Design and function
42/68-831-EN EBS852,
EBS862 (Contrac)
13
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3 Design and function
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Fig. 6: Ex design
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Functionality
The electronic units for the Contrac RHDE... and RSDE... series actuators are available in two
sizes for rack mounting. Special parameters can be used to adapt the electronic units to the
type of actuator concerned. The electronic units EBS852, EBS862 (Contrac) are the interface
between actuator / valves and fittings and process control system.
The actuators / valves and fittings are positioned continuously, whatever the type of input signal
(analog or digital). During continuous positioning the motor torque is varied steplessly until the
actuator force and the restoring process forces are balanced.
High positioning accuracy combined with excellent control quality and a long actuator life can
even be achieved under varying load conditions and with short stroke times.
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