Allen-Bradley 1336S-EN4 42336-221-51 Replacement for 1336 PLUS II

Product Overview

Allen-Bradley 1336S-EN4 42336-221-51 Replacement for 1336 PLUS II: Seamless Drive System Transition

The Allen-Bradley 1336S-EN4 42336-221-51 is a language module designed for the 1336 PLUS II AC drive series — one of Rockwell Automation’s most widely deployed variable frequency drive platforms in industrial automation. As the 1336 PLUS II series approaches end-of-life and spare parts become increasingly scarce, facilities running legacy conveyor systems, pump stations, HVAC control panels, and motor control centers (MCCs) face growing pressure to source verified replacement modules before unplanned downtime occurs.

This listing provides a direct, tested replacement for the 1336S-EN4 42336-221-51 language module. The module interfaces directly with the 1336 PLUS II drive’s internal communication bus, enabling operator interface language selection and HMI display compatibility. It is a plug-in card that installs into the designated option slot on the drive chassis without requiring rewiring of the main power terminals or modification of the existing control wiring harness.

For facilities managing a fleet of 1336 PLUS II drives — including the 1336F (PLUS), 1336T (PLUS), and 1336E (IMPACT) variants — the language module is a shared spare that can be stocked across multiple drive frames. Engineers migrating from older 1336 PLUS (first-generation) drives to the PLUS II platform will find that the option card slot architecture is preserved, simplifying the upgrade path without requiring a full drive replacement or panel redesign.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful 1336 PLUS II drive modernization project rarely involves a single component. When replacing the 1336S-EN4 42336-221-51 language module, maintenance teams and system integrators typically address the broader drive health at the same time. The 1336-MOD-L2 and 1336-MOD-L3 option modules are commonly evaluated alongside the language card, as they govern I/O expansion and analog reference inputs on the same drive chassis.

For sites where the 1336 PLUS II drives communicate over a DeviceNet or Remote I/O (RIO) network, the 1336-GM1 (DeviceNet adapter) and 1336-GM6 (Remote I/O adapter) option cards are frequently replaced as part of the same maintenance window. These communication modules share the same option slot architecture as the language module, and their replacement follows an identical plug-in procedure — no changes to the PLC program in the upstream Allen-Bradley SLC 500 or ControlLogix controller are required when swapping like-for-like modules.

In control panels where the 1336 PLUS II drives are mounted alongside 1336-PB power brake modules or 1336-BRF dynamic braking resistor assemblies, the language module replacement is typically scheduled during the same planned outage to minimize total downtime. Facilities running PanelView 550 or PanelView 900 HMI terminals connected to the drive via DH-485 will find that the language module swap has no impact on the HMI communication link, as that interface is handled by a separate 1336-GM4 (DH-485) adapter module.

For engineers planning a longer-term migration from the 1336 PLUS II platform to the PowerFlex 700 or PowerFlex 40 series, the language module replacement serves as a cost-effective bridge strategy — restoring full drive operability while the capital budget for a full drive replacement is approved. The PowerFlex 700 uses a different option card architecture (20-COMM-D for DeviceNet, 20-COMM-E for EtherNet/IP), but the control wiring terminal layout is similar enough that panel retrofit time is minimized. During the transition period, stocking the 1336S-EN4 42336-221-51 as a verified spare ensures that production continuity is maintained without committing to a full system overhaul prematurely.

Retrofit Guidance FAQ

Q: Does replacing the 1336S-EN4 42336-221-51 require any changes to the drive’s parameter settings?
A: No. The language module is a display and interface component only. Drive parameters are stored in the drive’s internal EEPROM and are not affected by removing or replacing the language module. After installation, the drive will resume normal operation with all previously configured parameters intact.

Q: Is the 1336S-EN4 42336-221-51 compatible with all frame sizes of the 1336 PLUS II?
A: Yes. The language module is compatible across all standard frame sizes of the 1336 PLUS II series (Frame A through Frame F). The option card slot is physically identical across frames, and no adapter bracket or spacer is required.

Q: Can this module be used in a 1336 PLUS (first-generation) drive?
A: The 1336 PLUS II option card slot is mechanically similar to the first-generation 1336 PLUS, but firmware and bus protocol differences mean cross-generation compatibility cannot be guaranteed. We recommend confirming the exact drive catalog number before ordering.

Q: What communication protocols does the 1336 PLUS II support alongside this language module?
A: The 1336 PLUS II supports DeviceNet, Remote I/O, DH-485, and ControlNet via separate communication adapter modules. The language module operates independently of the network adapter and does not affect protocol selection or network configuration.

Q: How long does installation take in the field?
A: Typical installation time is under 15 minutes for a trained technician. The module is a plug-in card — power down the drive, discharge the bus capacitors per Rockwell safety procedures, remove the existing module, seat the replacement, and restore power. No special tools or programming software are required.

Q: Is this a new or refurbished unit?
A: All units are inspected and tested prior to shipment. Condition is clearly stated in the product listing. Both new-surplus and professionally refurbished units are available — contact us to confirm current stock condition before ordering.

Warranty Assurance

Every 1336S-EN4 42336-221-51 shipped from TOPNLMS carries a 12-month warranty from the date of delivery. Prior to shipment, each unit undergoes a functional inspection covering visual integrity, connector condition, and board-level verification. Units that do not pass inspection are not shipped.

In the event of a warranty claim, TOPNLMS provides a direct replacement or full refund — no lengthy RMA queues or third-party repair loops. Our response target for warranty inquiries is within 1 business day. Replacement units are dispatched from our Xiamen warehouse, with express shipping options available for urgent production-down situations.

For procurement teams requiring documentation, we can provide a test report, packing list, and commercial invoice with each shipment. Export packaging is designed for international air freight and sea freight, with anti-static protection and moisture-barrier sealing as standard.

We maintain standing stock of high-demand 1336 PLUS II spare parts to support just-in-time procurement. If you require a quantity commitment or a blanket order arrangement for ongoing maintenance contracts, contact our sales team to discuss pricing and lead time.