Rockwell Automation RDD-B4102 User Manual

Installation Instructions

RDD-Series Rotary Direct Drive Bearingless
Motors

Catalog Numbers RDB-B2901, RDB-B2902, RDB-B2903, RDB-B4101, RDB-B4102, RDB-B4103

Topic Page

Important User Information 2
Catalog Number Explanation 3
Before You Begin 4
Install the Motor 9
Remove the Motor 20
Connector Data 27
Product Dimensions 28
Connector Information 31
Specifications 31
Additional Resources 32

About the Direct Drive Bearingless Motors

RDD-Series direct drive motors feature single-turn or multi-turn high resolution
encoders. These bearingless housed motors provide a compact design for direct
drive applications.

2 RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment.
Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls, publication

, is available from your local Rockwell Automation sales office or online at

SGI-1.1
http://literature.rockwellautomation.com

equipment and hard-wired electromechanical devices. Because of this difference, and also because of the
wide variety of uses for solid state equipment, all persons responsible for applying this equipment must
satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many
variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot
assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

Identifies information about practices or circumstances that can cause an explosion in
a hazardous environment, which may lead to personal injury or death, property
damage, or economic loss.

describes some important differences between solid state

Publication RDB-IN002B-EN-P — February 2010

Identifies information that is critical for successful application and understanding of
the product.

Identifies information about practices or circumstances that can lead to personal injury
or death, property damage, or economic loss. Attentions help you identify a hazard,
avoid a hazard and recognize the consequences.

Labels may be on or inside the equipment, for example, a drive or motor, to alert
people that dangerous voltage may be present.

Labels may be on or inside the equipment, for example, a drive or motor, to alert
people that surfaces may reach dangerous temperatures.

RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions 3

RD B -B 410 3 F -7B 7 2 AA

Catalog Number Explanation

FACTORY DESIGNATED OPTIONS
AA = Standard
BRAKE
2 = No Brake

CONNECTORS
7 = Circular, Right Angle, Feedback 180° Rotatable

ENCLOSURE/SHAFT
B = IP65 Housing/Blind Bore
T = IP64 Housing/Thru Bore
FEEDBACK
3 = Single-turn High Resolution Heidenhain
7 = Multi-turn High Resolution Heidenhain
BASE SPEED
4 = 200 rpm @ 440V
5 = 250 rpm @ 440V
6 = 375 rpm @ 440V
8 = 625 rpm @ 440V
9 = 750 rpm @ 440V
MAGNET STACKS
1 = One Stack
2 = Two Stacks
3 = Three Stacks
FRAME SIZE - Bolt Circle Diameter
290 = 290 mm
410 = 410 mm
VOLTAGE CLASS
A = 200V
B = 400V
HOUSING TYPE
B = Bearingless Housing
BULLETIN NUMBER
RD = Rotary Direct Drive Servo Motor

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4 RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions

ATTENTION

Before You Begin

Remove all packing material, wedges, and braces from within and around the item.
After unpacking, verify the nameplate catalog number against the purchase order.

1. Remove the motor carefully from its shipping container.

2. Visually inspect the motor frame, mounting pilot, and connectors for
damage.

3. Notify the carrier of any shipping damage immediately.

4. Retain the cardboard cover and protective paper sleeving from the mounting
end of the motor.

Magnetized material within the motor is exposed whenever the protective cover is
removed and before the motor is mounted.

Accidental entry of foreign material can harm motor performance.
Always cover the mounting end of motor immediately after removing the motor or its

protective cover. This will greatly reduce the possibility of magnetic or non-magnetic
particles accidentally entering the motor.

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RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions 5

Required Tools

These tools are needed to install this product.

Tools Required for Installation Value

Hex bit, 150 mm (6
Torque wrench Capable of applying at least 65 N•m (50 lb•ft)
Screwdriver Phillips #2
Micrometer N/A
Straight edge
Caliper
Runout indicator
Cleaning cloth
Shaft key (provided)

These additional tools are needed to remove this product.

Tools Required for Removal Value

M6 x 1 x 120 hex bolt or rod
(For RDB-B4103 motor only)

M10 and M12 hex bolts Qty 2 min
Flashlight N/A
Hammer

in.) minimum length 6 mm

Qty 1

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6 RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions

Prolonging Motor Life

Thoughtful design and proper maintenance can increase the life of this motor.
Follow these guidelines to maximize the life of the motor:

• Always provide a drip loop in each cable to carry liquids away from the

connection to the motor.

• If design requirements permit, provide shields that protect the motor

housing, shaft, seals, and their junctions from contamination by foreign
matter or fluids.

• Inspect the motor for damage or wear on a regular basis. If damage or

excessive wear is observed, replace the item.

Preventing Electrical Noise

ElectroMagnetic Interference (EMI), commonly called electrical noise, can reduce
motor performance. Effective techniques to counter EMI include filtering the AC
power, using shielded cables, separating signal cables from power wiring, and
practicing good grounding techniques.

