Connect An Analog Speed Reference - PowerTec Regenerative Brushless DC Motor Control 1000AR Installation And Operation Instruction Manual

H O W D O I ...
CO NNE CT AN ANALO G S P E E D RE F E RE NCE ?
R+ R-
TB2
1 2 3 4 5 6 7 8 9
SPEED POT
CW
10K
TB2
1 2 3 4 5 6 7 8 9
CCW
SPEED POT
CW
10K
TB2
1 2 3 4 5 6 7 8 9
-
+
0 TO 10VDC
REFERENCE
starting the drive. Starting the drive with a speed input already present will not damage the drive, even at
very high accel rates.
The Brushless DC drive operates over very wide speed ranges, so when you want the motor to stop
with the drive in RUN mode, there must be ZERO VDC at the input. Voltages as low as 70 millivolts (0.070
VDC) will cause the motor to turn. Noise levels on the reference line can reach these values. You must be
very careful about shielding and common mode voltages if you expect to operate with references of less
than 0.5 VDC.
OFFICIAL
1000AR
Model Installation and Operation Manual
10 VDC to +10 VDC with the positive connection on TB2
terminal 5 and the common connection on TB2 terminal 16.
Voltages less than -10 VDC become non-linear and
voltages greater than 10 VDC become non-linear.
potentiometer with a resistance greater than 10 Kohms
may result in non-linear operation of the speed pot.
+10VDC source at TB2 terminal 6. The supplies have a 10
ma limit.
the motor is dependent on the polarity of the input
BI-DIRECTIONAL
OPERATION
reference. Connections are shown in the figure on the left
for bi-directional operation (-10 VDC for full speed forward
10 11 12 13 14 15 16
to +10VDC for full speed reverse. Zero VDC is zero speed.
for noise reduction. Connect the shield only at the drive
end, on TB2 terminal 16.
UNI-DIRECTIONAL
OPERATION
10 11 12 13 14 15 16
come from the reference sources at TB2 terminals 4 and 6.
You can introduce an external reference voltage between
TB2 terminals 5 (+) and 16 (common). The speed of the
motor varies as the external voltage varies. The direction of
the motor changes when the polarity of the signal changes.
EXTERNAL SOURCE
(such as a 4 to 20 ma signal), you must convert it to a
10 11 12 13 14 15 16 voltage. Then you may introduce this voltage as a speed
reference command to TB2 terminal 5 (+) and TB2 terminal
16 (-), as shown in the diagram.
not necessary to reduce the speed signal to zero before
6/4/2001
The analog speed reference for the Model 1000AR is -
The input impedance is about 100K. Using a speed
There is a 10VDC source at TB2 terminal 4 and a
There is no minimum speed pot on the 1000AR.
The input at TB2 terminal 5 is bi-polar. The direction of
Enclose the wires to a speed pot in a shielded cable,
The reference voltage for the input does not have to
If you use an external "current source" speed control
When using a speed pot or an external voltage, it is
25
P
AGE