C
L E A R
P
A T H
M C / S D
U
S E R
M
A N U A L
R
E V
.
3 . 0 9
4 6
T
EKNIC
,
I
NC
. T
EL
.
(585)
784-7454
T
HE
E
NABLE
I
NPUT
The
Enable Input
controls power to the motor coils. When a ClearPath
is powered up and the Enable Input is asserted (i.e. 5–24VDC is present at
the Enable Input) the motor windings energize and ClearPath is able to
respond to control signals at Inputs A and B.
When Enable is deasserted power to the motor coils is removed and the
motor cannot respond to user inputs
.
Safety Note:
The Enable Input is not designed for safety compliance use.
Main power must be removed to ensure safety.
When Enable is asserted:
•
Motor windings energize
•
Motor will respond to inputs
•
Shaft is able to spin
WARNING!
An enabled motor can
and will spin in
response to input
states. Always keep
fingers, clothing, and
other objects clear of
motor shaft.
Enable
+
Enable
-
Current
Limiter
5-24VDC
ClearPath Enable Input
Caution:
When ClearPath is in “Spin on Power-Up” mode, it can spin as
soon as main DC power is applied. All inputs,
including the Enable Input
,
are ignored in this mode. For safety reasons, ClearPath motors never ship
configured in "Spin on Power-Up" mode.
Enable-With-Trigger function.
In a few ClearPath modes, the Enable
input also serves as a trigger input. In these modes, briefly pulsing the
Enable input low (and immediately back high again) causes ClearPath to
perform a predefined action, such as execute a move, change direction of
rotation, or change velocity. See individual operation modes for trigger
mode details.
I
NPUTS
A
AND
B:
T
HE
C
ONTROL
I
NPUTS
Inputs A and B
are the main user control inputs. Their function changes
automatically based on the ClearPath mode of operation you choose. In
some modes simply apply a PWM signal to control velocity or torque. In
other modes, set the inputs high or low to move a preset distance, ramp to
a target velocity, change direction, or move until a sensor trips. For
ClearPath SD models, apply standard step and direction signals to the
inputs to create your own motion profiles.
Tip:
Input A and Input B functions are defined at the beginning of each
operational mode section.
Engineer’s Note:
In all ClearPath motors, the input signals are
electrically isolated from the DC power bus and motor output circuits, as
2
Exception:
when ClearPath is set to “Spin on Power Up” mode, the motor shaft can move
as soon as main DC power is applied, regardless of the state of the Enable Input.
ClearPath motors never ship configured in this mode.