Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 129)

Application Data
Appendix D
D-2
The 1333 Series D has the ability to allow a single external 10k
Ω
, 2W
manual speed potentiometer and one other reference signal to be connected
to the drive at the same time. The drive may be switched from the manual
potentiometer to the alternate reference signal by means of a selector
switch. As shown in the Control and Signal Wiring section of Chapter 4,
only one of these signals should be connected to the Control and Signal
Wiring Terminal Block at any time.
Shown below is a method of switching between an external speed pot and
one alternate reference signal.
Pot
1 2 3 4 5
Wiper Pot
High
Pot
Low
External
Speed Pot
Logic
Common
Drive
End
Earth
Ground
Shield
+ -
4-20mA
Pot
1 2 3 4
Wiper Pot
High
Pot
Low
External
Speed Pot
Logic
Common
Drive
End
Earth
Ground
Shield
+ -
0Ć5V
or
0Ć5V/Speed Pot
0Ć10V/Speed Pot
4Ć20ĂmA/Speed Pot
or
0-10V
The Bulletin 1333 Series D must be programmed for external speed control
by setting Parameter 9 to:
•
1 if drive speed is to be controlled by a 0-5V DC signal or an external
speed pot.
•
2 if drive speed is to be controlled by a 0-10V DC signal or an external
speed pot.
•
3 if drive speed is to be controlled by a 4-20 mA DC signal or an
external speed pot.
When the selector switch in series with the potentiometer is open, the drive
will use the 0-5V DC, 0-10V DC, or 4-20 mA DC signal as the speed
reference.
When the selector switch is closed, the drive will use the potentiometer
signal as the speed reference.
If the selector switch is toggled while the drive is running, the drive will
accelerate or decelerate to the new speed reference at the programmed
accel or decel rate.