Configuration shown; available options depend on project requirements.
FM12SANSI SMART METERING
FM12S ANSI Smart Meter
The FM12S is a polyphase ANSI Type C12.20 smart meter (120/208V) built for high-current revenue metering, integrated prepayment, and remote service control. With internal latching relay support for load limiting, load shedding, and disconnection/reconnection, full STS/CTS prepayment compatibility, and optional PLC communication, the FM12S is engineered for utilities deploying advanced metering infrastructure with active demand-side management.
ANSI Form 12SDLMS/COSEM4G / Wi-SUN
SPECIFICATIONS
Meter form12S
Nominal Voltage120 / 208 V
CurrentBasic current: 30 A | Maximum current: 200 A
Frequency60 Hz ± 5%
Accuracy ClassCA0.5
Real-Time Clock Accuracy< 0.5 s / day
BatteryER14250, 2 mm 2-pin JST plug
Operating Temperature–40 °C to +85 °C
Humidity0% to 100%, non-condensing
Enclosure protectionIP54
Contact us for current datasheets, applicable approvals and installation requirements.
Key features
- Plug-and-play communication module architecture
- Large LCD for at-a-glance meter status
- Non-volatile memory — no backup battery required to retain data
- Local and remote firmware upgrade support
- Anti-tamper design with full event logging
- Field-replaceable RTC battery
- UV-resistant transparent polycarbonate cover
Meter functions
Measurements
- kWh / kvarh / kVAh (import, export, and absolute)
- Maximum kW / kvar demand (import, export)
- Cumulative kW / kvar demand (import, export)
- Instantaneous voltage, current, phase angle, active power, reactive power, and power factor
- Current date and time
- Frequency
Billing
- Automatic monthly billing reset at 00:00:00 on the 1st day of each month, fully configurable
- Manual billing reset via demand-reset button
- Remote billing reset from the AMI system
- Up to 12 months of billing data retained in meter memory
Prepayment Functions
- Online prepayment supported remotely via the AMI system
- Low-balance alerts via audible alarm and LED indicator to prompt top-up
- Emergency credit and friendly-hours (holiday) modes supported
- Switchable STS / CTS token modes
- Switchable prepaid / postpaid operating modes
Load Profiles
- Up to 100 days of 15-minute load profiles across 16 channels, FIFO basis
- Load profile interval configurable from 1–60 minutes
LCD Display
- 8-digit LCD with 3 decimal places for power/demand and 2 for energy (programmable)
- Display area exceeds 14 cm², with 10 mm digit height
- Scrolling and manual (push-button) display modes
Tariff Functions
- Time-of-Use (TOU) metering of import/export energy (kWh, kvarh) and demand (kW, kvar) — up to 4 tariffs, 12 seasons, 8 weeks, 12 switch times, and 100 special days
- Up to 32 energy tariff and 32 demand tariff registers
- Battery and supercapacitor-backed clock and calendar
Power Quality
- Voltage unbalance detection
- Current-reversal detection
- Over-voltage and under-voltage detection with configurable thresholds
- Long- and short-duration outage detection with configurable thresholds
- Over-current detection with configurable thresholds
- All power quality events logged to non-volatile meter memory
Anti-Tamper
- Detection of cover removal, external magnetic field interference, current bypass, and other tamper conditions
- Tamper alarms displayed on LCD and LED indicators
- All tamper events logged to meter memory
Disconnection / Reconnection
- Internal latching relay supporting load limiting, load shedding, and prepayment service control
- Remote disconnection and reconnection from the AMI system
Communication
- Optical port compliant with ANSI C12.18
- Plug-and-play 4G / Wi-SUN communication module
- Optional PLC communication with UIU
Electrical immunity
- ESD — Contact Discharge
- 8 kV
- ESD — Air Discharge
- 15 kV
- Fast Transient Burst Test
- 4 kV
- Surge Immunity Test
- 6 kV
- Electromagnetic RF Field
- 10 V/m (with current) | 30 V/m (without current)
Standards referenced
These are references in the product datasheet, not certification claims. Contact Archai for applicable approvals and test reports for your configuration.
- ANSI C12.1 — Code for Electricity Metering
- ANSI C12.10 — Physical Aspects of Watthour Meters (Safety Standard)
- ANSI C12.18 — Protocol Specification for ANSI Type 2 Optical Port
- ANSI C12.20 — Electric Meters, 0.1 / 0.2 / 0.5 Accuracy Classes
- IEC 62052-11 — Metering Equipment: General Requirements, Tests and Test Conditions
- IEC 62053-21 — Static Meters for Active Energy (Classes 1 and 2)
- IEC 62053-23 — Static Meters for Reactive Energy (Class 2 & 3)
- IEC 62055-41 — Standard Transfer Specification (STS), One-Way Token Carrier Systems
- DLMS / COSEM — Device Language Message Specification / Companion Specification for Energy Metering
Dimensions
