance: nulls command input DC offsets.
- Tach: adjusts gain of tach or encoder derived velocity feedback input.
- Input: adjusts gain of command input.