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Rockwell Automation Publication MM-IN001B-EN-P - February 2022
Kinetix MMA Asynchronous Main Motors Installation Instructions
Brakes
Kinetix MMA main motors can be configured with an optional electromagnetic holding brake. Most brakes can also be configured with a hand-release or a status switch
(microswitch) for additional functionality. See the
The brakes are spring actuated, and are suitable for use as parking/holding brake. This type of brake can be used to hold the load regardless if power is applied to the
motor. The brake holding torques are designed to meet or exceed the continuous stall torque of the motor, however, some motors can develop a torque value that may
exceed the holding torque capability. See
for brake holding torques.
All electromagnetic holding brakes have two additional options, they can be equipped with brake hand-releases and status switches.
The hand-release is a non-standard option that can be used on all motor shaft heights, except shaft height 225 with the 400V AC control. This manually operated brake
hand-release is used to assist an operator to disengage an electromagnetically charged holding brake.
See
Brake Considerations on page 45
and
Brake: Hand-release on page 25
for additional information.
Blower
The Kinetix MMA Asynchronous Main Motors contain a separately powered blower. There are two blower types, axial and radial, with various input voltages, as shown in
.
See
Blower Specifications, Replacement, and Repositioning on page 48
for more information.
A motor can also be ordered without a blower, and is prepared with an adapter shroud that receives clean-air from an external source. This option is called IC17. See the
for more information.
Thermal Sensors
Your Kinetix MMA main motor comes standard with two thermal sensors, for protection and optimal performance. A thermostat (TS) provides a normally-closed signal to the
inverter, protecting the motor windings from overheating due to prolonged motor overloading or malfunction. The other thermal sensor that comes standard is a PT1000
thermistor. This sensor, which is connected to a 1756-IRT8I Logix thermal sensor module, can monitor motor winding temperature in real-time, for optimal performance and
customized thermal management. Other temperature sensors are available as selectable configurations, for measuring winding or bearing temperatures.
Thermal Sensor and Thermal Switch Terminations on page 23
for a list of thermal sensor options and specifications.
See the Knowledgebase article:
Kinetix MMA Frequently Asked Questions
, for additional information.
Motor Feedback Connector and Cable on page 13
and the
When the brake is installed, it limits the maximum speed of the motor and, in some cases, vertical installation is not allowed. Consult
the motor and brake technical data sheets for the maximum allowed speed or contact
for more details.
Table 3 - Motor Blower Options
(1)
(1)
Without a blower, the IC17 clean-air option does not carry a cURus certification from the factory.
Motor Cat. No.
Axial 1-PH
(Blower Cat. No. A)
Axial 3-PH
(Blower Cat. No. B)
Radial 3-PH
(Blower Cat. No. C)
MMA-B080
xxx
220…230V AC; 50/60 Hz
—
—
MMA-B100
xxx
200…240V AC; 50/60 Hz
—
—
MMA-B132
xxx
—
380…420V AC; 50/60 Hz
MMA-B160
xxx
200…277V AC; 50/60 Hz
380…480V AC; 50/60 HZ
MMA-B180
xxx
—
MMA-B225
xxx
—