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Galil Motion Control - catalog (Page 53)

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Galil Motion Control - catalog
M O T I O N C O N T R O L L E R S
DMC-1300 VME Bus Controllers
57
I/O DESCRIPTION
Inputs:
Encoder, A+, B+: Position feedback
from incremental encoder with two
channels in quadrature. The
encoder can be analog (±12 V) or
TTL. Note: Encoders that produce
outputs in the format of pulses and
direction can also be used.
Encoder index, I+: Once-per-revolu-
tion encoder pulse; used in hom-
ing sequence or find index com-
mand. Minimum index pulse
width is 120 nsec.
Encoder, A-, B-, I-: Optional differen-
tial inputs from encoder used for
enhanced noise immunity.
Auxiliary encoder: Inputs for additional
encoder; used when encoders on
both the motor and the load are
required.
Abort*
#
: Stops commanded motion
instantly and also aborts applica-
tion program.
Reset*: System reset.
Forward and reverse limit switch
#
: When
active, inhibits motion in forward
or reverse direction and also causes
the limit switch subroutine #LIM-
SWI to execute.
Home switch
#
: Input for homing (HM)
and find edge (FE) instructions.
Input 1­ Input 8
#
: Uncommitted
inputs; can be defined by the user
to trigger events or interrupt pro-
gram. Inputs 9 ­ 24 available
with DMC-1380.
Latch
#
: High-speed position latch to
capture axis position within 25 µsec
(bypass optoisolation for .1 µsec
capture). AL command arms latch.
Input 1, 2, 3, 4 latches X, Y, Z, W
respectively. Inputs 9, 10, 11, 12
latches E, F, G, H respectively for
DMC-1380.
Analog 1­Analog 7: Analog inputs that
can be connected to external ana-
log signals such as force or pressure
transducers. 12-bit resolution ADC
for ±10 V input. Can also be used
for position feedback with -AF
option
Outputs:
Analog motor command: ±10 V range;
signal for driving servo amplifiers;
16-bit DAC
Amp enable*: Signal to disable and
enable an amplifier. Amp enable
goes low when a motor-off condi-
tion occurs. For step motors, this
pin provides for reduced current
when low.
STEP OUT: Pulses for input to a step
motor driver. The pulses can be
either active low or high. Upon
reset, the output will be low if the
SM jumper is on, Tristate if off.
The STEP OUT pin also provides
the PWM signal for servo motors.
Direction: Used with the STEP OUT
signal to give direction to step
motors or servo motors in the sign
magnitude mode.
Error*: The signal goes low when the
position error on any axis exceeds
the limit specified by the error com-
mand, ER.
Output 1­Output 8: These 8 TTL out-
puts are uncommitted and can be
designated by the user to toggle
relays and trigger external events.
The output lines are toggled by set
bit (SB), clear bit (CB), define out-
put port (OP) instructions. Upon
reset these signals will be low.
Outputs 9­16 available with
DMC-1380.
VME BUS
DMC-1300
# Optoisolated 2.2 K
in series; requires at least 1 mA to activate.
* Active low

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