Acti 9 iEM Energy Meters — clear, structured overview

The Acti 9 iEM series is Schneider Electric’s DIN‑rail energy‑meter family designed for sub‑metering, cost allocation, energy efficiency programs, and BMS/EMS integration across residential, commercial, and industrial sites in Singapore.

🌟 What defines the Acti 9 iEM series

• Accurate energy measurement — active (kWh), reactive (kvarh), and depending on model, apparent energy and power quality parameters.
• DIN‑rail mounting — compact form factor for distribution boards and sub‑metering panels.
• LCD display — real‑time visibility of consumption and electrical parameters.
• Communication‑ready — Modbus, BACnet, M‑Bus, or pulse output depending on model.
• High accuracy — typically Class 1 or Class 0.5, suitable for billing‑grade sub‑metering.
• Multi‑tariff support — time‑of‑use energy tracking for cost allocation.
• Easy integration — works with EMS/BMS and EcoStruxure platforms.
• Standards‑compliant — IEC 62053‑21/22 for active energy accuracy.

📦 Product families and capabilities

Below is a practical breakdown of the most common models.

🔹 iEM2000 Series

• Single‑phase, direct measurement up to 63 A.
• iEM2000 — basic kWh meter, Class 1.
• iEM2010 — adds pulse output for BMS/EMS integration.
• Ideal for residential units, small offices, and simple sub‑metering.

🔹 iEM3000 Series

• Three‑phase meters for more advanced monitoring.
• iEM3100 — basic 3‑phase kWh meter.
• iEM3110 — adds Modbus communication.
• iEM3115 — adds digital I/O for alarms or control.
• iEM3155 — high‑end model with multi‑tariff, active/reactive/apparent energy, and full Modbus support.
• Ideal for commercial buildings, industrial feeders, and tenant billing.

🏢 Where the iEM series is used

• Residential — HDB/condo sub‑metering, tenant billing, load monitoring.
• Commercial — malls, offices, retail units for energy cost allocation and efficiency tracking.
• Industrial — monitoring feeders, machines, and production lines for energy optimisation.
• Multi‑tenant buildings — accurate billing and consumption transparency.
• Energy dashboards — integration with EMS/BMS for real‑time analytics.

🔧 Installation & configuration essentials

• DIN‑rail mounting — fits standard distribution boards.
• Correct wiring — ensure proper phase/neutral connection; CT polarity must be correct for CT‑based models.
• Communication setup — configure Modbus/BACnet addresses, baud rate, and integration parameters.
• Tariff configuration — for multi‑tariff models, set TOU schedules in the meter or EMS.
• Verification — check readings against known loads during commissioning.

📘 Compliance & standards

• IEC 62053‑21 — Class 1 active energy meters.
• IEC 62053‑22 — Class 0.5S high‑accuracy meters.
• Safety & EMC — compliant with global LV metering standards.

🧭 Quick selection guide

Use this when choosing the right meter: