Which iEM3000 meters have Modbus?

The iEM3150, iEM3155, iEM3250, iEM3255, iEM3350 and iEM3355. Their order references are A9MEM3150 to A9MEM3355 with the same digits. The other communicating models use M-Bus, BACnet or LonWorks.

What is the difference between the iEM3150 and the iEM3155?

Both measure up to 63 A directly and speak Modbus. The iEM3155 adds MID approval, four-quadrant energy with reactive and apparent power, four tariffs, one digital input, one digital output and an overload alarm. The iEM3150 has none of those, so it answers fewer registers.

Why are the addresses one lower than in the Schneider manual?

The manual lists a register number and an address for every value, and the register number is the address plus one. The address is what goes on the bus. This page and the Edge templates use the address, so register 3000 in the manual is 2999 here.

Do I need to swap words on the iEM3000?

No. The measurements are IEEE 754 32-bit floats sent high word first, which Edge reads as big-endian with no word or byte swap. There is no multiplier to set either.

Can the iEM3155 be used for billing?

The iEM3155, iEM3255 and iEM3355 comply with the Measuring Instruments Directive and the UK MIR. To keep that approval, install them in a cabinet rated IP51 or better and set the wiring type to 3PH4W or 1PH4W. The iEM3150, iEM3250 and iEM3350 are not MID approved.

Why can I not change the address over Modbus?

The Com. Protection setting is enabled from the factory. While it is on, communication settings, wiring, date and time and the tariffs can only be changed from the front panel.

Schneider Electric iEM3000 series Modbus register map

Compatibility

Compatible with EpiSensor Edge over Modbus RTU.

Connect its RS-485 port to a Modbus Interface or to a serial interface on the Gateway. Edge polls it with its Modbus client.

Edge reads 29 values from it, listed under Interface.

Connect it with

Modbus Interface ZMB-3X
From €399 ex VAT Configure Modbus Interface
Gateway ZGW-20
From €899 ex VAT Configure Gateway

Specifications

Every Modbus model measures current, voltage, active power, power factor, frequency and active energy, per phase and in total. The iEM3155, iEM3255 and iEM3355 add reactive and apparent power, export and reactive energy, four tariffs, a digital input, a digital output, an overload alarm and MID approval for billing. The iEM3150, iEM3250 and iEM3350 are the plain versions: Schneider leaves those registers, the tariffs and MID approval out.¹

Power: Self-powered from the measured supply. The meter runs from its voltage inputs. There is no separate auxiliary supply to wire.¹
Active energy accuracy: Class 1 (IEC 62053-21); Class 0.5S (IEC 62053-22) on the iEM3250 and iEM3255 with 5 A CTs¹
MID approval: iEM3155 and iEM3355: Class B (EN 50470-3); iEM3255: Class B with 1 A CTs, Class C with 5 A CTs¹
Direct current range: 0.5 to 63 A (iEM3150, iEM3155); 1 to 125 A (iEM3350, iEM3355)¹
CT inputs (iEM3250, iEM3255): 1 A or 5 A nominal, 20 mA to 6 A measured¹
Voltage: 100 to 277 V L-N, 173 to 480 V L-L, ±20 %¹
Frequency: 50 or 60 Hz, ±10 %¹
Tariffs: 4 on the iEM3155, iEM3255 and iEM3355, switched by internal clock, digital input or Modbus¹
Width: 5 modules of 18 mm (63 A models); 7 modules (125 A models)¹
Protection: IP40 front panel, IP20 body¹
Operating conditions: -25 to 70 °C, 5 to 95 % RH non-condensing¹
Order references: A9MEM3150, A9MEM3155, A9MEM3250, A9MEM3255, A9MEM3350, A9MEM3355³

Where it is used

Tenant and departmental submetering, where the MID-approved iEM3155, iEM3255 and iEM3355 give a kWh register fit for billing.
Tenant submetering and cost allocation
Feeder and incomer monitoring on larger boards through current transformers, with the iEM3250 or iEM3255.
Transformer and distribution board monitoring
Metering air handling units, chillers and heat pumps on their own circuits, up to 63 A or 125 A direct.
HVAC energy monitoring for commercial buildings
Bringing meters already on a Modbus bus into a BMS or SCADA system through Edge.
Modbus meter integration for a BMS or SCADA system

Interface

This register map is for the iEM3150.

