Frient EMIZB-151

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 15 values from it, listed under Interface.

Connect it with

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

Specifications

The EMIZB-151, sold by Frient as the Electricity Meter Interface 2, P1, reads the customer port on a smart electricity meter instead of measuring the circuit itself. It connects with the RJ12 plug on its 800 mm cable, takes 5 V from the port and passes what the meter reports to a Zigbee 3.0 network. Frient lists DSMR 4.2 and 5.0.2 for the P1 interface, and the meter’s P1 port has to be enabled.¹

Power

Bus powered. Powered from the meter’s P1 port at 5 V; no battery.¹

Meter interface

P1 port, DSMR 4.2 and 5.0.2¹

Connector and cable

RJ12, 800 mm¹

Wireless

Zigbee 3.0, sensitivity -100 dBm at 1 % PER, output +10 dBm¹

Zigbee device type

Meter Interface (0x0053), Home Automation profile²

Update rate

10 s intervals plus each meter tick⁴

Operating temperature

0 to 50 °C¹

Humidity

5 to 85 % RH, non-condensing¹

Protection

IP2X¹

Dimensions

30 × 90 × 18 mm (W × D × H)¹

Weight

44.2 g¹

Firmware updates

Over the air through the Zigbee OTA Upgrade cluster²

Approvals

CE, RED, Low Voltage and RoHS directives; Zigbee 3.0 certified¹

Where it is used

• Whole-building import and export at sites with a DSMR smart meter, read from the fiscal meter without new CTs.

  Multi-site energy monitoring

• Grid import and export at a solar PV site, from the meter’s own exported energy registers.

  Solar PV monitoring

• Live net power at the connection point, to hold EV charging within the available supply.

  EV charging load management

Interface

On the Zigbee network it joins as a sleepy end device.²

Readings and settings, with units and ranges where Frient publishes them.²

Onics maps the meter’s total net demand (OBIS 1.7.0 minus 2.7.0) to the metering cluster and L1 net power (21.7.0 minus 22.7.0) to the electrical measurement cluster; both are published as power. On a single-phase meter they are the same. On a three-phase meter, add the three phase powers for the total.^2, 6

Gas, water or heat meters that the electricity meter relays on its sub-meter channels (OBIS 0-1 to 0-4:24.2.1) appear on Zigbee endpoints 0x40 to 0x43. The Zigbee definition behind this page reads only the electricity endpoint.^2, 6

Attributes the meter does not send stay empty. A single-phase meter, for example, leaves the L2 and L3 values unset.²

Setup

1. Check the P1 port

   Find the P1 port on the electricity meter and make sure it is enabled. The interface only works with a meter whose P1 port is active.¹

2. Open pairing in Edge

   In Edge, open pairing on the Gateway’s Zigbee network.

3. Plug it in

   Plug the RJ12 connector into the P1 port. The interface powers up from the port and, if it has never joined a network, searches for one with its yellow LED flashing once a second.²

4. Reset it if it was paired before

   Open the casing and hold the button for about 15 seconds. The LED blinks once, then twice, then continuously; release it and the interface resets and starts searching.²

5. Check the status and one reading

   Press the button briefly: one yellow blink means OK, three mean network trouble. Confirm Edge identifies it as Frient EMIZB-151 and compare imported energy with the meter’s display.²

Common questions

Does the EMIZB-151 need batteries or its own supply?

No. It is powered by the P1 port at 5 V, so it needs no battery and no mains supply.¹

Does it report solar export?

Yes. It reports exported energy from OBIS 2.8.0, or the sum of tariffs 1 and 2 when the meter sends only those, and net power is import minus export.²

Can it read my gas meter through the electricity meter?

The interface itself carries up to four sub-meters from the P1 telegram on separate Zigbee endpoints. The Zigbee definition behind this page reads only the electricity values, so gas readings are not listed here.^2, 6

How do I reset it?

Open the casing and hold the button for about 15 seconds, until the yellow LED blinks continuously. Onics documents 15 seconds for a factory reset; holding for 5 or 10 seconds starts the Zigbee EZ-mode functions instead.^2, 5