Eastron SDM120CT-M(40mA) Multifunction DIN Rail Meter

  1. PV Accessories

Eastron SDM120CT-M(40mA) Multifunction DIN Rail Meter

  • Category: PV Accessories
  • Features
    • Eastron SDM120CT‑M 40mA single‑phase DIN rail multifunction energy meter,40mA CT‑input bi‑directional solar PV zero‑export meter with RS485 Modbus RTU & dual pulse outputs, Class1.0 accuracy for residential commercial PV import‑export energy monitoring.

Product Description

Eastron SDM120CT-M(40mA) Multifunction DIN Rail Meter

Eastron SDM120CT‑M 40mA is compact 1‑module DIN‑rail single‑phase multifunction energy meter with 40mA CT input, designed for solar PV metering and zero‑export control systemsEastron El.... It supports bi‑directional import/export energy measurement, integrates RS485 Modbus‑RTU and dual pulse outputs for remote monitoring. With 17.5mm narrow width, RCM certification and Class1.0 active energy accuracy, it fits residential & commercial single-phase PV installations, works with wide-range external current transformers (CT primary:1-9999A).

Product Features

  • 40mA secondary CT input, configurable CT ratio (1‑9999A primary)
  • Bi‑directional measurement: import / export kWh for solar zero‑export control
  • Multi‑parameter reading: kWh, kvarh, W, V, A, PF, Hz, demand dmd
  • Dual passive pulse outputs + RS485 Modbus‑RTU communication
  • 1‑module narrow DIN‑rail housing (17.5mm width), 35mm DIN rail mount
  • LCD local display, button‑operated parameter scrolling
  • IEC62053‑21 Class1.0 active energy accuracy, RCM approved
  • 1P2W single-phase 2-wire, 230V AC, 50/60Hz operation

SPECIFICATIONS

ItemParameter
SystemSingle‑phase 2‑wire (1P+N), RMS measurement
Rated Voltage230V AC; operating range:80‑120%Un
Frequency50/60 Hz
CT Input40mA secondary; CT primary 1‑9999A
Starting Current10 mA
Accuracy‑Active EnergyIEC62053‑21 Class 1.0 / EN50470‑3 Class B
Accuracy‑Reactive EnergyIEC62053‑23 Class 2
Voltage / Current Accuracy±0.5%FS
Power Accuracy±1%FS
Frequency Accuracy±0.2% mid‑frequency
Power Factor Accuracy1% of unity

FAQ
Q1: What CT should I use for SDM120CT‑M (40mA)?

A: Must use CT with 40mA secondary output. CT primary range configurable 1‑9999A via meter setting.

Q2: Is this meter for zero‑export solar inverter?

A: Yes, bi‑directional import/export measurement & Modbus RTU output support zero‑export control for single‑phase PV systems.

Q3: What communication protocol does SDM120CT‑M use?

A: RS485 Modbus‑RTU; baud rate 1200‑9600bps, address 1‑247, max 1000m cable distance.

Q4: What is the difference between SDM120CT‑M / SDM120CT‑MB / SDM120CT‑P?

A: SDM120CT‑M=Modbus+2 pulse; SDM120CT‑MB=M‑Bus+2 pulse; SDM120CT‑P=2 pulse output only, no serial communication.

Q5: Does it support local display?

A: Yes, LCD screen with push‑button scroll to view voltage, current, power, import/export kWh, comms parameters.

Q6: Voltage supply requirement?

A: Powered by measuring voltage 230V AC, no separate auxiliary power supply needed.