Allen-Bradley 1336F-BRF20-AA Energy-Saving AC Drive

Allen-Bradley 1336F-BRF20-AA Energy-Saving AC Drive for Optimized 1336 FORCE Automation

The Allen-Bradley 1336F-BRF20-AA is a high-performance variable frequency drive (VFD) from Rockwell Automation’s 1336 FORCE series, engineered to deliver precise motor speed and torque control while dramatically reducing energy consumption across demanding industrial environments. Designed for continuous-duty applications in manufacturing, process control, and material handling, this AC drive enables production lines to operate at peak efficiency — minimizing idle energy draw, eliminating mechanical stress from across-the-line starting, and extending the service life of connected motor assets.

In modern factories where energy costs represent a significant share of operating expenditure, the 1336F-BRF20-AA provides a measurable return on investment by matching motor output exactly to load demand. Rather than running motors at fixed full speed, the drive modulates output frequency and voltage in real time, reducing kilowatt-hour consumption by 20–50% in variable-torque applications such as pumps, fans, and compressors. This capability directly supports plant-wide energy management initiatives and contributes to ISO 50001 energy performance targets.

Efficiency Performance Table

Energy-Aware Automation Architecture

The 1336F-BRF20-AA integrates seamlessly into Rockwell Automation’s broader control ecosystem, enabling a layered energy-aware architecture that spans from field-level sensing to supervisory control. At the controller level, a ControlLogix L73 or CompactLogix L33ER PLC coordinates drive commands via the 1336-GM1 Remote I/O adapter, allowing the drive to respond dynamically to production schedule changes and load fluctuations without operator intervention.

For energy monitoring, the PowerMonitor 5000 (Cat. No. 1426-M5E) can be deployed upstream of the drive to capture real-time kW, kVAR, and power factor data, feeding this information back to the control system via EtherNet/IP. This closed-loop visibility allows engineers to correlate drive operating points with actual energy consumption, identifying inefficiency windows during shift transitions or low-demand periods.

On the I/O side, 1756-IB16 digital input modules and 1756-OF8 analog output modules within the ControlLogix chassis provide the signal infrastructure for speed reference commands and process feedback. When paired with a PanelView Plus 7 HMI terminal, operators gain a real-time dashboard of drive status, output frequency, motor current, and cumulative energy consumption — enabling informed decisions about production pacing and energy budgeting.

For applications requiring tighter motion coordination, the 1336F-BRF20-AA can operate alongside Kinetix 5700 servo drives on shared DC bus configurations, allowing regenerative energy from decelerating servo axes to be redistributed across the common bus and absorbed by the AC drive — reducing net energy drawn from the utility supply. The 1336-PB-SP2A dynamic braking option further enhances energy management during rapid deceleration cycles.

Communication flexibility is ensured through the 1336-GM6 DeviceNet adapter, enabling the drive to participate in device-level networks alongside 1734 POINT I/O modules and ArmorBlock MaXum I/O blocks distributed across the machine frame. This architecture reduces wiring complexity, shortens commissioning time, and supports predictive maintenance workflows by surfacing drive fault codes and thermal status directly to the SCADA layer.

Power Optimization in Real Production Lines

In a typical discrete manufacturing environment, motors running at fixed speed consume energy proportional to their rated capacity regardless of actual process demand. The 1336F-BRF20-AA eliminates this inefficiency by continuously adjusting output frequency to match the mechanical load — a capability that translates directly into reduced electricity bills, lower transformer loading, and decreased heat generation in motor windings.

On conveyor and material handling lines, the drive’s programmable acceleration and deceleration ramps eliminate the current inrush spikes that occur during direct-on-line motor starts. These spikes — often 6–8× rated current — stress switchgear, increase peak demand charges, and accelerate insulation degradation. By controlling the rate of speed change, the 1336F-BRF20-AA extends motor and gearbox service intervals, reducing unplanned downtime and the associated production losses.

In pump and fan applications governed by affinity laws, reducing motor speed by just 20% cuts power consumption by nearly 50%. A plant operating three 20 HP pump motors continuously at 80% speed instead of 100% can recover the cost of three 1336F-BRF20-AA drives within 12–18 months through energy savings alone — before accounting for reduced maintenance expenditure and improved process consistency.

The drive’s built-in fault logging and diagnostic registers provide maintenance teams with actionable data: overcurrent events, thermal warnings, and communication faults are timestamped and accessible via the DriveExplorer software tool, enabling condition-based maintenance scheduling rather than reactive repair. This shift from corrective to predictive maintenance reduces mean time to repair (MTTR) and improves overall equipment effectiveness (OEE) across the production line.

Every unit supplied by ZYPLC undergoes full functional testing prior to shipment — including no-load run verification, parameter upload, and output waveform inspection — ensuring that the drive arrives ready for immediate commissioning. Stock availability is maintained to support urgent replacement requirements, with same-day dispatch available for in-stock units.

Energy Optimization FAQ

Q1: How much energy can the 1336F-BRF20-AA save compared to a direct-on-line motor starter?
In variable-torque applications such as pumps and fans, energy savings of 20–50% are typical when the drive reduces motor speed to match actual process demand. The exact saving depends on the load profile, duty cycle, and baseline operating speed. Even in constant-torque applications, eliminating inrush current and enabling soft-start/stop reduces peak demand charges and extends equipment life.

Q2: Is the 1336F-BRF20-AA compatible with my existing Rockwell Automation control system?
Yes. The 1336 FORCE series supports Remote I/O and DH+ communication natively, making it directly compatible with ControlLogix, CompactLogix, SLC 500, and PLC-5 controllers. DeviceNet connectivity is available via the 1336-GM6 adapter. Parameter configuration and diagnostics are supported through DriveExplorer and RSLogix 5000 software environments.

Q3: Can this drive replace an existing 1336 FORCE unit without rewiring?
In most cases, yes. The 1336F-BRF20-AA is a direct form-fit-function replacement for other 1336 FORCE drives of equivalent power rating. Terminal assignments, parameter structures, and communication adapter slots are consistent across the series. ZYPLC recommends verifying the firmware revision and adapter configuration before installation to ensure seamless parameter migration.

Q4: What does the 12-month warranty cover, and what is the testing process?
All units supplied by ZYPLC carry a 12-month warranty covering manufacturing defects and functional failures under normal operating conditions. Prior to shipment, each drive undergoes a standardized test protocol including power-up verification, no-load output frequency sweep, fault register inspection, and communication port validation. A test report is available upon request. Warranty claims are processed directly through ZYPLC with a target response time of 48 hours.

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