RFI Filtering

1336 PLUS II drives can be installed with an RFI filter, which controls radio-frequency conducted emissions into the main supply lines and ground wiring.

If the cabling and installation recommendation precautions described in this manual are adhered to, 

it is unlikely that interference problems will occur when the drive is used with conventional industrial elec

tronic circuits and systems. However, a filter may be required if there is a likelihood of sensitive devices or circuits being installed on the same AC supply.

Where it is essential that very low emission levels must be achieved or if conformity with standards is required the optional RFI filter must be used. 

Refer to Appendix C and instructions included with the filter for installation and grounding information.

Grounding

Refer to the grounding diagram on page 2–13. 

The drive must be connected to system ground at the power ground (PE) terminal provided on the power terminal block (TB1). 

Ground impedance must conform to the requirements of national and local industrial safety regulations (NEC, VDE 0160, BSI, etc.) and should be inspected and tested at

appropriate and regular intervals.

In any cabinet, a single, low-impedance ground point or ground bus bar should be used. 

All circuits should be grounded independently and directly. 

The AC supply ground conductor should also be connected directly to this ground point or bus bar.

Electrical Interference – EMI/RFI

Immunity

The immunity of 1336 PLUS II drives to externally generated interfer ence is good. 

Usually, no special precautions are required beyond the installation practices provided in this publication.

It is recommended that the coils of DC energized contactors associ ated with drives be suppressed with a diode or similar device, 

since they can generate severe electrical transients.

Emission

Careful attention must be given to the arrangement of power and ground connections to the drive to avoid interference with nearby sen

sitive equipment. The cable to the motor carries switched voltages and should be routed well away from sensitive equipment.

The ground conductor of the motor cable should be connected to the drive ground (PE) terminal directly. 

Connecting this ground conductor to a cabinet ground point or ground bus bar may cause high frequency current to circulate in the ground system of the enclosure. 

The motor end of this ground conductor must be solidly connected to the motor case ground.

Shielded or armored cable may be used to guard against radiated emissions from the motor cable. 

The shield or armor should be connected to the drive ground (PE) terminal and the motor ground as outlined above.

Common mode chokes at the drive output can help reduce commonmode noise on installations that do not use shielded cable. 

Common mode chokes can also be used on analog or communication cables.

Servo Motor Options

Options available for the 1326AB 460V AC Torque Plus Series include (the option code or catalog number is in parenthesis):

• Integral Spring-Set Holding Brakes with 24V DC coils (-K4, -K5, -K7).

• A Shaft Oil Seal kit, (1326AB-MOD-SSV-xx) for installing a Viton shaft oil seal on a motor in the field. Motor disassembly is not required.

When the shaft oil seal is installed, the motor is dust tight, able to withstand pulsating water jets, and meet the IP65 requirements of the IEC 529 standard.

Important: IP67 (-L) servo motors have a factory-installed shaft oil seal and do not require the Shaft Oil Kit option.

• Secondary Feedback Mounting Kits (1326AB-MOD-Mxx) for installing an Allen-Bradley Encoder (845H) in the field.

Note: Not available for high-resolution motors.

If you are using a 1326AB-Bxxx Servo Motor with a 1394 Servo System you do not need to mount a secondary encoder because the 1394 derives A Quad B

feedback output (2048 ppr) from the motor feedback.

Important: 1326AB servo motors lose the IP65 or IP67 rating when an externally mounted encoder package is used.

• IP67 (-L) servo motors. The IP67 rating (IEC 529) provides environmental protection from the effects of temporary immersion in water.

Important: 1326AB servo motors lose the IP67 rating when the externally mounted encoder or the junction box kit options are used.

• A Junction Box Kit (1326AB-MOD-RJxxx) with axially-mounted connectors is available with either front or rear exit connections. 

Right-angle connector cables are also available (refer to 1326 Cables for 460V AC Servo Motors, publication 1326A-2.11). 

The junction box allows the motor connectors to be brought out axially (rather than radially) to the motor without further wiring.

