Application Notes
Leader-follower application
In this application, use a PCM4 to monitor the speed of the leader motor (Figure 13). The
PCM4 isolates the leader motor from the follower drive, and outputs a voltage proportional
to the leader motor armature voltage. The follower drive uses this voltage reference to set
the speed of the follower motor. An optional ratio potentiometer may be used to scale the
PCM4 output voltage.
MOTOR
PCM4
TB501
TB502
10K Ohm
(optional)
Follower
Drive
Leader
Drive
A1
9
(+)
(+)
(-)
(-)
8
2
1
S2
S1
7
A2
Figure 13. Leader-Follower Application
Single speed potentiometer control of multiple drives
Multiple drives can be controlled with a single speed adjust potentiometer using a PCM4
at the input of each drive to provide isolation (Figure 14). Optional ratio potentiometers can
be used to scale the PCM4 output voltage, allowing independent control of each drive.
MOTOR
MOTOR
PCM4
TB501
7
8
6
1
2
7
8
6
1
2
TB502
TB501
TB502
PCM4
DRIVE A
ratio pot A
(optional)
10KΩ
ratio pot B
(optional)
10KΩ
S2
S1
DRIVE B
S2
S1
A2
A1
A2
A1
Figure 14. Single Speed Potentiometer Control of Multiple Drives
Summary of Contents for XP-AC Series
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