Follow these guidelines to avoid the effects of EMI:

• Isolate the power transformers or install line filters on all AC input power

lines.

• Physically separate signal cables from motor cabling and power wiring.

Do not route signal cables with motor and power wires, or over the vent
openings of servo drives.

• Ground all equipment by using a single-point parallel ground system that

employs ground bus bars or large straps. If necessary, use additional
electrical noise reduction techniques to reduce EMI in noisy environments.

Refer to the System Design for Control of Electrical Noise Reference Manual,
publication GMC-RM001

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, for additional information on reducing the effects of EMI.

RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions 7

Build and Route Cables

Knowledgeable cable routing and careful cable construction improves system
performance.

Follow these guidelines to build and install cables:

• Keep wire lengths as short as physically possible.

• Route noise sensitive wiring (encoder, serial, I/O) away from input power

and motor power wiring.

• Separate cables by 0.3 m (1 ft) minimum for every 9 m (30 ft) of parallel

run.

• Ground both ends of the encoder cable shield and twist the signal wire

pairs to cancel electromagnetic interference (EMI) from other equipment.

WARNING

Do not tightly gather or coil the excess length of a power cable. Heat is generated within
a cable whenever power is applied. Always position a power cable so it may freely
dissipate any heat.

A power cable should not be coiled b
Design for Control of Electrical Noise Reference Manual, publication GMC-RM001
information on how to handle excess cable lengths.

Failure to observe these safety procedures could result in personal injury or equipment
damage.

y itself or with other power cables. Refer to System

, for

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8 RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions

SHOCK HAZARD

Shielded Signal Wires (one pair shown) within Power
Cable

Overall Power Cable Shield

Signal Wire Shield Contacts Overall Power
Cable Shield

Factory Supplied

Field Modified

All power and signal wire shields must connect to
machine ground.

Ground the Shielded Signal Wires within a Power Cable

Always ground the shield on any signal wires inside a power cable. Connecting this
shield to chassis ground reduces the potential for voltage inductance and EMI.

If any shield on a power cable is not grounded, high voltage can be present on that
shield.

Make sure there is a connection to ground for all shield wires inside a power cable, and
for the overall power cable shield.

Failure to observe safety precautions could result in personal injury or damage to
equipment.

To ground the shield wire on a 2090-CPBM7DF-xxAFxx or 2090-XXNPMF-xxSxx
power cable:

1. Loop the signal wire pair to the overall cable shield as shown in the
diagram.

• Cable 2090-CPBM7DF-xxAFxx (shown) contains one signal wire pair.

• Cable 2090-XXNPMF-xxSxx contains two signal wire pairs.

2. Clamp all signal wire shields and the overall power-cable shield in the
power cable (chassis) ground clamp on the drive.

Grounding of Signal Wire Shields in a Power Cable

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RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions 9

ATTENTION

ATTENTION

ATTENTION

Install the Motor

All motors include a mounting pilot for aligning the motor on the machine.
Preferred fasteners are hardened steel. The installation must comply with all local
regulations and use equipment and installation practices that promote safety and
electromagnetic compatibility.

Unmounted motors, disconnected mechanical couplings, loose shaft keys, and
disconnected cables are dangerous if power is applied.

Disassembled equipment should be appropriately identified (tagged-out) and access to
electrical power restricted (locked-out).

Before applying power to the motor, remove the shaft key and other mechanical couplings
that could be thrown from the shaft.

Failure to observe these safety precautions could result in personal injury.

Servo drive power must be turned off before connecting or disconnecting the cables to the
motor, and if a cable is left disconnected at the motor end.

Arcing or unexpected motion could occur if the feedback, power, or brake cables are
connected or disconnected while power is applied to the servo drive.

Failure to observe these safety procedures could result in personal injury or damage to the
motor and equipment.

Only an authorized Allen-Bradley repair center shall service this item. Refer to Rockwell
Automation Support for assistance to locate the nearest repair center.

Failure to observe safety precautions could result in personal injury or damage to
equipment.

Publication RDB-IN002B-EN-P — February 2010

10 RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions

BURN HAZARD

Preparing the Motor for Installation

Follow these steps to prepare a motor for installation.

1. Verify sufficient clearance, heatsink mass, and air flow for the motor so it
stays within the operating temperature range of 0…40 °C (32…104 °F).

Do not enclose the motor unless cooling air is forced across the motor, and
keep other heat producing devices away from the motor. Heatsink
requirements are listed in a footnote to the Specifications

Outer surfaces of a motor can reach high temperatures, 125 °C (275 °F), during operation.
Take precautions to prevent accidental contact with hot surfaces. Consider motor surface

temperature when selecting connections and cables to install on a motor.
Failure to observe safety precautions could result in personal injury or damage to

equipment.

2. Wipe the shaft and the rotor hub to remove excess grease or other
contaminants.

A light oil coating is acceptable.

table.

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