Rockwell Automation Allen-Bradley 160 SSC Series, User Manual

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Installation and Wiring 2-19
±
10V or 0 – 10V DC Frequency Control/Speed Control Figure 2.17
4 – 20 mA Frequency Control/Speed Control Figure 2.18
Potentiometer Frequency Control/Speed Control Figure 2.19
When connecting a single potentiometer to multiple drives it is important to connect
commons (TB3-3) together for all drives. TB3-3 (common) and TB3-2
(potentiometer wiper) should be daisy-chained to each drive. All drives must be
powered up for the analog signal to be read correctly. Predicting actual performance
given the variety of installation possibilities is difficult, however, up to five drives
with two meters of cable between have been tested without problems.
Typical Multiple Drive Analog Connection Figure 2.20
Preset Frequency Sources
The Analog Signal Follower model has a special input mode, P46 setting 8 that
allows the drive to be operated via preset speed inputs. See Figure 2.12 and Table
2.I for details.
23
±
10V or 0 – 10V DC
Common Controller Input Impedance = 100k Ohms
TB3
If calibration is required, use
parameters 16, 59, 60, 74, 75, 76
34
If calibration is required, use
Common parameters 16, 59, 60, 74, 75, 76
4 – 20 mA Controller Input Impedance = 250 Ohms
TB3
Wiper
Common
10V DC Supply
TB3
1
23
If calibration is required, use
parameters 16, 59, 60, 74, 75, 76
10k Ohms, 2 Watt Linear Taper
TB3
1 2 3 1 2 3 1 2 3 1 2 3
Optional Ground
Connection