Carlo GavazziSingle-Phase 1-Module DIN-Rail Energy Meter, 230 V L-N, 5(45) A Direct, RS485 Modbus, Bidirectional MID Class B

Product Description

What this part is

A Carlo Gavazzi EM111 single-phase energy analyser in a 1-module DIN-rail housing — the narrowest meter in the range at 17.5 mm wide. It meters active and reactive energy on a 230 V line-to-neutral circuit with the load current passing directly through the meter, and reports over RS485 Modbus RTU. Backlit 7-digit LCD with a touch keypad.

Decoding the designation

The order code EM111-DIN.AV8.1.X.S1.PF.B reads as model, range, system, power supply, output, option, measurement.

EM111-DIN – single-phase analyser, DIN-rail housing, 1 module.

AV8 – 230 V L-N AC, 5(45) A direct connection, rated 32 A primary.

1 – 1-phase, 2-wire system.

X – self powered from the measured voltage, no auxiliary supply.

S1 – RS485 Modbus RTU port (M1 is M-Bus, O1 a pulse output).

PF – certified to the MID Directive, Modules B and D, usable for fiscal metrology.

B – bidirectional: imported and exported energy on separate registers, with only the total positive register MID certified.

What these specs mean in practice

Rated Primary Current: 32 A. Maximum Current: 45 A, which Carlo Gavazzi allows with a 6 mm² conductor where local rules and the terminals permit. The B measurement option separates import from export and lights a fixed orange LED when the current direction is reversed, which flags a backwards direct connection. At one DIN module it is narrower than the 2-module EM112, and rated 45 A direct against 100 A for the EM112.

Published specifications

System: 1-phase, 2-wire. Nominal Voltage: 230 V L-N AC, −30% +20%. Current: Ib 5 A, Imax 45 A, Imin 0.25 A, direct connection (32 A rated primary). Start-up Current: 20 mA. Start-up Voltage: 161 V L-N. Active Energy: Class 1 per EN62053-21, Class B per EN50470-3. Reactive Energy: Class 2 per EN62053-23. Current/Voltage Accuracy: ±0.5% of reading. Performance: IEC/EN61557-12 class 1 active power, class 2 active energy.

Registers: kWh and kvarh imported and exported separately, kWh+ on two tariffs. Instantaneous Values: kW, kvar, V, A, PF, Hz, kW demand and demand peak. Communication: RS485 Modbus RTU slave, 9.6 / 19.2 / 38.4 / 57.6 / 115.2 kbaud, address 1 to 247, up to 247 transceivers per bus, 1 s data refresh. Default Modbus Address: 01. Default Baud Rate: 9.6 kbaud. Default Parity: none. Maximum RS485 Run Without Repeater: 1000 m. Demand Integration Time: 1 to 30 minutes, default 1 minute. Digital Input: 1, volt-free contact, for tariff switching. Front LED: 1000 imp/kWh (AV8). Sampling: 4096 samples/s.

Insulation: 4000 V AC RMS for 1 minute; overvoltage category III. Operating Temperature: −25 to +55 °C (PF option, standard suffixes). Protection: IP51 front, IP20 terminals. Power Consumption: ≤1.0 W, ≤8 VA. Weight: approx. 80 g.

Mounting data

Housing: 17.5 x 63 x 91.5 mm (W x D x H), 1 DIN module, PBT self-extinguishing UL 94 V-0. Measuring terminals: 6 mm² max, 1.1 Nm. Other terminals: 1.5 mm², 0.4 Nm.

Quantity and configuration

Unit Quantity: 1 Pc. Sealing covers are part of the standard product.

Interchange guidance

The suffixes are the part number. AV5 is the 5(6) A CT-input version and MV5 the 333 mV current-sensor version, both for use with external sensors rather than direct connection. AV7 is the 120 V variant. M1 and O1 replace the RS485 port with M-Bus or a pulse output. The .PF.A version sums both current directions into one certified register. The 2-DIN EM112 covers 100 A direct and the 3-DIN EM330/EM340 are three-phase — related models, not substitutes.