Carlo GavazziSingle-Phase DIN-Rail Energy Meter, 230 V L-N, 5(100) A Direct Connection, M-Bus Port, MID Class B

Product Description

What this part is

A Carlo Gavazzi EM112 single-phase energy analyser in a 2-module DIN-rail housing. It meters active and reactive energy on a 230 V line-to-neutral circuit with the load current passing directly through the meter — no current transformer is needed up to 100 A. The backlit LCD carries three rows of eight digits with an integrated touch keypad, and this version reports over M-Bus.

Decoding the order code

EM112-DIN — single-phase analyser, DIN-rail housing, 2 modules.

AV0 — 230 V L-N AC, 5(100) A direct connection. AV1 is the 120 V variant.

1 — 1-phase, 2-wire system.

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

M1 — M-Bus communication port. S1 is RS485 Modbus, O1 a pulse output.

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

A — power is always integrated in both directions and the total energy register is the MID-certified one.

What these specs mean in practice

The AV0 range code makes this a 230 V meter, self powered from the same 230 V measuring input, with no separate supply terminal. Direct 100 A connection means the busbar or cable runs through the meter, with 25 mm² conductors at the measuring terminals. The A measurement option totalises energy regardless of current direction; the .PF.B variant certifies only the positive register.

Published specifications

System: 1-phase, 2-wire. Nominal Voltage: 230 V L-N AC, −30% +20%. Current: Ib 5 A, Imax 100 A, Imin 0.25 A, direct connection. Start-up Current: 40 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. Registers: kWh and kvarh imported/exported, kWh+ on two tariffs. Instantaneous Values: kW, kvar, V, A, PF, Hz, kW demand and demand peak.

Communication: M-Bus per EN13757-3, 0.3 / 2.4 / 9.6 kbaud, up to 250 meters on the network. M-Bus Primary Address: 1 to 250. M-Bus Baud Rate Default: 2.4 kbaud. Secondary M-Bus Address: fixed at production in the 7000 0000 to 7999 9999 range. Demand Integration Time: 1 to 30 minutes, default 1 minute. Digital Input: 1, volt-free contact, for tariff switching. Front LED: 1000 imp/kWh. Sampling: 4096 samples/s.

Insulation: 4000 V AC RMS for 1 minute; overvoltage category III. Operating Temperature: −25 to +55 °C (PF option). Protection: IP51 front, IP20 terminals. Housing: 35 x 63 x 90 mm (W x H x D), 2 DIN modules, self-extinguishing UL 94 V-0. Power Consumption: ≤1 W, ≤8 VA. Weight: approx. 160 g.

Quantity and configuration

Sold as 1 piece.

Interchange guidance

The EM112 family differs in the order-code suffixes. EM112-DIN.AV0.1.X.S1.PF.A is the same meter with RS485 Modbus instead of M-Bus; the .PF.B variants certify only the positive register; AV1 is the 120 V variant. The 1-DIN EM111 is the 45 A version and the 3-DIN EM340 is the three-phase version, related models.