R&M Materials Handling VARIABLE SPEED CONTROLS ControlMaster Elite Manual - Manual (Page 6)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
!
: (937) 328-5100
FAX: (937) 325-5319
6/31
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
1.3 Basic description
D2H and D2C have many advantages and offer many new features, when compared to other inverter
based systems, which might be used in crane applications.
Inverter The inverter in D2H and D2C is a crane inverter. The specific crane
features for the inverter hardware and the special software are achieved
by combining the experience and know-how of crane applications with
the latest technology. The inverter uses vector calculation for several
different motor control modes.
Crane user interface All D2H and D2C have exactly the same interface with pre-designed
locations for all typical crane functions. The main part of this interface is
carried out by a terminal strip, which has separated sections for signals
with main, control and electronics voltage levels.
Brake control D2H and D2C include the brake contactor for disk brakes. D2H also
includes it’s own DC-rectifier.
Electrical braking D2H and D2C include a braking transistor, which is dimensioned for
every crane application. For resistor braking D2H and D2C are equipped
with external resistor, D2C also with internal braking resistor up to 015F.
Control methods D2H and D2C can be controlled by the electronic potentiometer control
with 2-step pushbuttons, the potentiometer control with analog joystick-
type control, the automation control with PLC and radio controls and by
the multistep control with 2-4-step controllers. All these control methods
are available with every D2H and D2C.
Limit switch functions D2H and D2C have built-in slowdown and stop limit switch functions for
both running directions.
Speed supervision D2H includes a speed supervision unit SSU, which is separate from the
inverter and not dependent on software. This safety circuitry is used to
monitor the speed of the motor. In case of speed difference, overspeed
or stall, the speed supervision unit stops the motion immediately. D2C
can also be equipped with SSU.
Protections D2H and D2C include a motor thermal protection, which is based on
motor temperature measurement by thermistors placed in the motor
windings. A great number of other protections included in every D2H and
D2C are shown in the technical data.