Category: Industry Trends

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.

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.

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.

Allen-Bradley also offers high flex-rated cable for power-track

applications. Power cables (catalog number 1326-CPB1T and 1326-

CPC1T) and commutation cables (catalog number 1326-CCUT and

1326-CECUT) are available in lengths up to 90 m (295 ft). In addition

to the features listed for standard cables, each flex-cable features

excellent minimum bend radius ratings and a superior flex cycle life.

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.

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

• Precision balance of 0.0005” (0.0127 mm) total peak-peak displacement.

• Vertical shaft up or down mounting.

• TENV construction.

• IP65 rated (when used with the Shaft Seal option) to withstand harsh environments. 

Identify Module Features

Refer to the following figure to identify the hardware components of the 56AMXN/B module.

The module has:

• A label to indicate that it is a scanner for AutoMax

DCSNet and remote I/O

• A 4-character scrolling display (XXXX)

• 3 LEDs, labelled NET, CLX, and OK, to indicate the

status of the network, the connection to the ControlLogix processor, and its own internal state

• a 9-pin D-shell connector to connect to the DCS or remote I/O network

• switches at the top of the module to set the mode of operation and the drop number and drop depth

For example, to configure the 56AMXN/B as a DCS slave with drop number 17,

drop depth 5, set the switches to 0, 5, 1, and 7 from left to right.

Any other settings are invalid and result in the module going into “Thumbwheel

test” mode. In thumbwheel test mode, the display shows the current switch settings.

It doesn’t go out of thumbwheel test mode until you cycle power.

In thumbwheel test mode, the 56AMXN/B initially displays “Thumb Test Mode”

on the 4-character display, displays the switch settings for 5 seconds, then resumes

displaying “Thumb Test Mode”

For DCS slave operation, if the drop number and drop depth are individually valid

but the combination results in invalid drop numbers (for example, drop number 55,

drop depth 2), the module displays an error message on the 4-character display but

does not enter Thumbwheel test mode.

Prepare the Chassis for Module Installation

Before you install the 56AMXN/B module, you must install and connect a

ControlLogix chassis and power supply.