Important: 1326AB servo motors lose the IP67 rating when the junction box kit option is used.

Feedback Options

1326AB servo motors are available with either resolver (standard) or high-resolution encoder feedback devices. 

Resolver-based servo motors feature:

• A rugged, brushless resolver that provides accurate position feedback, eliminates the need for on-board electronics and can

withstand harsh shock, high operating temperatures, and vibration.

• Resolver feedback generates (2048ppr) A quad B encoder output.

High-resolution servo motors are available in single or multi-turn configurations that provide high-resolution encoder feedback for

applications requiring precise tolerance:

• Single-turn (-S) configuration provides precise machine positions of two million counts per revolution.

• Multi-turn (-M) configuration provides accurate absolute machine positions over multiple revolutions (no batteries needed) to eliminate machine re-homing on

power-up. It provides one million counts of feedback per revolution and absolute positioning within 4,096 revolutions.

• Both configurations feature on-board EEProm memory for storing motor configuration information.

Important: High-resolution feedback can only be used with the 9/440 high-resolution feedback CNC.

Each servo motor features:

• Special flux profile permanent magnets engineered by Allen Bradley to increase servo response.

• A three-phase, sinusoidal-wound stator field for smooth operation at low speeds.

• TENV construction. IP65 is standard. IP67 (-L) option is available with optional shaft seal (1326AB-MOD-SSV-xxx) installed.

• An extruded aluminum housing for improved heat transfer.

• 100% continuous-rated output torque at stall (zero rpm).

• A UL Listed insulation system (file #E57948).

• The ability to be vertically mounted at any angle with the shaft up or down.

• A normally closed thermal switch in the motor winding (rated 115V AC/ 24V DC at 1A) that provides thermal overload indication.

• A precision balance of 0.0127 mm (0.0005 in.) total peak-to-peak displacement.

• A CEI/IEC 72-1 metric flange mount with metric shafts.

• A threaded hole on the face of the shaft for securing couplings.

Product Data

This publication provides product information about the 2.3 to 53.0 N-m (20.7 to 469.0 lb-in.) 1326AB 460V Torque Plus Series, AC Servo Motors. 

This publication includes:

• Detailed lists of the features and options available for 1326AB 460V, Torque Plus Series, AC Servo Motors

• Tables that show how to determine the catalog numbers for the motors and options you need

• Performance data and speed-torque curves for all 1326AB 460V Torque Plus Series, AC Servo Motors

• Servo motor dimensions

• Details on holding brakes, shaft oil seal kits, encoder mounting adapters and junction boxes

• High-resolution feedback motors

Servo Motor Description

Torque Plus motors feature a specially engineered housing that reduces motor length and increases continuous torque ratings. 

These high performance, three-phase, brushless, AC, synchronous servo motors are designed by Allen-Bradley to meet the stringent

requirements of high performance motion systems. This series of 460V, AC servo motors is intended to be used with the Allen-Bradley

1394 Motion Control System.

Connection Solutions

Several accessories are available with 460 volt 1326 cables. This

section highlights the most common application used with each

accessory, including:

• Right-angle connection.

• CE-compliant in-line connection.

• Remote in-line connection.

• Harsh environment connection.

• Double-ended bulkhead in-line connection.

Right-Angle Connection

This solution provides a low-profile right-angle connection at the motor

Linear-flex is defined as flex in one direction. The flex-rated cable is

not rated for twist-flex, which is flex in two directions. Power track

(linear-flex) cabling must not be used in twist applications.

Standard Allen-Bradley cables—1326-CCU-xxx for commutation and

1326-CPB1-xxx or 1326-CPC1-xxx for power—are tray-rated

(stationary) and should only be used for one-time flex applications.

