Allen-Bradley 1336 PLUS II Modules: AB 1336S-EN4-42336-221-51

Technical Dossier

Product Details And Specifications

Allen-Bradley 1336 PLUS II Series Technical Notes

The Allen-Bradley (Rockwell Automation) 1336 PLUS II series is a general-purpose AC drive platform deployed across the full spectrum of heavy industrial operations — including petrochemical refineries, nuclear power auxiliary systems, offshore platforms, pulp and paper mills, and large-scale water treatment facilities. With a power range spanning 0.37 kW to 448 kW (0.5 HP to 600 HP), the 1336 PLUS II established itself as a standard-bearer for variable frequency drive (VFD) control in process-critical environments where uptime is non-negotiable. Its modular architecture — separating the base drive from option boards, communication adapters, and human interface modules — allowed plant engineers to configure drives precisely to application requirements without over-specifying hardware. Installed base counts in the hundreds of thousands of units globally, making the 1336 PLUS II one of the most widely maintained legacy drive platforms in industrial automation history.

The Evolution of 1336 PLUS II Architecture

The 1336 PLUS II succeeded the original 1336 PLUS (catalog prefix 1336F) in the mid-1990s, introducing a redesigned control board architecture with enhanced noise immunity, expanded option board slots, and support for DeviceNet and ControlNet communication adapters — protocols that were becoming standard in Rockwell's Integrated Architecture strategy. The drive's control platform is built around a dedicated DSP for PWM generation and a separate microprocessor for parameter management and communications, a dual-processor design that improved fault diagnostics and reduced response latency in closed-loop applications.

The 1336 PLUS II supports both volts-per-hertz (V/Hz) and sensorless vector control modes, with an optional encoder feedback board enabling full closed-loop flux vector control. This flexibility made it suitable for both simple conveyor applications and demanding positioning or tension-control systems. The series was officially transitioned to End of Life (EOL) by Rockwell Automation, with the PowerFlex 700 and PowerFlex 753/755 series designated as the primary migration paths. Despite EOL status, the 1336 PLUS II remains in active service at thousands of facilities where capital replacement projects have been deferred, creating sustained demand for spare modules, option boards, and replacement parts.

1336 PLUS II Full Catalog & Functionalities (SKU List)

The following SKUs represent the core module range of the 1336 PLUS II platform, organized by functional category. All models listed are genuine Allen-Bradley catalog numbers.

Language & Human Interface Modules

• 1336S-EN4-42336-221-51: Language module providing localized parameter display and operator interface text for 1336 PLUS II drives; supports multi-language firmware overlays.
• 1336-MOD-KB: Full-numeric keypad human interface module (HIM) with parameter access, fault history display, and drive control capability.
• 1336-MOD-N1: Remote HIM mounting kit enabling panel-door mounting of the 1336 PLUS II operator interface up to 3 meters from the drive chassis.

Communication Adapter Modules

• 1336-GM1: DeviceNet communication adapter; integrates the 1336 PLUS II into a DeviceNet network for parameter read/write and I/O control via explicit and polled messaging.
• 1336-GM2: ControlNet communication adapter; provides scheduled and unscheduled messaging on ControlNet for integration with PLC-5 and SLC 500 controllers.
• 1336-GM3: Remote I/O (RIO) adapter; connects the 1336 PLUS II as a discrete I/O rack on an Allen-Bradley Remote I/O network, compatible with PLC-5 and SLC 500 systems.
• 1336-GM6: Profibus DP communication adapter; enables integration into Siemens and third-party Profibus DP networks for parameter and control data exchange.
• 1336-GM7: Interbus-S communication adapter for 1336 PLUS II drives deployed in Phoenix Contact Interbus-S network architectures.

I/O Option Boards

• 1336-MOD-G1: Analog I/O expansion board; adds two additional analog input channels (0–10 VDC or 4–20 mA) and one analog output channel for process feedback integration.
• 1336-MOD-G2: Digital I/O expansion board; provides six additional digital inputs and three digital outputs for extended control logic without external relay panels.
• 1336-MOD-G3: Encoder feedback option board; accepts quadrature encoder signals (5 VDC or 12 VDC) for closed-loop speed regulation and flux vector control mode.
• 1336-MOD-G4: Pulse tachometer input board; accepts pulse-type speed feedback signals from magnetic pickup sensors for closed-loop control in legacy tachometer installations.

Power & Precharge Boards

• 1336-BDB-SP2C: Base drive board assembly for 1336 PLUS II; core control PCB containing the drive's primary DSP, parameter memory, and I/O interface circuitry.
• 1336-BDB-SP37D: Drive board assembly variant for mid-range power frame sizes; includes updated gate driver circuitry for improved IGBT switching reliability.
• 1336-BDB-SP67D: Drive board assembly for high-power frame configurations; supports drives in the 75–448 kW range with enhanced thermal management interface.
• 1336-PB-SP2A: Precharge board assembly; manages DC bus precharge sequencing to limit inrush current during drive power-up, critical for protecting rectifier and capacitor bank assemblies.

Capacitor & Power Supply Assemblies

• 1336-L6: DC bus capacitor bank assembly for frame size D drives; direct replacement for aging electrolytic capacitors in 1336 PLUS II drives with extended service life.
• 1336-L7: DC bus capacitor bank assembly for frame size E drives.
• 1336-L8: DC bus capacitor bank assembly for frame size F drives; high-capacitance bank for drives in the 90–160 kW range.
• 1336-QC-SP1: Internal power supply board; provides regulated 5 VDC, 15 VDC, and 24 VDC rails to the 1336 PLUS II control board and option boards.

Snubber & Gate Driver Assemblies

• 1336-R1-SP6A: Gate driver board assembly; interfaces the control DSP with the IGBT power module, providing isolated gate drive signals and desaturation fault detection.
• 1336-SN-SP2A: Snubber board assembly for frame size B/C drives; suppresses voltage transients across IGBT modules to extend power semiconductor service life.
• 1336-SN-SP6A: Snubber board assembly for frame size D/E drives; higher-rated snubber network for mid-to-large frame 1336 PLUS II configurations.

Quality Control for the 1336 PLUS II Range

The 1336 PLUS II's backplane and option board bus architecture requires functional validation beyond simple visual inspection. DriveKNMS applies a structured test protocol to all 1336 PLUS II modules prior to shipment: