Eaton PXBCM-MMS-L21-A Power Xpert branch circuit monitor - UL
Part Number: PXBCM-MMS-L21-A
Quick Summary
Power Xpert branch circuit monitor is a meter module strip delivering real-time energy data for panel-level monitoring. Users often struggle with fragmented energy information, delayed reporting, and mismatched meters across systems. This module is CE Marked and UL Listed 61010-1 with File E185559, and complies with ANSI/IEEE Std C12.20 (0.5% accuracy) alongside CSA standards for trustworthy measurements in demanding environments. With compatibility to the PXBCM-MB base, and support for single-phase and three-phase configurations, it enables unified data collection from multiple feeders. By consolidating voltage, current, and energy metrics in one device, Eaton helps teams reduce downtime, improve energy visibility, and accelerate continuous improvement initiatives.
Product Information
Extended Description
PXBCM-MMS-L21-A Eaton: Power Xpert Branch Circuit Monitor Meter Module Strip, Left 21 100A CTs, 1" Spacing, Max 277 VAC L-N, 480VAC L-L, Single/Three phase, used with PXMBCM-MB
Product Name
Eaton Power Xpert branch circuit monitor meter module strip
Catalog Number
PXBCM-MMS-L21-A
UPC
786685954707
Product Length/Depth
3 in
Product Height
2.8 in
Product Width
28.5 in
Product Weight
1 lb
Warranty
1 year
Compliances
CE Marked
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
Va Wh --Positive & Negative Va demand Current Demand Wh --Net Current & Voltage - Per Phase Watts Current & Voltage - 3 Phase Max Vah Watt Demand Current & Voltage - 3 Phase Average
Voltage rating
277V L-N, 480V L-L
Feature → Business Impact → Application: High-accuracy energy measurements with ANSI/IEEE C12.20 (0.5% accuracy) provide dependable energy data for accurate demand management and billing, enabling facilities to identify waste and optimize usage during peak periods in manufacturing or data centers. Application: main feeders and subpanels requiring per-phase visibility. Feature → Business Impact → Application: Wide voltage support of 277V L-N and 480V L-L allows installation across diverse plant networks without extra transformers, reducingCapex and simplifying panel upgrades. Application: mixed-voltage environments and multi-branch panels. Feature → Business Impact → Application: Multiple CT inputs and 1" spacing support precise, scalable current sensing (up to 21 CTs) for complex feeder architectures, improving fault detection and energy attribution. Application: multi-feed circuits in process lines. Feature → Business Impact → Application: Comprehensive instrumentation (Va, Wh, V, I per phase, Watts, Watt Demand, etc.) delivers an all-in-one energy picture, accelerating compliance reporting and operational improvements. Application: energy management programs and utility reporting. Feature → Business Impact → Application: PXBCM-MB compatibility and UL/CE certifications streamline installation, commissioning, and ongoing maintenance, reducing installation time and service calls. Application: panel upgrades and new installations in OEM and retrofit projects. Feature → Business Impact → Application: 1-year warranty and rugged IEC-ready compliance minimize lifecycle risk and total cost of ownership, supporting long-term reliability in harsh industrial environments.
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FAQs
The PXBCM-MMS-L21-A is designed to work with the PXBCM-MB base module, offering 1" spacing for easy panel integration. It supports single-phase and three-phase configurations and provides 277V L-N and 480V L-L operation, along with 333 mV current sensor input. This setup minimizes retrofit complexity while ensuring reliable data collection from multi-feed panels.
The monitor delivers ANSI/IEEE Std C12.20 accuracy at 0.5%, backed by UL Listed 61010-1 (File E185559) and CE compliance. EN 61000-4-4 and EN 61000-4-5 surge considerations are included, ensuring robustness in industrial environments. CSA Std. C22.2 No. 1010.1.92 further underpins North American regulatory alignment for electrical measurement devices.
Yes. It provides per-phase Va, Wh, V, and I metrics, plus Watt and Watt Demand, enabling comprehensive energy visibility for both data centers and manufacturing lines. With 277V L-N and 480V L-L ratings and multi- feeder compatibility (single-phase to three-phase), it supports precise energy accounting, downtime reduction, and enhanced demand management in critical facilities.
Key certifications include UL Listed 61010-1 (File E185559), CE Marking, and ANSI/IEEE C12.20 (0.5% accuracy). These certifications simplify procurement, ensure regulatory compliance across North America and Europe, and provide confidence in measurement integrity for energy reporting, utility rebates, and safety audits within industrial environments.
Energy monitoring with this module yields faster visibility into consumption, enabling informed demand-side management and potential utility savings. The 1-year warranty minimizes risk, and its integration with PXBCM-MB reduces installation time and field visits. Ongoing maintenance is typically limited to standard diagnostics and firmware updates provided through Eaton’s support ecosystem.