Beck 14-100, Инструкция по эксплуатации

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18
80-1403-01, Rev. 3
DCM-3 OVERVIEW
This instruction manual describes two basic
types of DCM-3. One type is compatible with
Foundation Fieldbus networks, and one type
is compatible with HART networks and analog
signals.
The DCM-3 is a computerized circuit board
that receives the Demand signal from the control
system, monitors the position of the output shaft,
and runs the motor to move the output shaft to
match the Demand signal. The DCM-3 also
provides alarms and status information back to
the control system, contains indicating LED’s for
local indication, and records information related to
actuator performance.
Output shaft position sensing is performed by
a circuit board located in the Control End called
the CPS-5. The CPS-5 sends a signal directly to
the DCM-3. Refer to the image on page 4 for the
typical location of the CPS-5.
Although configuration information is stored
in the DCM-3, the Control End applies some
limitations on the DCM-3 functionality. For
example, the DCM cannot cause the output shaft
to travel beyond the settings of the over-travel limit
switches that are located in the Control End. The
Control End is shipped from the factory entirely
configured and tested, and most applications will
not require changes. For more information on the
Control End, refer to OUTPUT SHAFT POSITION
SENSING (page 30), and CONTROL END
OVERVIEW (page 34).
Except for the interface being either
Foundation Fieldbus or HART/analog, most
aspects of the DCM-3 models are the same
regardless of the network type. For example,
both models have adjustable step size, measure
the output shaft position by monitoring the signal
from the CPS-5, and have the ability to measure
ambient temperature. Both models store the same
statistical data. The different interface circuitry
makes the models specific for each interface.
DCM-3 PHYSICAL LAYOUT
DCM‑3’s differ based on the required
control system interfaces, but all are physically
interchangeable and have common features. The
physical interchangeability allows for adapting to
control system updates. The common features
provide a universal foundation for operation.
DCM‑3
LAYOUT
Mounting Screws
(4 places)
Overview LEDs
Direction LEDs
Serial Port
Fuse
(ensure cover is
in place before
energizing)
Test Point 4
(TP4)
Test Point 2
(TP2)
Test Point 3
(TP3)
Test Point 1
(TP1)
Status
Indication LEDs
Pushbuttons
Torque
Sensing
Connector
DCM-3
Features