Product Overview

The Allen-Bradley 2094-BMP5-S​ is a single-axis servo inverter module within Rockwell Automation’s Kinetix 6000 multi-axis servo platform, occupying one “book-width” slot in a 2094 shared-DC-bus rack that combines a 2094-BCxx power-supply module (rectifier + DC bus) on the left, one or more 2094-BMPx-S axis modules to the right, and a 2094-BMxx bus-decoupler/shunt module at the far right. The 2094-BMP5-S​ does not contain its own rectifier—it draws from the 650V DC nominal bus (458–747V DC range) supplied by the 2094-BCxx upstream, and inverts that DC into 3-phase 360/480V-class AC for the servo motor. Rated at 1.8 kW continuous (2.8A RMS, 4.0A 0-peak / 4.2A RMS peak on Series A; Series B/C raise peak to 7.0A RMS with firmware peak-enhancement), the 2094-BMP5-S​ sits in the lower-middle of the BMP current ladder—below BMP8 (5.5 kW / 8.5A) and BMP10, above BMP3 (0.8 kW / 1.6A)—making it the canonical “medium-duty single-axis” choice for packaging knives, print-register servos, and conveyor indexing axes that don’t need the 5.5 kW+ headroom of a BMP8.Control communication rides SERCOS fiber (the same ring that pairs with 1768-M04SE on CompactLogix L4x or 1756-M08SE/1756-M16SE on ControlLogix 5560/5570), delivering deterministic position/velocity setpoints and returning actual position, drive status, and fault codes at the SERCOS-II cycle rate. The “S” suffix is critical: the 2094-BMP5-S​ integrates hardware-level Safe Torque Off (STO), certified to ISO 13849-1 PLe / IEC 61508 SIL 3, which removes inverter gate drive independent of the controller when a safety circuit (safety relay, guard-door switch, e-stop) opens—no external contactors on the motor legs required, simplifying panel design and reducing restart complexity. Rockwell formally discontinued the entire Kinetix 6000 axis module family on December 31, 2023, with the 2094-BMP5-S​ engineering-replaced by the 2198-D012-ERS3 (Kinetix 6200 / Kinetix 5700 CIP Motion + CIP Safety migration path, though firmware and rack changes apply). For plants still running Kinetix 6000 SERCOS rings—enormous installed base in converting, printing, pharmaceutical, and automotive sub-assembly—the 2094-BMP5-S​ remains the correct sustainment procurement, and the BMP-S series’ shared-bus + STO + SERCOS formula is why Kinetix 6000 survived 15+ years as Rockwell’s volume multi-axis line before CIP Motion took over.

