R&M Materials Handling VARIABLE SPEED CONTROLS ControlMaster Plus Service Manual - Manual (Page 7)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
7/83 R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
1.2 Basic description
Inverter has many advantages and offers many new features, when compared to other inverter based systems,
which might be used in crane applications.
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.
Crane user interface Interface with pre-designed locations for 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 Includes the brake contactor for disk brakes. Includes also DC-rectifier.
Electrical Braking Includes a braking transistor and a braking resistor.
Control methods Can be controlled by
the electronic potentiometer control with 2-step or 3-step pushbuttons,
the multistep control with 2-4-step controllers.
Limit switch functions Built-in slowdown (S11, S21) and stop limit switch (S12, S22) functions for both running directions.
Speed supervision Inverter 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.
Protections Includes a motor thermal protection, which is based on motor temperature measurement by Klixon placed in
motor windings. A great number of other protections included are shown in the technical data.
Tested parameters Inverter includes tested parameters with different motors for all power ratings. This is a benefit, which makes
every inverter delivery a proven solution. The tested and pre-set motor parameters enable a quick start-up in
crane commissioning.
1.3 Main components
The main components are:
Power class
A1 Inverter
F7 Brake supply circuit breaker 007 - 055
K7 Brake contactor
G1 Brake control unit REC12 002-011
G1 Brake control unit ESD141 015-055
F71 Circuit breaker for the second brake contactor 055
K71 Second brake contactor 055
The most important external components are:
R1 Braking resistor unit
M1 Hoisting motor
Y1 Mechanical brake
A5 KAE234 Proximity switch buffer amplifier for speed sensor
B5 Speed sensor
B6 Thermal sensor for motor protection
Overload protection device
Control devices (switches, pushbuttons etc.)
Limit switches
Example layout