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Multi-function Power Meter

SATEC EM133 is a multifunction power meter, ideal for a wide range of applications such as revenue metering, industrial power monitoring
and for interfacing SCADA in utility substations.
The EM133 can be fitted with a wide range of communication interfaces and I/O extensions, making it a cost-effective combination of a
power meter, smart transducer and PLC controller.
MID certified for revenue metering, it is designed for DIN-rail mounting, equipped with built-in communication ports, digital I/Os and anti-tamper enclosures.

Accuracy: Class 0.5/0.5S per ANSI / IEC 62053-22

Revenue Meter: anti-tamper design; can bill 3 individual single phase clients; IR interface

MID certified


  • Built-in ports: RS485; IR (optical)
  • Optional ports: ETH; Wi-Fi; cellular; Profibus
  • Open protocol: Modbus RTU; DNP3.0
  • IEC 60870-5-101/104

Digital & Analog I/O

  • Built-in I/O: 1 RO; 2 DI
  • Modular I/O: up to 16 I/O
  • Smart Transducer: 4 analog outputs

Broad-range measurement

  • Voltage: 15-828V AC (direct, L-L)
  • Frequency: 25, 50, 60, 400 Hz

Multi-option Current Inputs

  • 5A or 1A
  • 63A direct connection
  • 40mA for HACS CTs (100-3,000A)
  • special input: clip-on 5A HACS for retrofit

Power Meter

  • Voltage, current (including neutral current), power, energy, power factor, frequency, voltage/current unbalance
  • Ampere/Volt demand meter
  • 25, 50, 60 and 400 Hz measurements
  • Sampling frequency: 128 samples per cycle

Revenue Meter

  • Class 0.5/0.5S accuracy per ANSI C12.20 / IEC 62053-22
  • Optional: MID certified, Class B or C (EN50470-3); 5A input is mandatory
  • Four-quadrant import and export (e.g. PV), active and reactive energy poly-phase static meter
  • Three-phase total and per phase energy measurements; active, reactive and apparent energy counters
  • Time-of-Use, 4 totalization and tariff energy/demand registers x 8 tariffs, 4 seasons x 4 types of days, 8 tariff changes per day
  • Easily programmable tariff calendar schedule
  • Automatic daily energy and maximum demand profile log for total and tariff registers
  • Sealable, revenue grade anti-tamper design

Harmonic Analyzer

  • Voltage and current THD, TDD and K-Factor,
  • Voltage and current harmonic spectrum and angles, up to the 40th order harmonic

Data Logger

  • Non-volatile memory for timestamped event and data logging: over 90 days for 2 daily TOU records, half-hourly writing of 4 parameters and recording over 200 events
  • Event recorder for logging internal diagnostic events and setup changes
  • Two data recorders; programmable data logs on a periodic basis

Variable Current Inputs

Available options:

  • 5A (mandatory for MID)
  • 1A
  • HACS: special 40mA inputs for SATEC’s High Accuracy Current Sensors
  • 63A Direct Measurement
  • RS5: Special 5A input for 5A clip-on HACS for retrofit installation on existing MV/HV CT secondary.

Voltage Measurement Input Rating

  • Nominal voltage: 400/690V AC (L-N/L-L)
  • Operating range: 15-480/828V AC (L-N/L-L)



  • 2 Digital Inputs
  • 1 form A digital output (Solid State Relay)

Modular I/O (available options):

  • 4 Digital Inputs + 2 digital outputs (SSR or EM)
  • 12 Digital Inputs + 4 Digital Outputs (including additional com port of choice)
  • 8 Digital Inputs
  • 4 Analog Outputs (for Smart Transducer application)

(see Module tab for detailed spec)

Programmable Logical Controller

  • Embedded programmable controller
  • 16 control set points; programmable thresholds and delays
  • Relay output control (for alarm and protection)
  • 1-cycle response time


  • 2 x 16 Characters LCD display; adjustable update time
  • Auto-scroll option with adjustable page exposition time; auto-return to a default page

Real Time Clock

  • Built-in clock and calendar functions
  • 2 year battery backup

Communication Interfaces


  • Standard 2-wire RS-485
  • IR (optical)

Add-on Com Modules (1 per device):

  • Multipurpose RS-232/422/485 port
  • ETH 10/100Base-T
  • 2G/3G/4G modem
  • Wi-Fi module

Communication Protocols

  • Modbus RTU/TCP
  • DNP 3.0/TCP
  • IEC 60870-5-101/104

Power Supply

Available options:

  • Self-powered from measured voltage (120/207 – 277/480V AC, L-N/L-L)
  • Auxiliary AC/DC power supply (85-265V AC, 88-290V DC)
  • Special versions (12, 24-48V DC)

Meter Security

  • Three-level Password security for protecting meter setups and accumulated data from unauthorized changes
  • Anti-tamper design (wiring seal)


DIN Rail sealable connection

Plug-In Modules

The EM133 modular configuration enables users to assemble a system that meets their specific needs.

Module Dimensions (HxWxD):

  • Small form: 2.8×1.8×1.3″ / 72×46×34 mm
  • Large form: 3.7×3×1.7″ / 95×77×45 mm



Second Communication port - Small Form

One of the following:

  • Ethernet (TCP/IP)
  • RS232/422/485
  • 2G/3G/4G
  • RF *
  • Wi-Fi
* Module & accessories available in certain regions only


4 Analog Outputs - Small Form

4 analog outputs
selection of ranges upon order:

  • ±1mA
  • 0-20mA
  • 0-1mA
  • 4-20mA
  • 0-5mA
  • ±5mA


6 Digital I/O - Small Form

One of the following:

  • 4 Digital Inputs (Dry Contact) + 2 Relay Outputs 250V / 5A AC
  • 4 Digital Inputs (Dry Contact) + 2 SSR Outputs 250V / 0.1A AC


8 Digital Inputs

8 Dry Contacts, internally wetted @ 24V DC


16 Digital I/O - Large Form

  • 12 Digital Inputs (Dry Contact or 250VDC)
  • 4 Relay Outputs 250V/5A AC
  • Optional selection of additional ETH, RS-485 or Profibus com port in module


Standard model

Power meter, energy meter and transducer offering all advanced specifications described in the Specs tab.


Extended Memory Residential Energy Meter

Offers all standard EM133 specifications and features, including:

  • Extended memory of 8MB
  • Advanced display of periodic consumption and customizable labels for pulse inputs, indicating volume for gas, water etc.
  • Internal sensor measuring device temperature


MID certified Energy Meter

Offers all standard EM133 specifications and features.
Must be configured:

  • 5A current inputs
  • 50Hz
  • AC/DC power supply
  • Electronic seal

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