Allen-Bradley 1336S-EN4 42336-224-51 Original Spare 1336 PLUS

Product Overview

Allen-Bradley 1336S-EN4 42336-224-51 Original Spare: System Stability & Industrial Maintenance Value

The Allen-Bradley 1336S-EN4 42336-224-51 is an original spare component for the 1336 PLUS series AC Variable Frequency Drive (VFD), engineered by Rockwell Automation to deliver precise motor speed control in demanding industrial environments. For maintenance engineers managing aging automation infrastructure, sourcing a verified original spare — rather than an aftermarket substitute — is the single most effective way to eliminate compatibility risk, preserve system tuning parameters, and minimize unplanned downtime.

Whether your facility operates continuous process lines, conveyor systems, pump stations, HVAC drives, or multi-axis motion control cabinets, the 1336S-EN4 42336-224-51 provides a direct, drop-in replacement path that maintains the original electrical signature of your drive system. No firmware re-flashing, no parameter remapping, no re-commissioning delays — just a verified original part that restores your system to full operational specification.

Critical Technical Specs

Preventive Maintenance Strategy

A VFD replacement event is the ideal trigger for a broader control cabinet audit. When replacing the 1336S-EN4 42336-224-51, maintenance teams should simultaneously inspect the surrounding drive ecosystem to prevent cascading failures that often follow a primary drive fault.

Begin with the 1336-MOD-L2E or equivalent 1336 PLUS communication adapter module — these interface cards are frequently overlooked during drive swaps but carry accumulated thermal stress from years of continuous operation. If your system uses DeviceNet or DH+ communication, verify the adapter’s firmware revision matches the replacement drive’s expected protocol stack.

Next, inspect the 1336-PB power base and associated DC bus capacitors. Electrolytic capacitors in VFD power stages have a finite service life, typically 7–10 years under rated load. A drive module replacement paired with aged capacitors is a common cause of repeat failures within 6–18 months. Proactive capacitor inspection or replacement during the same maintenance window dramatically extends the effective service interval.

The 1336-GM1 gate driver board and associated IGBT modules should be visually inspected for carbon tracking, thermal discoloration, or cracked solder joints — all indicators of impending failure. If the drive has experienced repeated overcurrent trips, the gate driver is a high-probability secondary failure point.

For facilities running 1336 PLUS drives in multi-drive cabinets, the 1336-BRF dynamic braking resistor module and associated thermal overload relay should be tested for resistance drift and contact integrity. Braking resistors that have degraded beyond tolerance will cause DC bus overvoltage faults on the replacement drive, creating a false impression of a defective spare.

Control power supply integrity is equally critical. The 1606-XLP or equivalent 24VDC SMPS modules powering the drive’s control logic board should be load-tested. A control supply with marginal output voltage under load will cause intermittent drive faults that are extremely difficult to diagnose without isolating the power source. Stocking a spare 24VDC power module alongside the drive spare is a low-cost insurance policy with high diagnostic value.

I/O wiring integrity at the 1492-IFM interface module or equivalent terminal block assembly should be verified — loose or corroded terminals at the analog speed reference input (0–10V or 4–20mA) are a frequent source of erratic speed control after a drive replacement. Re-torque all control terminals and inspect for insulation degradation on signal cables routed near high-voltage conductors.

Finally, if your 1336 PLUS system interfaces with a 1747-SN SLC 500 remote I/O scanner or a 1756-DNB ControlLogix DeviceNet bridge, verify the node address configuration and baud rate settings are documented before the replacement drive is powered up. Restoring these parameters from a documented baseline eliminates the most common post-replacement commissioning delays.

Strategic Replacement Solutions

The 1336 PLUS series has been in service across global manufacturing facilities for over two decades. While Rockwell Automation has transitioned its current VFD portfolio to the PowerFlex 400, PowerFlex 525, and PowerFlex 755 families, many facilities continue to operate 1336 PLUS drives because the cost and complexity of a full system migration — including motor re-sizing, cable replacement, PLC program modification, and operator retraining — far exceeds the cost of maintaining a strategic spare parts inventory.

The 1336S-EN4 42336-224-51 enables a direct replacement strategy that preserves the original system architecture. There is no need to modify the PLC program, reconfigure the HMI, or retrain operators. The replacement drive accepts the same parameter set as the original, and in most installations can be commissioned in under two hours by a qualified drive technician.

For facilities managing multiple 1336 PLUS drives across different horsepower ratings, a tiered spare parts strategy is recommended: maintain one complete drive spare per critical application (e.g., main conveyor, primary pump), and supplement with a shared pool of common sub-assemblies — control boards, communication adapters, and gate driver modules — that can be cross-utilized across multiple drive frames. This approach reduces total spare parts investment while maintaining rapid response capability for the highest-criticality assets.

All units supplied by TOPNLMS are tested under load conditions prior to shipment, serialized, and shipped with a 12-month warranty covering manufacturing defects and functional failure. Each unit is packaged in anti-static ESD-safe materials with foam cushioning to prevent transit damage.

Support FAQ

Q1: Is the 1336S-EN4 42336-224-51 a new original part or a refurbished unit?
All units are sourced as original Allen-Bradley / Rockwell Automation components. Condition (new surplus or factory-refurbished) is confirmed at the time of order. Each unit undergoes functional testing prior to shipment and is covered by a 12-month warranty regardless of condition grade.

Q2: How do I verify compatibility with my existing 1336 PLUS installation?
Compatibility is confirmed by matching the full part number — including the suffix (42336-224-51) — against your existing drive’s nameplate data. If you have the original drive’s catalog number and firmware revision, our technical team can cross-reference compatibility before shipment. Provide your existing drive’s nameplate photo via email for a pre-purchase compatibility check.

Q3: What is the typical lead time and shipping process?
In-stock units ship within 1–3 business days via DHL, FedEx, or EMS with full tracking. International shipments to most destinations arrive within 5–10 business days. Express options are available for emergency maintenance situations. All shipments include a packing list, test report, and warranty certificate.

Q4: What does the 12-month warranty cover, and what is the claims process?
The 12-month warranty covers functional failure and manufacturing defects under normal operating conditions. It does not cover damage caused by incorrect installation, overvoltage events, or physical mishandling. To initiate a warranty claim, contact us with the order number, a description of the fault, and any available fault codes from the drive display. Replacement or repair is arranged within 5 business days of claim verification.