Allen-Bradley 1336F-BRF75-AE-DE Replacement for 1336 PLUS II

Product Overview

Allen-Bradley 1336F-BRF75-AE-DE Replacement/Upgrade Solution for 1336 PLUS II: Seamless Transition from Legacy AC Drive Systems

The Allen-Bradley 1336F-BRF75-AE-DE is a 75HP (55kW) AC Variable Frequency Drive from the Rockwell Automation 1336 PLUS II series — one of the most widely deployed VFD platforms in industrial automation over the past three decades. As the 1336 PLUS II series has reached end-of-life status, facilities running legacy motor control systems face increasing pressure to source verified replacement units or plan structured migration paths to maintain production continuity. TOPNLMS supplies tested, ready-to-ship 1336F-BRF75-AE-DE units with full 12-month warranty coverage, supporting both direct drop-in replacement and phased system modernization strategies.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful 1336F-BRF75-AE-DE replacement rarely involves the drive alone. In most retrofit and modernization projects, the surrounding system components must be evaluated and — where necessary — replaced or upgraded in parallel to ensure full compatibility and reliable operation.

For facilities migrating from earlier 1336 PLUS revisions, the existing 1336-MOD-L2 Remote I/O communication adapter or 1336-GM1 DeviceNet communication module can typically be reused if in good condition, eliminating the need for PLC program changes related to the communication layer. Where the control cabinet includes a 1336-HIM-A3 or 1336-HIM-A4 Human Interface Module, parameter sets stored on HIM memory cartridges can be transferred directly to the replacement drive, significantly reducing commissioning time on the plant floor.

Power delivery to the 1336F-BRF75-AE-DE must be verified at the panel level. Many aging control cabinets running 75HP drives were originally designed around 1321-3R75-B line reactors for harmonic mitigation — these should be inspected and retained or replaced as part of the upgrade to protect the new drive from upstream voltage disturbances. Similarly, 1321-M075 motor reactors on the output side help protect motor windings when long cable runs are involved, a common scenario in pump and fan applications.

For sites where the PLC controlling the 1336 PLUS II is itself approaching obsolescence — particularly those running Allen-Bradley SLC 500 or PLC-5 controllers — the drive replacement can serve as the first step in a broader migration toward ControlLogix or CompactLogix platforms. In such cases, the Remote I/O (RIO) network connecting the legacy PLC to the drive may need to be bridged using a 1756-DHRIO ControlLogix communication module, allowing the new controller to communicate with existing 1336 PLUS II drives during a phased cutover without requiring simultaneous replacement of all field devices.

Terminal block wiring at the drive’s control I/O connector (TB3) follows the standard 1336 PLUS II pinout, meaning existing field wiring for start/stop, speed reference (0–10V or 4–20mA), fault relay, and digital inputs can be reconnected without modification. Where signal isolation is required between the PLC analog output and the drive speed reference input, a DIN-rail mounted signal isolator (such as those in the Phoenix Contact MINI Analog series) is recommended to eliminate ground loop interference in electrically noisy environments.

For applications where the 1336F-BRF75-AE-DE is installed in a MCC (Motor Control Center) bucket or a dedicated VFD enclosure, the physical dimensions and mounting hole pattern of the 1336 PLUS II chassis are consistent across the series, allowing the replacement unit to be installed in the existing enclosure without structural modification. Cooling airflow requirements should be verified against the original installation drawings, particularly in enclosed cabinets where thermal management is critical at 75HP output levels.

Retrofit Guidance FAQ

Q: Can I reuse my existing motor wiring and cable conduit?
Yes. The 1336F-BRF75-AE-DE uses the same output terminal configuration as previous 1336 PLUS II units. Existing motor cables rated for the original drive’s output current can be reused provided they pass insulation resistance testing prior to reconnection.

Q: Will my existing PLC program require modification?
In most cases, no. If the replacement drive is configured with the same communication adapter (RIO or DeviceNet) and the same node address as the original unit, the PLC program’s I/O mapping remains valid. Parameter differences between drive revisions should be reviewed against the original parameter printout or HIM cartridge backup.

Q: How do I transfer parameters from the old drive to the new unit?
If the original drive is still operational, use a 1336-HIM-A3 or compatible HIM with a memory cartridge to upload the parameter set, then download it to the replacement unit. If the original drive has failed, parameters must be re-entered manually based on the original commissioning documentation or application engineering data.

Q: Is the physical footprint identical for panel cutout and mounting?
Yes. The 1336 PLUS II chassis dimensions are consistent within the same power range. The 75HP (Frame D) unit shares the same mounting bolt pattern and panel cutout dimensions, allowing direct installation in the existing enclosure.

Q: What communication protocols are supported?
The 1336F-BRF75-AE-DE supports DH+ and Remote I/O natively, with optional DeviceNet via the 1336-GM1 adapter. These protocols are fully compatible with SLC 500, PLC-5, and ControlLogix/CompactLogix systems using appropriate communication modules.

Q: What is the lead time and shipping arrangement?
Units are stocked and dispatched from Xiamen, China. Standard international shipping via DHL/FedEx Express typically delivers within 3–7 business days to most destinations. Expedited options are available for urgent plant shutdowns or unplanned failures.

Warranty Assurance

Every 1336F-BRF75-AE-DE unit supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each unit undergoes functional verification including power-on testing, parameter initialization check, and output voltage balance measurement across all three phases. Units are packed in anti-static foam with original or equivalent protective packaging to prevent transit damage.

In the event of a warranty claim, TOPNLMS provides replacement unit dispatch or repair support with a target response time of 1–2 business days from claim confirmation. Buyers are not required to return the defective unit before a replacement is arranged in cases of documented catastrophic failure. All warranty claims are handled directly via email at [email protected] with full traceability to the original order and shipment records.

For procurement teams requiring documentation, TOPNLMS can provide commercial invoices, packing lists, and test reports upon request. Volume orders and standing purchase agreements for MRO (Maintenance, Repair & Operations) inventory programs are supported with priority allocation and reserved stock arrangements.