NodOn SEM-4-1-00

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 10 values from it, listed under Interface.

Connect it with

• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The SEM-4-1-00 measures one single-phase circuit. The line conductor passes through a hole in the sensor body, and two flying leads connect it to L and N for its supply and voltage reference. At 46.8 × 17.8 × 21.3 mm it fits under a modular circuit breaker on the circuit it measures, so it can go into an existing board without an extra DIN slot.²

Power

Self-powered from the measured supply. Through its L and N leads from the circuit it measures, 110 to 240 V AC, 0.5 W.²

Poles

1P+N¹

Basic current

10 A¹

Measurement range

50 mA to 63 A¹

Accuracy

Class 1.0 (±1 %), IEC 61557-12¹

Overvoltage category

III¹

Rated insulation voltage

250 V¹

Wireless

Zigbee 3.0, 2.4 GHz, +10 dBm maximum¹

Current input

Through hole for the line conductor²

Operating temperature

-25 to 60 °C¹

Protection

IP20, indoor use¹

Dimensions

46.8 × 17.8 × 21.3 mm (H × W × D)¹

Weight

22 g¹

Order code

SEM-4-1-00, EAN 3700313926215¹

Where it is used

• Individual final circuits in a distribution board, such as lighting, heating or a kitchen supply, fitted under the existing breaker.

  Transformer and distribution board monitoring

• Tenant, zone or office circuits in a shared building, for recharging energy costs.

  Tenant submetering and cost allocation

• A single-phase inverter or grid connection, where separate consumed and produced counters show import and export.

  Solar PV monitoring

• A dedicated EV charge point circuit, to track what the car draws and adapt charging to the available supply.

  EV charging load management

Interface

Readings and settings, with units and ranges where NodOn publishes them. R readable, W writable only.⁵

Direction follows the arrow on the housing: energy flowing the way the arrow points is forward energy and reads as consumed energy, and energy flowing the other way reads as produced energy.²

Energy reset uses the Basic cluster’s reset-to-factory-defaults command, which clears the energy counters but keeps the sensor on the network with its bindings and reporting.⁵

Setup

1. Fit it with the circuit isolated

   Switch off at the breaker. Pass the line conductor through the sensor’s hole with the arrow pointing towards the load, then connect the blue lead to neutral and the black lead to line.²

2. Open pairing in Edge

   Switch the circuit back on and, in Edge, open pairing on the Gateway’s Zigbee network.

3. Put the sensor into pairing mode

   Press the button briefly until the LED flashes quickly, twice a second. The LED stays on steadily once the sensor has joined.²

4. Read the LED if it does not join

   A flash every second means a wireless communication failure and a flash every 4 seconds means no network connection. Hold the button for 3 to 5 seconds to reset the sensor, then pair it again.²

5. Check one reading

   Confirm Edge identifies it as NodOn SEM-4-1-00 and compare current with a clamp meter. Power that reads as export while the load is running means the conductor passes through against the arrow.²

Common questions

Does the SEM-4-1-00 need a NodOn hub to work with Edge?

No. It is a Zigbee 3.0 device and NodOn lists it as working with Zigbee gateways generally, so it joins the Zigbee radio on an EpiSensor Gateway directly.^1, 3

Does it measure solar export?

Yes. It measures in both directions: energy in the direction of the arrow on the housing counts as forward energy and the rest as produced energy, so fit it with the arrow pointing from the supply to the load.^1, 2

Can it be fitted after a contactor or a motor drive?

No. NodOn forbids installing it downstream of a contactor, variable frequency drive or motor starter because it can damage the sensor. Fit it upstream of those devices.²

How do I reset it?

Hold the button for 3 to 5 seconds. Then press it briefly to put the sensor back into pairing mode, shown by the LED flashing twice a second.²