Communication settings: iEM3150

Protocol: Modbus RTU over RS-485
Unit address: 1 to 247
Baud rate: 9600, 19200 or 38400 bit/s
Parity: Even, odd or none, with 1 stop bit
Functions: FC03 read holding registers, FC16 write multiple registers, FC43/14 read device identification
Terminals: D0/- (A), D1/+ (B), 0V and shield
Cable: Shielded twisted pair, up to 2.5 mm² (14 AWG)
Port isolation: 4.0 kV rms
Settings lock: With Com. Protection enabled (the factory setting), communication settings change only from the front panel
Read with: FC03 (holding registers)
Word order: High word first on every value
Addresses: Zero-based PDU addresses, as sent on the bus

From iEM3100 / iEM3200 / iEM3300 series user manual (DOCA0005EN-16)¹.

Register map: iEM3150

Download

Point	Address	Hex	Format	Scale	Unit
Current L1	2999	`0x0BB7`	FLOAT32	×1	A
Current L2	3001	`0x0BB9`	FLOAT32	×1	A
Current L3	3003	`0x0BBB`	FLOAT32	×1	A
Average Current	3009	`0x0BC1`	FLOAT32	×1	A
Voltage L1-L2	3019	`0x0BCB`	FLOAT32	×1	V
Voltage L2-L3	3021	`0x0BCD`	FLOAT32	×1	V
Voltage L3-L1	3023	`0x0BCF`	FLOAT32	×1	V
Average Voltage L-L	3025	`0x0BD1`	FLOAT32	×1	V
Voltage L1-N	3027	`0x0BD3`	FLOAT32	×1	V
Voltage L2-N	3029	`0x0BD5`	FLOAT32	×1	V
Voltage L3-N	3031	`0x0BD7`	FLOAT32	×1	V
Average Voltage L-N	3035	`0x0BDB`	FLOAT32	×1	V
Active Power L1	3053	`0x0BED`	FLOAT32	×1	kW
Active Power L2	3055	`0x0BEF`	FLOAT32	×1	kW
Active Power L3	3057	`0x0BF1`	FLOAT32	×1	kW
Total Active Power	3059	`0x0BF3`	FLOAT32	×1	kW
Total Power Factor	3083	`0x0C0B`	FLOAT32	×1	-
Frequency	3109	`0x0C25`	FLOAT32	×1	Hz
Total Active Energy Import	45099	`0xB02B`	FLOAT32	×1	kWh
Partial Active Energy Import	45107	`0xB033`	FLOAT32	×1	kWh
Active Energy Import L1	45111	`0xB037`	FLOAT32	×1	kWh
Active Energy Import L2	45113	`0xB039`	FLOAT32	×1	kWh
Active Energy Import L3	45115	`0xB03B`	FLOAT32	×1	kWh

Download the iEM3150 register map as CSV

This register map is for the iEM3155.

Communication settings: iEM3155

Protocol: Modbus RTU over RS-485
Unit address: 1 to 247
Baud rate: 9600, 19200 or 38400 bit/s
Parity: Even, odd or none, with 1 stop bit
Functions: FC03 read holding registers, FC16 write multiple registers, FC43/14 read device identification
Terminals: D0/- (A), D1/+ (B), 0V and shield
Cable: Shielded twisted pair, up to 2.5 mm² (14 AWG)
Port isolation: 4.0 kV rms
Settings lock: With Com. Protection enabled (the factory setting), communication settings change only from the front panel
Read with: FC03 (holding registers)
Word order: High word first on every value
Addresses: Zero-based PDU addresses, as sent on the bus

From iEM3100 / iEM3200 / iEM3300 series user manual (DOCA0005EN-16)¹.

