M O T I O N C O N T R O L L E R S
DMC-1700 ISA Bus Controller
Galil Motion Control, Inc.
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 pro-
duce outputs in the format of puls-
es and direction can also be used.
Encoder index, I+: Once-per-revolu-
tion encoder pulse; used in
Homing sequence or Find Index
command. Minimum index pulse
width is 120 µsec.
Encoder, A-, B-, I-: Optional differen-
tial inputs from encoder; used for
enhanced noise immunity.
Auxiliary encoder: Inputs for addition-
al encoder; used when encoders
on both the motor and the load
are required. Available on servo
: Stops commanded motion
instantly and also aborts applica-
Reset*: System reset.
Forward and reverse limit switch#:
When active, inhibits motion in
forward or reverse direction and
also causes the limit switch sub-
routine #LIMSWI to execute.
: 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 program. Inputs
924 available with DMC-1750 thru
: High-speed position latch to
capture axis position within 40
µsec (bypass optoisolation for .1
µsec capture). AL command arms
latch. Input 1, 2, 3, 4 latches X, Y,
Z, W respectively or the auxiliary
encoder of X, Y, Z and W. Inputs
9, 10, 11, 12 latches E, F, G, H axes
respectively for DMC-1780.
Analog 1 Analog 8: Analog inputs that
can be connected to external analog
signals such as force or pressure
transducers. 12-bit resolution ADC
for ±10 V input used for position
feedback. 16-bit ADC optional.
Analog motor command: ±10 V range
signal for driving servo amplifiers
has 16-bit resolution or .0003
Amp enable*: Signal to disable and
enable an amplifier. Amp enable
goes low when a motor-off condi-
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 sig-
nal 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 command, ER.
Output 1 Output 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
Bit (OB), and OP instructions.
Outputs 916 available with
DMC-1750 thru DMC-1780.
# Active high or low. Optoisolated 2.2 K
in series; requires at least 2 mA of sinking current to activate.
* Active low