Nexen RSD200 964531 - Manual (Page 4)

FORM NO. L-21161-E-0108 
POWER
SUPPLY
CUSTOMER SUPPLIED
CUSTUMER
AIR SUPPLY
E/P
or
I/P FILTER
RSD200
OPTIONAL
PLC
Brake,
Clutch,
or Drive
Position
Sensor
INTRODUCTION
The Nexen RSD200 is a microprocessor based position
controller designed to minimize dancer arm movement
during tension disturbances and then return the arm to
its running position. The RSD200 features two different
control choices:
• Use the analog output and a Nexen* current or
voltage-to-pressure converter such as the EN40 or
EN50 to control a Nexen* pneumatic brake or clutch
(Refer to Figure 1).
Figure 1
RSD200 O
veRview
As a roll changes diameter, a dancer control must adapt to the corresponding changes in speed, inertia and torque.
Many web machines have very different tension settings. Therefore, compensating for the effects of tension setpoint
changes is important if high dancer performance is desired. High dancer performance not only ensures constant
tension, it allows for faster machine accelerations and decelerations, which means more production on many machines.
The RSD200 is a truly adaptive controller and will adapt its response to changing roll diameter and inertia
conditions. This ensures that the RSD200 will always provide the right amount of action for stable dancer arm
performance.
Other benefits: 1) Diameter sensing is not necessary 2) Splicing different size rolls without readjustment 3) Excellent
performance at slow web speeds and on small rolls.
There are two models in the RSD200 product family: the RSD200 and RSD200P. The RSD200P provides all the
same features and capabilities as the RSD200 plus tension compensation. In applications where tension setpoints
change by more than ±50%, the RSD200P should be used.
• Use the analog output as a torque control signal for
an unwind or rewind motor drive.
The RSD200 is housed in a dust tight and drip proof
enclosure enabling it to be mounted near the brake or
clutch.
All set up parameters are passed to the controller via
RS232 connection that makes remote control and
adjustment possible.
* Any appropriate transducer and clutch or brake unit may be used with the RSD200, but for optimal performance, Nexen recommends using the complete RSD dancer control system.