Product Description

Model Definition

• 1326AB: Product series, high‑performance AC servo motor platform.

• B: Frame size, 5.88 in (149 mm) diameter.

• 430: Power and stack length code, 1.4 kW rated power.

• E: Maximum speed, 3000 rpm at 460 VAC.

• 21: Mounting and shaft, IEC metric flange with metric keyway shaft.

• K4: 24 VDC holding brake, 8.1 N·m (72 lb‑in) holding torque.

• L: Special modification (e.g., extended cable, special connector, or coating).

Technical Specifications

• Manufacturer: Allen‑Bradley (Rockwell Automation)

• Type: Brushless three‑phase AC permanent magnet synchronous servo motor

• Rated power: 1.4 kW (1.88 HP)

• Input voltage: 380–460 VAC, three‑phase, 50/60 Hz

• Rated speed: 2500 rpm (380 VAC), 3000 rpm (460 VAC)

• Rated torque: 5.8 N·m (51.3 lb‑in)

• Stall torque: 8.1 N·m (72 lb‑in), 100% continuous at zero rpm

• Feedback: Brushless resolver (standard), no onboard electronics

• Brake: 24 VDC holding brake, 8.1 N·m holding torque

• Insulation class: Class F (155 °C)

• Protection rating: IP65 (with shaft seal), TENV (totally enclosed non‑ventilated)

• Frame: Aluminum housing, IEC metric flange, 149 mm diameter

• Temperature range: 0 °C to +40 °C, 5%–95% RH (non‑condensing)

• Precision balance: 0.0127 mm total peak‑peak displacement

• Status: Discontinued legacy product.

Interface and Communication Configuration

• Power connection: Terminal block for three‑phase AC power (U, V, W) and ground.

• Feedback interface: Resolver connector (standard) for position, commutation, and speed signals.

• Brake connection: Separate 24 VDC DC terminals for brake coil control.

• Mechanical interface: IEC metric flange, keyway shaft, threaded shaft hole for safety devices.

• Control compatibility: Works with Allen‑Bradley 1391, 1394, Ultra, and Kinetix servo drives.

• Signal isolation: Basic isolation on power and feedback ports for noise immunity.

• Cable entry: Top‑mounted junction box for power and feedback cables.

Core Functions

• High‑precision speed and position control: Smooth operation at low speeds with sinusoidal stator winding.

• High torque at low speed: 100% continuous stall torque for static load holding.

• Rugged feedback: Brushless resolver provides reliable position/speed data in harsh environments.

• Integrated holding brake: 24 VDC brake secures load during power loss or idle states.

• Thermal protection: Built‑in thermal switch triggers on overheating to protect windings.

• Precision dynamics: Fast response, low cogging, and consistent torque across speed range.

• Vertical mounting capability: Can be installed shaft‑up or shaft‑down.

Application Scenarios

• Machine tools: CNC mills, lathes, grinders requiring precise axis control.

• Automation lines: Packaging, material handling, assembly, and robotic systems.

• Textile/printing: High‑speed winding, cutting, and registration applications.

• Food and beverage: Conveyors, fillers, and packaging machinery in washdown environments.

• Legacy system upgrades: Replacement for older 1326AB motors in existing Allen‑Bradley servo systems.

• Harsh environments: Dust, moisture, and moderate vibration conditions (IP65).

Usage and Maintenance Instructions

Usage

1. Installation: Mount motor on rigid, flat surface; allow 100 mm clearance around housing for cooling.

2. Wiring: Connect three‑phase power, resolver feedback, and 24 VDC brake cables; tighten terminals and ground properly.

3. Alignment: Align shaft with load; use flexible coupling to avoid misalignment and mechanical stress.

4. Parameter setup: Configure drive for resolver feedback, motor parameters, and brake control logic.

5. Commissioning: Jog motor to check rotation direction; run at low speed to verify smooth operation and no abnormal noise.

6. Brake operation: Ensure brake releases when motor is enabled and engages on power loss.

Maintenance

1. Inspection: Every 3–6 months check housing, flange, cables, and connectors for damage or wear.

2. Cleaning: Disconnect power; wipe housing with dry cloth; clean junction box and cable entries.

3. Torque check: Annually retighten power and feedback terminals to manufacturer torque specs.

4. Resolver check: Verify resolver wiring and connector integrity; test signal quality with drive diagnostics.

5. Brake maintenance: Inspect brake coil and friction surfaces; test holding torque periodically.

6. Bearing lubrication: Sealed bearings are maintenance‑free; replace if noise or vibration increases.

7. Storage: Keep spare motors in cool, dry, anti‑static area; protect shafts and connectors.

8. Repair: Only qualified technicians should disassemble or repair the motor; use genuine Allen‑Bradley parts.