Register map: iEM3155

Download

Point	Address	Hex	Format	Scale	Unit
Current L1	2999	`0x0BB7`	FLOAT32	×1	A
Current L2	3001	`0x0BB9`	FLOAT32	×1	A
Current L3	3003	`0x0BBB`	FLOAT32	×1	A
Average Current	3009	`0x0BC1`	FLOAT32	×1	A
Voltage L1-L2	3019	`0x0BCB`	FLOAT32	×1	V
Voltage L2-L3	3021	`0x0BCD`	FLOAT32	×1	V
Voltage L3-L1	3023	`0x0BCF`	FLOAT32	×1	V
Average Voltage L-L	3025	`0x0BD1`	FLOAT32	×1	V
Voltage L1-N	3027	`0x0BD3`	FLOAT32	×1	V
Voltage L2-N	3029	`0x0BD5`	FLOAT32	×1	V
Voltage L3-N	3031	`0x0BD7`	FLOAT32	×1	V
Average Voltage L-N	3035	`0x0BDB`	FLOAT32	×1	V
Active Power L1	3053	`0x0BED`	FLOAT32	×1	kW
Active Power L2	3055	`0x0BEF`	FLOAT32	×1	kW
Active Power L3	3057	`0x0BF1`	FLOAT32	×1	kW
Total Active Power	3059	`0x0BF3`	FLOAT32	×1	kW
Total Reactive Power	3067	`0x0BFB`	FLOAT32	×1	kVAR
Total Apparent Power	3075	`0x0C03`	FLOAT32	×1	kVA
Total Power Factor	3083	`0x0C0B`	FLOAT32	×1	-
Frequency	3109	`0x0C25`	FLOAT32	×1	Hz
Total Active Energy Import	45099	`0xB02B`	FLOAT32	×1	kWh
Total Active Energy Export	45101	`0xB02D`	FLOAT32	×1	kWh
Total Reactive Energy Import	45103	`0xB02F`	FLOAT32	×1	kVARh
Total Reactive Energy Export	45105	`0xB031`	FLOAT32	×1	kVARh
Partial Active Energy Import	45107	`0xB033`	FLOAT32	×1	kWh
Partial Reactive Energy Import	45109	`0xB035`	FLOAT32	×1	kVARh
Active Energy Import L1	45111	`0xB037`	FLOAT32	×1	kWh
Active Energy Import L2	45113	`0xB039`	FLOAT32	×1	kWh
Active Energy Import L3	45115	`0xB03B`	FLOAT32	×1	kWh

Download the iEM3155 register map as CSV

This register map is for the iEM3250.

Communication settings: iEM3250

Protocol: Modbus RTU over RS-485
Unit address: 1 to 247
Baud rate: 9600, 19200 or 38400 bit/s
Parity: Even, odd or none, with 1 stop bit
Functions: FC03 read holding registers, FC16 write multiple registers, FC43/14 read device identification
Terminals: D0/- (A), D1/+ (B), 0V and shield
Cable: Shielded twisted pair, up to 2.5 mm² (14 AWG)
Port isolation: 4.0 kV rms
Settings lock: With Com. Protection enabled (the factory setting), communication settings change only from the front panel
Read with: FC03 (holding registers)
Word order: High word first on every value
Addresses: Zero-based PDU addresses, as sent on the bus

From iEM3100 / iEM3200 / iEM3300 series user manual (DOCA0005EN-16)¹.

