AB Quality ALLEN-BRADLEY 1391-DES, User Manual

Page: 31 / 149

Chapter 5
Inputs, Outputs and Switch Settings
5-2
Analog Out 2 (Current) (TB2, Terminal 6)
A voltage corresponding to positive and negative current will be present at
this terminal and signal common (Terminal 7). +3V DC equals 100% of the
continuous rating of the motor with +6V DC equaling 200%. Minimum
impedance that can be placed across this output is 10k ohm.
Enable Input (TB2, Terminals 9, 10)
Normal Run commands to the drive are performed through the Enable
input and any additional user supplied run control circuitry. With input
power applied and the line contactor energized, a mechanical contact
closure (or a solid-state contact closure rated +15 to +30V DC, 30 mA)
between TB2-9 & 10 will cause the drive to run. When this input is
de-energized, the control will cause a regenerative braking action in the
motor.
Reset (TB2, Terminal 11)
Removing the Enable signal and momentarily connecting this terminal to
signal common (TB2-12) will reset the drive after a drive fault occurs.
Important: A Reset must not be initiated until the cause is determined and
corrected.
Adjustable Current Limit (TB2, Terminal 13, 14)
The current limit of the drive is set to 300% of motor continuous rating or
twice the continuous rating of the drive, whichever is lower. Applying a
voltage between 0 and +10V DC to terminals 13 & 14 will limit the peak
current of the drive. The range of this input is the lower of the following:
- Value set by parameters 156 and 157,
- Twice the continuous rating of the drive.
For each volt applied, 30% reduction of current limit is achieved, based on
300% of motor rating being available. If only 200% current (drive peak) is
available, a voltage of less than 3.33 volts will have no effect on current
limit. On TB2, pin 14 must be positive with respect to pin 13 for this input
to operate. Refer to the following information.
Percent of Percent of
Voltage Peak Rating Voltage Peak Rating
10V 10% 4V 180%
9V 30% 3V 210%
8V 60% 2V 240%
7V 90% 1V 270%
6V 120% 0V (open) 300%
5V 150%
Torque Command Input (TB2, Terminals 15, 16)
Terminals 15 and 16 provide a small amount of input filtering for operating
the drive as a torque block (with IMC S Class, MAX, IMC 121 and 123) or
velocity feedforward mode. A
±
3V DC command equals 100% of the
motor current setting (as set by parameter 155).