The Selec EM4M-3P-C-100Ais a compact 3-phase multifunction energy meter designed for direct 100A applications without CTs. Equipped with RS-485 Modbus RTU, pulse output, LCD display, Class-1 accuracy, and maximum demand monitoring, it is ideal for industrial panels, commercial systems, load management, and energy auditing.
(All features verified from pages 1–4 of the EM4M manual.)

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 Key Features

• 3-phase, 3-wire / 4-wire True RMS measurement

• Direct 100A measurement (no CT required)

• Measures V, A, PF, Frequency, kW/kVAr/kVA, kWh/kVArh/kVAh

• LCD display with backlight

• RS-485 Modbus RTU communication

• Pulse output for PLC/BMS integration

• Maximum demand (MD) measurement

• Programmable display parameters

• Password protection for settings

• 1-second update rate

• DIN-rail mountable compact design
  (From manual page 1 & 2)

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Technical Specifications (Table)

Parameter	Specification
Model	EM4M-3P-C-100A
Wiring System	3Ø-4W / 3Ø-3W
Voltage Range	176–276V L-N, 304–480V L-L
Current Range	Direct 100A (Imax), Ib = 10A, Imin = 0.5A
Frequency	45–65 Hz
Display	LCD with backlight, 4 digits
Display Update Time	1 second
Active Energy Accuracy	Class-1
Reactive Energy Accuracy	Class-2
Voltage Accuracy	±0.5% FS
Current Accuracy	±0.5% FS
Power Accuracy	±1% FS
PF Accuracy	±0.01
Pulse Output	24 VDC max, 100 mA
Pulse Weight	1 / 10 / 100 / 1000 pulses
Communication	RS-485 Modbus RTU
Baud Rate	9600 / 19200
Parity	None / Odd / Even
Stop Bits	1 or 2
Transmission Distance	Up to 500 m
Power Consumption	< 8 VA
Operating Temperature	–10°C to 55°C
Humidity	Up to 85% RH non-condensing
Mounting	DIN Rail
Dimensions	114 × 106 × 74 mm
Weight	320 g
(All verifier values: EM4M manual pages 1–3)

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Applications

• Industrial 3-phase energy monitoring

• Commercial building metering

• HVAC load measurement

• DG panel monitoring

• Solar and renewable load monitoring

• Smart building, BMS, EMS

• Sub-metering for industrial loads

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What’s in the Box

• Selec EM4M-3P-C-100A Meter

• User Instruction Manual

• DIN-rail mounting clip

• Warranty card

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FAQ 

Q1: Does EM4M require external CTs?
No—it supports 100A direct measurement.
✔ Verified from manual.

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Q2: Does this meter support Modbus?
Yes, it supports RS-485 Modbus RTU (9600/19200 bps).
✔ Listed under the communication section.

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Q3: Is it Class-1 accuracy?
Yes—Active Energy Accuracy is Class-1 (IEC).
✔ Verified from technical table.

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Q4: What pulse output does it provide?
Pulse output supports 24V DC, 100 mA, and a pulse weight of 1–1000 pulses.
✔ From pulse output specification.

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Q5: Can it measure maximum demand?
Yes—EM4M displays MD (kW / kVAr / kVA).
✔ Verified from display menu.

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Q6: How is the meter mounted?
It is DIN-rail mountable with a compact enclosure.
✔ From mechanical drawing.