---
lang: "en"
title: "MR-SM3 - Modbus RTU Smart Meter"
sku: "11084113"
canonical_url: "https://shop.marcomweb.it/en/modbus/mr-sm3-modbus-rtu-smart-meter"
brand: "MARCOM S.r.l."
end_of_life: "false"
---

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MR-SM3 - Modbus RTU Smart Meter

The MR-SM3 module is a smart meter component for building automation.

Current, voltage, power, and many other values can be captured from three 230 Volt current circuits. In addition, the device provides monitoring functions such as asymmetry, phase failure, phase sequence, overvoltage, and undervoltage.
These values can be requested via a Modbus-Master. The module address, bit rate, and parity are set with two rotary selectors on the front or via software.
Suitable for decentralized mounting on a TH35 DIN rail according to IEC 60715 in electrical distribution cabinets.

Connection with screw terminals

## Features

- Modbus RTU protocol
- Address range from 00 to F9
- RS485 bus interface (two-wire bus)
- Transmission speed from 1200 to 115200 bit / s
- Operating voltage 24 V AC / DC +/- 10% (SELV)
- Current consumption 108 mA (AC) / 50 mA (DC)
- Relative duty cycle 100%
- 3 x analog inputs
- Input / voltage 230 V AC from -20 to +15%
- Input / voltage range from 184 V to 265 V AC
- Input / current from 0 A to 16 A AC
- LED display green, red
- Dimensions (W x H x D) 50 x 69.3 x 60 mm
- Weight 110 g
- Operating temperature range from -5 ° C to 55 ° C
- Storage temperature range from -20 ° C to 70 ° C
- Ingress protection for housings / terminal blocks IP40 / IP20

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Source: https://shop.marcomweb.it/en/modbus/mr-sm3-modbus-rtu-smart-meter

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.