Register map: iEM3250

Download

Point	Address	Hex	Format	Scale	Unit
Current L1	2999	`0x0BB7`	FLOAT32	×1	A
Current L2	3001	`0x0BB9`	FLOAT32	×1	A
Current L3	3003	`0x0BBB`	FLOAT32	×1	A
Average Current	3009	`0x0BC1`	FLOAT32	×1	A
Voltage L1-L2	3019	`0x0BCB`	FLOAT32	×1	V
Voltage L2-L3	3021	`0x0BCD`	FLOAT32	×1	V
Voltage L3-L1	3023	`0x0BCF`	FLOAT32	×1	V
Average Voltage L-L	3025	`0x0BD1`	FLOAT32	×1	V
Voltage L1-N	3027	`0x0BD3`	FLOAT32	×1	V
Voltage L2-N	3029	`0x0BD5`	FLOAT32	×1	V
Voltage L3-N	3031	`0x0BD7`	FLOAT32	×1	V
Average Voltage L-N	3035	`0x0BDB`	FLOAT32	×1	V
Active Power L1	3053	`0x0BED`	FLOAT32	×1	kW
Active Power L2	3055	`0x0BEF`	FLOAT32	×1	kW
Active Power L3	3057	`0x0BF1`	FLOAT32	×1	kW
Total Active Power	3059	`0x0BF3`	FLOAT32	×1	kW
Total Power Factor	3083	`0x0C0B`	FLOAT32	×1	-
Frequency	3109	`0x0C25`	FLOAT32	×1	Hz
Total Active Energy Import	45099	`0xB02B`	FLOAT32	×1	kWh
Partial Active Energy Import	45107	`0xB033`	FLOAT32	×1	kWh
Active Energy Import L1	45111	`0xB037`	FLOAT32	×1	kWh
Active Energy Import L2	45113	`0xB039`	FLOAT32	×1	kWh
Active Energy Import L3	45115	`0xB03B`	FLOAT32	×1	kWh

Download the iEM3250 register map as CSV

This register map is for the iEM3255.

Communication settings: iEM3255

Protocol: Modbus RTU over RS-485
Unit address: 1 to 247
Baud rate: 9600, 19200 or 38400 bit/s
Parity: Even, odd or none, with 1 stop bit
Functions: FC03 read holding registers, FC16 write multiple registers, FC43/14 read device identification
Terminals: D0/- (A), D1/+ (B), 0V and shield
Cable: Shielded twisted pair, up to 2.5 mm² (14 AWG)
Port isolation: 4.0 kV rms
Settings lock: With Com. Protection enabled (the factory setting), communication settings change only from the front panel
Read with: FC03 (holding registers)
Word order: High word first on every value
Addresses: Zero-based PDU addresses, as sent on the bus

From iEM3100 / iEM3200 / iEM3300 series user manual (DOCA0005EN-16)¹.

Register map: iEM3255

Download

Point	Address	Hex	Format	Scale	Unit
Current L1	2999	`0x0BB7`	FLOAT32	×1	A
Current L2	3001	`0x0BB9`	FLOAT32	×1	A
Current L3	3003	`0x0BBB`	FLOAT32	×1	A
Average Current	3009	`0x0BC1`	FLOAT32	×1	A
Voltage L1-L2	3019	`0x0BCB`	FLOAT32	×1	V
Voltage L2-L3	3021	`0x0BCD`	FLOAT32	×1	V
Voltage L3-L1	3023	`0x0BCF`	FLOAT32	×1	V
Average Voltage L-L	3025	`0x0BD1`	FLOAT32	×1	V
Voltage L1-N	3027	`0x0BD3`	FLOAT32	×1	V
Voltage L2-N	3029	`0x0BD5`	FLOAT32	×1	V
Voltage L3-N	3031	`0x0BD7`	FLOAT32	×1	V
Average Voltage L-N	3035	`0x0BDB`	FLOAT32	×1	V
Active Power L1	3053	`0x0BED`	FLOAT32	×1	kW
Active Power L2	3055	`0x0BEF`	FLOAT32	×1	kW
Active Power L3	3057	`0x0BF1`	FLOAT32	×1	kW
Total Active Power	3059	`0x0BF3`	FLOAT32	×1	kW
Total Reactive Power	3067	`0x0BFB`	FLOAT32	×1	kVAR
Total Apparent Power	3075	`0x0C03`	FLOAT32	×1	kVA
Total Power Factor	3083	`0x0C0B`	FLOAT32	×1	-
Frequency	3109	`0x0C25`	FLOAT32	×1	Hz
Total Active Energy Import	45099	`0xB02B`	FLOAT32	×1	kWh
Total Active Energy Export	45101	`0xB02D`	FLOAT32	×1	kWh
Total Reactive Energy Import	45103	`0xB02F`	FLOAT32	×1	kVARh
Total Reactive Energy Export	45105	`0xB031`	FLOAT32	×1	kVARh
Partial Active Energy Import	45107	`0xB033`	FLOAT32	×1	kWh
Partial Reactive Energy Import	45109	`0xB035`	FLOAT32	×1	kVARh
Active Energy Import L1	45111	`0xB037`	FLOAT32	×1	kWh
Active Energy Import L2	45113	`0xB039`	FLOAT32	×1	kWh
Active Energy Import L3	45115	`0xB03B`	FLOAT32	×1	kWh

Download the iEM3255 register map as CSV

This register map is for the iEM3350.