• Power track cabling is required for applications where dynamic

linear flexing occurs. Use the following cables for these applications:

• 1326-CCUT-xxx (commutation for all motors)

• 1326-CPB1T-xxx (power for 1326AS-B3xxx and 1326AS-B4xxx motors)

• 1326-CPC1T-xxx (power for 1326AS-B6xxx and 1326AS-B8xxx motors)

Servomotor Cable

Series B Power cables (catalog number 1326-CPB1 and 1326-CPC1)

and commutation cables (catalog number 1326-CCU and 1326-

CECU) are available in lengths up to 90 m (295 ft) for standard, one

time flex applications. (PLTC 90° C 300V, AWM 90° C 300V for

1326-CCU and 1326-CECU, type TC 90° C 600V for 1326-CPB1

and 1326-CPC1.) Each cable features:

• UL Listed (file #E88699) cable assemblies.

• A braided cable shield for superior electromagnetic noise immunity.

• Molded push/pull connectors at the motor end for easy installation and maintenance.

Cable systems for 1394 Motion Control System:

• Standard single-connector cables.

• Right-angle connector cables.

• In-line system that uses bulkhead and double-ended cables.

• Harsh environment cables.

• High-resolution feedback cables.

Servomotor Options

Options available for the 1326AB include (option code designation or

catalog number in parenthesis):

• Integral spring-set holding brakes with 90V DC coils (-A4, -A5, -A7) or

24V DC coils (-K4, -K5, -K7).

• Brake Power Supply (1326-MOD-BPS) converts 115V AC to the

voltage needed for 90V DC brakes (-A4, -A5 and -A7).

• Shaft Oil Seal kits (1326AB-MOD-SSV-xx) for field installation of

Viton shaft seals. Motor disassembly is not required.

• NEMA Inch (-11) or IEC metric flange mount (-21) with metric shafts.

• Resolver Feedback Packages (1326AB-MOD-Vxxxx) provide 4.25”

(108 mm) transducers which offer absolute/vernier or single brushless

resolver feedback for use with Allen-Bradley 8600GP, IMC rack and S Class motion controllers.

• Junction Box Kit (1326AB-MOD-RJxx) available with axially mounted

connectors. Connector version allows the motor connectors to be

brought out axially to the motor (rather than radially) without further wiring.

• Secondary Feedback Mounting Kits (1326AB-MOD-Mx) for field

installation of an Allen-Bradley Encoder (845H) or resolver. Using a

1326AB motor with a 1391B-ES (or 1391-DES) with A Quad B

feedback (up to 2048 ppr) eliminates the need for encoder mounting.

• Blower Cooling Kit (1326AB-MOD-G3, G4) provides air over cooling

for up to 35% more torque output on most 1326AB “C” frame motors.

The kit can be field mounted on the rear of 1326AB-Cxx motors (in

cluding motors with brakes). For motors using secondary motor

mounted feedback (1326AB-MOD-M60), use option “G4.”

• Cables for power (1326-CPxx . .) and feedback (1326-CFx . . – com

mutation, 1326-CEx . . – encoders) are available in lengths up to 100 ft

.(30 m) for standard and high flex applications Power (1326ES-CPxx . .)

and commutation (1326ES-CFx . .) cables over 100 ft. (30 m), up to 300

ft. (90 m) are available when using 1391B-ES or 1391-DES drives only.

Basic Servomotor Description

The 1326AB Servomotors are a family of high performance, three-phase,

brushless AC synchronous motors designed by Allen-Bradley to meet the

stringent requirements of servo system applications. This series of standard

AC servomotors can be used with 1391 AC Servo Controllers. The perfor

mance parameters of these motors with selected amplifiers are listed on

page 8. The typical speed-torque curves (see page 9) depict the opera

tional envelope of these motor and controller combinations.

Each motor has the following standard features:

• Permanent magnet rotor for increased servo response.

• Three-phase sinusoidal wound stator field for direct transfer of heat to

ambient, and smooth operation at low speeds.

• Brushless resolver supplies position, commutation & velocity feedback

information. This also provides durability in harsh environments by not

having on-board electronics in the motor. 1391 A Quad B (optional)

encoder output (up to 2048 ppr) is generated via resolver feedback.