Emotron EMX-P0 pages

Control unit for smaller
rotating heat exchangers

Know-howEmotron EMX-P
and commitment
are always included
Service offer of CG Drives & Automation

Safe and reliable operation
•t No tuning
•t Less wear– soft start/soft stop
•t Less temperature oscillation– large speed range
•t Automatic purging operation
•t Rotation monitor with external rotation sensor
•t Full control of speed with tachometer feedback
•t Selectable types of speed control
•t Linearization function – control signal contra rotor
t efficiency
•t Control inputs have common galvanic insulation from
t the mains supply
Emotron EMX-P is a small and flexible control unit
specially adapted for speed regulation of smaller rotary
heat exchangers. A motor with gear and tachometer from
Panasonic or Oriental Motor (25 W or 40 W and max 0.7A)
are intended to be connected to the control unit. Both
the motor and the control unit are easily placed inside the
heat exchanger housing.
EMX-P offers many functions that ensure safe and reliable
operation. The control unit uses a new technology that
provides more effective control with smaller losses and
higher torque. Greater speed range gives better recovery
and therefore less temperature oscillation. In addition,

the control unit’s built-in soft start and soft stop function
ensures less equipment wear. During intermittent operation
start-up is adaptive to provide a fast and smooth start.
Automatic blow clean operation is another built-in function.
When the control signal drops below a certain value, the
heat exchanger’s rotor rotates approximately 30 degrees
every 10 minutes to keep it clean. The system can easily
be supplied with a rotation monitor that triggers an alarm
if the belt comes off, for example. If the motor is equipped
with overload protection (e.g. Panasonic) an alarm is also
triggered when the protection trips.
EMX-P enables the type of speed control to be selected.
In continuous operation, the speed is varied down to
1/25 of the maximum speed, whilst continuous operation
with intermittent operation during low control signals, the
speed is varied down to 1/50 of the maximum speed.
An integrated linearization function provides a linear
function between the control signal and the rotor’s
efficiency, instead of the speed being proportional to the
control signal. This provides better conditions for stable
temperature control.
Operation indication occurs via two LEDs and an output
relay with change-over contact. The relay changes-over
when the rotation monitor activates the alarm, in the
event of a network power failure and in the event of an
overload.
CG also supplies complete drive systems with control
units and motors for rotating heat exchangers with a
rotor diameter of up to 5.5 metres. Contact us for further
information.