Communication settings: iEM3350

Protocol: Modbus RTU over RS-485
Unit address: 1 to 247
Baud rate: 9600, 19200 or 38400 bit/s
Parity: Even, odd or none, with 1 stop bit
Functions: FC03 read holding registers, FC16 write multiple registers, FC43/14 read device identification
Terminals: D0/- (A), D1/+ (B), 0V and shield
Cable: Shielded twisted pair, up to 2.5 mm² (14 AWG)
Port isolation: 4.0 kV rms
Settings lock: With Com. Protection enabled (the factory setting), communication settings change only from the front panel
Read with: FC03 (holding registers)
Word order: High word first on every value
Addresses: Zero-based PDU addresses, as sent on the bus

From iEM3100 / iEM3200 / iEM3300 series user manual (DOCA0005EN-16)¹.

Register map: iEM3350

Download

Point	Address	Hex	Format	Scale	Unit
Current L1	2999	`0x0BB7`	FLOAT32	×1	A
Current L2	3001	`0x0BB9`	FLOAT32	×1	A
Current L3	3003	`0x0BBB`	FLOAT32	×1	A
Average Current	3009	`0x0BC1`	FLOAT32	×1	A
Voltage L1-L2	3019	`0x0BCB`	FLOAT32	×1	V
Voltage L2-L3	3021	`0x0BCD`	FLOAT32	×1	V
Voltage L3-L1	3023	`0x0BCF`	FLOAT32	×1	V
Average Voltage L-L	3025	`0x0BD1`	FLOAT32	×1	V
Voltage L1-N	3027	`0x0BD3`	FLOAT32	×1	V
Voltage L2-N	3029	`0x0BD5`	FLOAT32	×1	V
Voltage L3-N	3031	`0x0BD7`	FLOAT32	×1	V
Average Voltage L-N	3035	`0x0BDB`	FLOAT32	×1	V
Active Power L1	3053	`0x0BED`	FLOAT32	×1	kW
Active Power L2	3055	`0x0BEF`	FLOAT32	×1	kW
Active Power L3	3057	`0x0BF1`	FLOAT32	×1	kW
Total Active Power	3059	`0x0BF3`	FLOAT32	×1	kW
Total Power Factor	3083	`0x0C0B`	FLOAT32	×1	-
Frequency	3109	`0x0C25`	FLOAT32	×1	Hz
Total Active Energy Import	45099	`0xB02B`	FLOAT32	×1	kWh
Partial Active Energy Import	45107	`0xB033`	FLOAT32	×1	kWh
Active Energy Import L1	45111	`0xB037`	FLOAT32	×1	kWh
Active Energy Import L2	45113	`0xB039`	FLOAT32	×1	kWh
Active Energy Import L3	45115	`0xB03B`	FLOAT32	×1	kWh

Download the iEM3350 register map as CSV

This register map is for the iEM3355.

Communication settings: iEM3355

Protocol: Modbus RTU over RS-485
Unit address: 1 to 247
Baud rate: 9600, 19200 or 38400 bit/s
Parity: Even, odd or none, with 1 stop bit
Functions: FC03 read holding registers, FC16 write multiple registers, FC43/14 read device identification
Terminals: D0/- (A), D1/+ (B), 0V and shield
Cable: Shielded twisted pair, up to 2.5 mm² (14 AWG)
Port isolation: 4.0 kV rms
Settings lock: With Com. Protection enabled (the factory setting), communication settings change only from the front panel
Read with: FC03 (holding registers)
Word order: High word first on every value
Addresses: Zero-based PDU addresses, as sent on the bus

From iEM3100 / iEM3200 / iEM3300 series user manual (DOCA0005EN-16)¹.

