Pin-Out Description - Galil Motion Control DMC-14 5 Series Manual

Pin-Out Description

OUTPUTS
Analog Motor Command +/- 10 Volt range signal for driving amplifier. In servo mode, motor command
Amp Enable
PWM/STEP OUT
PWM/STEP OUT
Sign/Direction
Error
Output 1-Output 3
INPUTS
Main Encoder, A+, B+
Main Encoder Index, I+
Main Encoder, A-, B-, I- Differential inputs from encoder. May be input along with CHA, CHB for noise
Aux Encoder, A+, B+, A-
, B-
Abort input
156 Appendices
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output is updated at the controller sample rate. In the motor off mode, this output is
held at the OF command level.
Signal to disable and enable an amplifier. Amp Enable goes low on Abort and OE1.
PWM/STEP OUT is used for directly driving power bridges for DC servo motors or
for driving step motor amplifiers.
For servo motors: If you are using a conventional amplifier that accepts a +/-10 Volt
analog signal, this pin is not used and should be left open. The PWM output is
available in two formats: Inverter and Sign Magnitude. In the Inverter mode, the
PWM signal is .2% duty cycle for full negative voltage, 50% for 0 Voltage and
99.8% for full positive voltage (24kHz switching frequency). In the Sign Magnitude
Mode (Jumper SM), the PWM signal is 0% for 0 Voltage, 99.6% for full voltage and
the sign of the Motor Command is available at the sign output (50kHz switching
frequency).
For step motors: The STEP OUT pin produces a series of pulses for input to a step
motor driver. The pulses may either be low or high. The pulse width is 50%. Upon
Reset, the output will be low if the SM jumper is on. If the SM jumper is not on, the
output will be tristate.
Used with PWM signal to give the sign of the motor command for servo amplifiers or
direction for step motors.
The signal goes low when the position error on any axis exceeds the value specified
by the error limit command, ER.
These 3 TTL outputs are uncommitted and may be designated by the user to toggle
relays and trigger external events. The output lines are toggled by Set Bit, SB, and
Clear Bit, CB, instructions. The OP instruction is used to define the state of all the
bits of the Output port.
Position feedback from incremental encoder with two channels in quadrature, CHA
and CHB. The encoder may be analog or TTL. Any resolution encoder may be used
as long as the maximum frequency does not exceed 12,000,000 quadrature states/sec.
The controller performs quadrature decoding of the encoder signals resulting in a
resolution of quadrature counts (4 x encoder cycles). Note: Encoders that produce
outputs in the format of pulses and direction may also be used by inputting the pulses
into CHA and direction into Channel B and using the CE command to configure this
mode.
Once-Per-Revolution encoder pulse. Used in Homing sequence or Find Index
command to define home on an encoder index.
immunity of encoder signals. The CHA- and CHB- inputs are optional.
Inputs for additional encoder. Used when an encoder on both the motor and the load
is required. Not available on DMC-1425.
A low input stops commanded motion instantly without a controlled deceleration.
Also aborts motion program.
DMC-14x5/6