Eaton PXBCM-MMS-R21-A Branch Circuit Monitor - UL Listed
Part Number: PXBCM-MMS-R21-A
Quick Summary
Power Xpert branch circuit monitor meter module strip delivers precise energy monitoring for commercial and industrial electrical panels. Engineers often struggle with fragmented load data and slow fault isolation, delaying corrective actions. It carries UL Listed certification and ANSI/IEEE C12.20 accuracy with 0.5% precision, plus EN 61000-4-4/5 robustness to handle electrical transients in challenging environments. Built to integrate with Eaton's Power Xpert monitoring ecosystem, it helps you optimize energy use, improve reporting, and simplify panel upgrades. With PXBCM-MB compatibility and a compact form factor, it enables scalable, data-driven energy management across multiple lines.
Product Information
Extended Description
PXBCM-MMS-R21-A Eaton: Power Xpert Branch Circuit Monitor Meter Module Strip, Right 21 100A CTs, 1 in Spacing, Max 277V L-N, 480V L-L, Single-, three-phase, used with PXMBCM-MB
Product Name
Eaton Power Xpert branch circuit monitor meter module strip
Catalog Number
PXBCM-MMS-R21-A
UPC
786685954714
Product Length/Depth
32.2 in
Product Height
4.7 in
Product Width
5.6 in
Product Weight
1 lb
Warranty
1 year
Compliances
Not Applicable
Certifications
EN 61000-4-4 Electrical fast transient EN 61000-4-5 Surge UL Listed 61010-1 File E185559 ANSI/IEEE Std C12.20 (0.5% accuracy) CSA Std. C22.2 No. 1010.1.92
Used with
PXBCM-MB
Current sensor input
333 mV
Number of CT inputs
Single-phase, three-phase
Instrumentation
Current & Voltage - 3 Phase Average Current & Voltage - Per Phase Wh --Net Vah Current Demand Va Wh --Positive & Negative Va demand Current & Voltage - 3 Phase Max Watts Watt Demand
Voltage rating
277V L-N, 480V L-L
Feature → Business Impact → Application The Power Xpert branch circuit monitor supports both single-phase and three-phase configurations, enabling comprehensive energy visibility across mixed panel setups, which translates to faster fault detection and reduced downtime in manufacturing lines. The 21 CT inputs and 100A CT range deliver granular current measurements, empowering engineers to pinpoint imbalances and optimize load distribution in data centers and process facilities. The device measures Voltage 277V L-N and 480V L-L, ensuring compatibility with common commercial and industrial power systems and enabling consistent reporting across facilities. The instrumentation set covers Current & Voltage, Phase-by-Phase metrics, energy (Wh) tracking, Demand (Va and Watt Demand), and three-phase max values, providing a complete energy profile for compliance reporting and cost allocation. The compact 32.2 in length, 5.6 in width, and 4.7 in height footprint fits in standard rack or panel spaces, reducing installation complexity and facilitating retrofits in legacy systems. The 333 mV current sensor input capability matches typical CT signals, simplifying sensor wiring and calibration while supporting accurate data logging for ongoing energy analytics. Dependable at 277V L-N and 480V L-L with UL and ANSI/IEEE references, the module delivers repeatable performance in panel boards and switchgear, strengthening your energy governance program. The 1-year warranty provides peace of mind for maintenance planning and total cost of ownership, while the compatibility with PXBCM-MB enables seamless integration into Eaton’s monitoring stack for scalable, enterprise-wide energy insights.
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FAQs
The PXBCM-MMS-R21-A is designed to work with the PXBCM-MB mounting base. Begin by mounting the module strip in the panel with appropriate clearance, connect the 21 CT inputs for current sensing, and wire the voltage inputs to 277V L-N and/or 480V L-L per panel configuration. Use the 333 mV current sensor input for CT signals, verify single-phase or three-phase wiring, and complete the data links to the Power Xpert monitoring stack. Follow the included Eaton specification sheet for wiring diagrams and safety notes to ensure compliance and accurate measurements.
Accuracy is specified per ANSI/IEEE C12.20 at 0.5%, with instrumentation covering Current & Voltage for 3-phase averages and per-phase values, Wh net, Vah, Va demand, Wh positive and negative, and 3-phase max watts. The device supports 21 CT inputs at 100A ratings and a 333 mV current sensor input, enabling precise energy and demand calculations across single-phase and three-phase configurations. Voltage rating supports 277V L-N and 480V L-L, making it suitable for most industrial power systems.
Yes. The module provides detailed, real-time energy and demand data across multiple lines, which is essential for data centers and manufacturing floors. With 21 CT inputs and compatibility with PXBCM-MB, it enables granular load monitoring, efficiency improvements, and cost allocation across critical loads. Its voltage support and 0.5% accuracy ensure reliable reporting required for facility-wide energy management programs.
The device carries UL Listed certification and ANSI/IEEE C12.20 (0.5% accuracy), with EN 61000-4-4 and EN 61000-4-5 compliance for electrical fast transient and surge protection, plus CSA standards. These certifications confirm electrical safety, measurement reliability, and resilience against transients, which are essential for enterprise-class data centers, manufacturing environments, and facilities subject to regulatory and quality assurance requirements.
The monitor improves energy visibility, enabling data-driven decisions that reduce wasted energy and optimize load distribution, which lowers utility costs and improves uptime. Its compatibility with the Power Xpert ecosystem simplifies maintenance by centralizing data, supporting proactive fault detection, and reducing manual metering, audits, and reporting overhead. The 1-year warranty also helps with predictable maintenance budgeting and total cost of ownership.