Register map: iEM3355

Download

Point	Address	Hex	Format	Scale	Unit
Current L1	2999	`0x0BB7`	FLOAT32	×1	A
Current L2	3001	`0x0BB9`	FLOAT32	×1	A
Current L3	3003	`0x0BBB`	FLOAT32	×1	A
Average Current	3009	`0x0BC1`	FLOAT32	×1	A
Voltage L1-L2	3019	`0x0BCB`	FLOAT32	×1	V
Voltage L2-L3	3021	`0x0BCD`	FLOAT32	×1	V
Voltage L3-L1	3023	`0x0BCF`	FLOAT32	×1	V
Average Voltage L-L	3025	`0x0BD1`	FLOAT32	×1	V
Voltage L1-N	3027	`0x0BD3`	FLOAT32	×1	V
Voltage L2-N	3029	`0x0BD5`	FLOAT32	×1	V
Voltage L3-N	3031	`0x0BD7`	FLOAT32	×1	V
Average Voltage L-N	3035	`0x0BDB`	FLOAT32	×1	V
Active Power L1	3053	`0x0BED`	FLOAT32	×1	kW
Active Power L2	3055	`0x0BEF`	FLOAT32	×1	kW
Active Power L3	3057	`0x0BF1`	FLOAT32	×1	kW
Total Active Power	3059	`0x0BF3`	FLOAT32	×1	kW
Total Reactive Power	3067	`0x0BFB`	FLOAT32	×1	kVAR
Total Apparent Power	3075	`0x0C03`	FLOAT32	×1	kVA
Total Power Factor	3083	`0x0C0B`	FLOAT32	×1	-
Frequency	3109	`0x0C25`	FLOAT32	×1	Hz
Total Active Energy Import	45099	`0xB02B`	FLOAT32	×1	kWh
Total Active Energy Export	45101	`0xB02D`	FLOAT32	×1	kWh
Total Reactive Energy Import	45103	`0xB02F`	FLOAT32	×1	kVARh
Total Reactive Energy Export	45105	`0xB031`	FLOAT32	×1	kVARh
Partial Active Energy Import	45107	`0xB033`	FLOAT32	×1	kWh
Partial Reactive Energy Import	45109	`0xB035`	FLOAT32	×1	kVARh
Active Energy Import L1	45111	`0xB037`	FLOAT32	×1	kWh
Active Energy Import L2	45113	`0xB039`	FLOAT32	×1	kWh
Active Energy Import L3	45115	`0xB03B`	FLOAT32	×1	kWh

Download the iEM3355 register map as CSV

Schneider's manual gives each register a hexadecimal address and a decimal register number one higher. The addresses on this page are the ones sent on the bus: register 3000 in the manual, current L1, is address 2999 (0x0BB7).¹

Energy is also available as 64-bit integers in watt-hours from register 3204. The maps use the Float32 copies in kilowatt-hours from register 45100, which hold the same totals.¹

The iEM3150, iEM3250 and iEM3350 do not answer reactive power, apparent power, export energy or reactive energy. Use the template for the exact model so Edge never polls a register the meter does not have.¹

Edge templates

This JSON file supplies the register map. Applying it to an existing meter replaces its sensor list while retaining the site connection, unit ID and enable state.

Model	Connection	Points	Version	Updated	Download
iEM3150	Modbus RTU over RS-485	23	1.0.0	21 Sep 2026	Download
iEM3155	Modbus RTU over RS-485	29	1.0.0	20 Sep 2026	Download
iEM3250	Modbus RTU over RS-485	23	1.0.0	21 Sep 2026	Download
iEM3255	Modbus RTU over RS-485	29	1.0.0	21 Sep 2026	Download
iEM3350	Modbus RTU over RS-485	23	1.0.0	21 Sep 2026	Download
iEM3355	Modbus RTU over RS-485	29	1.0.0	21 Sep 2026	Download

Downloads need a signed-in account with Edge download access.