Technical Specifications

Main Features and Advantages

Shared DC-bus architecture with regenerative energy sharing:​ The signature Kinetix 6000 value—and the 2094-BMP5-S​ inherits it fully—is that the rectifier lives in the 2094-BCxx power module, not in each axis. All BMP axis modules on the same 2094 rail hang on the same 650V DC bus bars, so when a knife axis on a flow-wrapper decelerates (regenerating), that energy dumps onto the bus and is immediately consumed by an accelerating feed-axis on the same rail instead of burning in a brake resistor. On a 2094-BMP5-S-class machine (medium-duty, frequent start-stop—bag makers, carton erectors, labelers), this regenerative sharing typically cuts total rack dissipation by 15–25% versus discrete drives, and the internal shunt on the 2094-BMP5-S​ (50W continuous / 5.6 kW peak) only fires when the bus exceeds ~805V (shunt-open threshold), i.e., when regeneration exceeds what sibling axes can absorb. For plants paying demand charges, that shared-bus math is real money.Integrated STO (S suffix) with PLe/SIL 3:​ The “S” on 2094-BMP5-S​ is not cosmetic—it’s the hardware STO circuit that kills gate-drive to the inverter IGBTs when the STO input circuit (wired to a safety relay or safety PLC) opens, independent of the SERCOS master, the Logix program, and even if the drive firmware hangs. Certified to PLe/SIL 3, this lets a guard-door open on a print press trip the 2094-BMP5-S​ STO input, torque drops to zero on the print-cylinder servo within one PWM cycle (~125 µs), and the machine can restart by closing the guard and resetting the safety relay—no full 2094-BCxx power cycle, no contactor on the motor legs, no “motor freewheeling under stored energy” risk. Pre-STO Kinetix 6000 axes (plain 2094-BMP5, no -S) required external safety contactors or a 2094-SSRC safety module; the 2094-BMP5-S​ bakes it in and saves the panel space + wiring.SERCOS fiber determinism for tight multi-axis sync:​ The 2094-BMP5-S​ has no RJ-45, no EtherNet/IP port—its only motion link is the SERCOS-II fiber ring (daisy from 1768-M04SE or 1756-M08SE, through each BMP axis’s dual ST ports, back to the master). That fiber ring is what lets a 2094-BMP5-S​ running a print-register slave axis stay phase-locked to the master encoder axis at sub-microsecond jitter, executing MAG (gear) and MATC (cam) instructions in the Logix motion planner with the servo loop closed on the BMP’s 1300 Hz current loop / 500 Hz velocity loop. For electronic-cam applications (rotary die cutter, flying shear), this is the performance envelope—8 kHz PWM, 1300 Hz current loop—that keeps following error tight through high-dynamic acceleration. The 2094-BMP5-S​ also supports multi-turn absolute encoders, so a power-loss → restore doesn’t require a home-return sequence if the mechanical load holds position (or the encoder has a mechanical multi-turn buffer).Book-Mount Plus form factor and peak-current enhancement:​ The BMP series name comes from “Book-Mount Plus”—each axis module is ~70 mm wide, stacks side-by-side on the 2094 rail like books on a shelf, with the 2094-BMxx bus-decoupler at the right end clamping the bus bars and providing the shunt connection. A 4-axis Kinetix 6000 rack (BC + BMP5 + BMP5 + BMP8 + BM) occupies roughly 70 × 4 + BC width + BM width in a panel—compact for 4× 1.8–5.5 kW axes. The 2094-BMP5-S​ Series B/C adds “peak enhance” firmware: the 2.8A RMS continuous can be pushed to 7.0A RMS peak (150% of continuous) for short durations, enabled via RSLogix 5000 v16+ and Kinetix 6000 drive firmware—useful on indexing axes where the accel/decel spike exceeds nominal but the RMS over the cycle stays under 2.8A. Series A caps at ~4.2A RMS peak, so matching 2094-BMP5-S​ Series revision to the existing rack’s firmware is a sustainment gotcha—mixing A and B/C on the same SERCOS ring works at baseline but peak-enhance won’t activate on the A units.98% efficiency and thermal reality:​ The 2094-BMP5-S​ runs 98% efficient at rated 1.8 kW, meaning ~36W dissipation inside the book-width envelope—manageable with the 2094 rack’s internal convection + the cabinet’s forced air, but the 0–50°C ambient rating means hot-aisle panels (convertors, near-dryer) need airflow planning. The module’s 2.44 kg mass is mostly the bus-bar clamps and IGBT heatsink—when racking a 2094-BMP5-S​ onto the 2094 rail, the DC-bus power must be de-energized (650V DC is lethal and stored in the BCxx capacitor bank for 30+ seconds post-AC-cut), and the bus-decoupler (2094-BMxx) must be unlatched before removing/inserting any BMP module. Kinetix 6000 does NOT support hot-swap of axis modules—this is a common misconception from the “Book-Mount” name sounding like it should be RIUP; it isn’t.Sustainment and replacement path:​ Rockwell EOL’d Kinetix 6000 axis modules 2023-12-31. The 2094-BMP5-S​ engineering replacement is 2198-D012-ERS3 (Kinetix 6200 axis, CIP Motion + CIP Safety, requires 2198-BC09 power module and a Logix 5580/5380+1756-EN4x or 1769-L4x EtherNet/IP, no SERCOS). Migrating a 2094-BMP5-S​ ring to 2198-D012-ERS3 means: new 2198-BCxx power rack, new CIP Motion firmware, RSLogix → Studio 5000 motion-tag conversion (SERCOS axis tags map to CIP Motion axis tags but the ring topology changes from fiber to RJ-45), and motor/cable stay (Kinetix 6000 motors are dual-compatible with 2198 via the same feedback connector). For plants not ready to migrate, the 2094-BMP5-S​ remains available through sustainment/spares channels, and the 1768-M04SE + 1756-M08SE SERCOS masters still ship sustainment too.