Use the template in Edge

Import the JSON file
On the target Gateway in Edge, open Settings, then Device Templates. Choose Import and select the downloaded JSON file. Confirm that the model and template name match your device.
Load the map for your meter
In the Modbus device wizard, choose the site connection and unit ID, then use Load Template to select the imported map. For an existing device, apply the template to that exact model. Its connection, unit ID and enable state are retained.
Test a reading
Use Test in the wizard and compare a known reading with the meter display. Check its unit, sign and scale, then confirm that timestamps keep advancing. These starter maps are read-only and leave exports off until you configure them.

Setup

Check the model
Only the iEM3150, iEM3155, iEM3250, iEM3255, iEM3350 and iEM3355 have a Modbus port. The iEM3135, iEM3235 and iEM3335 are M-Bus, the iEM3165, iEM3265 and iEM3365 are BACnet, and the iEM3175, iEM3275 and iEM3375 are LonWorks.¹
Wire the bus
Run shielded twisted pair from the meter's D0/- and D1/+ terminals to A and B on a ZMB-31 or the Gateway's serial interface, with 0V to the common. The terminals take wire up to 2.5 mm².¹
Set address and speed
Hold the two setup buttons together for about 2 seconds and enter the password (0010 from the factory). Under Communication, give the meter a unique address from 1 to 247 and set the baud rate and parity. Set Edge to match, with one stop bit.¹
Read one register
Import the template for your exact model, then read Voltage L1-N at address 3027 (register 3028 in the manual). It arrives in volts and should match the display with no scaling.¹
Enable the map
Once voltage, current and total active power match the display, enable the rest of the map and watch several fresh readings before you add exports or alarms.

Before you rely on the decode

iEM3150 only: 23 Float32 values, from current to active import energy. Schneider does not provide reactive power, apparent power or export energy on this model.

iEM3155 only: 29 Float32 values, including reactive and apparent power and export energy. Tariff counters, input metering and the digital input and output are left out.

iEM3250 only: 23 Float32 values, from current to active import energy. Schneider does not provide reactive power, apparent power or export energy on this model.

iEM3255 only: 29 Float32 values, including reactive and apparent power and export energy. Tariff counters, input metering and the digital input and output are left out.

iEM3350 only: 23 Float32 values, from current to active import energy. Schneider does not provide reactive power, apparent power or export energy on this model.

iEM3355 only: 29 Float32 values, including reactive and apparent power and export energy. Tariff counters, input metering and the digital input and output are left out.

Common questions

Which iEM3000 meters have Modbus?: The iEM3150, iEM3155, iEM3250, iEM3255, iEM3350 and iEM3355. Their order references are A9MEM3150 to A9MEM3355 with the same digits. The other communicating models use M-Bus, BACnet or LonWorks.^1, 3
What is the difference between the iEM3150 and the iEM3155?: Both measure up to 63 A directly and speak Modbus. The iEM3155 adds MID approval, four-quadrant energy with reactive and apparent power, four tariffs, one digital input, one digital output and an overload alarm. The iEM3150 has none of those, so it answers fewer registers.^1, 2
Why are the addresses one lower than in the Schneider manual?: The manual lists a register number and an address for every value, and the register number is the address plus one. The address is what goes on the bus. This page and the Edge templates use the address, so register 3000 in the manual is 2999 here.¹
Do I need to swap words on the iEM3000?: No. The measurements are IEEE 754 32-bit floats sent high word first, which Edge reads as big-endian with no word or byte swap. There is no multiplier to set either.^1, 4
Can the iEM3155 be used for billing?: The iEM3155, iEM3255 and iEM3355 comply with the Measuring Instruments Directive and the UK MIR. To keep that approval, install them in a cabinet rated IP51 or better and set the wiring type to 3PH4W or 1PH4W. The iEM3150, iEM3250 and iEM3350 are not MID approved.¹
Why can I not change the address over Modbus?: The Com. Protection setting is enabled from the factory. While it is on, communication settings, wiring, date and time and the tariffs can only be changed from the front panel.¹