Gossen MetraWatt ENERGYMID EM2281 User manual

ENERGYMID
MULTIFUNCTIONAL ENERGY METERS
EM2281, EM2289 – DIRECT CONNECTION
EM2381, EM 2387, EM2389 – TRANSFORMER
CONNECTION
2/10.22
3-447-121-03
Operating
Instructions

CONTENTS
ENERGYMID 2 | 64
CONTENTS
1 Safety Instructions ..............................................................................................................................................................................5
2 Applications ........................................................................................................................................................................................6
2.1 Intended Use / Use for Intended Purpose ...........................................................................................................6
2.2 Use for Other than Intended Purpose..................................................................................................................6
2.3 Liability and Guarantee........................................................................................................................................6
3 Documentation....................................................................................................................................................................................7
3.1 Information Concerning these Instructions ..........................................................................................................7
3.2 Identification of Warnings ....................................................................................................................................7
3.3 Identifiers ............................................................................................................................................................8
3.4 Definition of Terms ..............................................................................................................................................8
4 Getting Started....................................................................................................................................................................................9
5 The Instrument..................................................................................................................................................................................10
5.1 Scope of Delivery..............................................................................................................................................10
5.2 Optional Accessories ........................................................................................................................................10
5.3 Instrument Overview .........................................................................................................................................10
5.3.1 Front.........................................................................................................................................................10
5.3.2 Side View..................................................................................................................................................11
5.4 Dimensional Drawing ........................................................................................................................................11
5.5 Tamper-Proof Sealing .......................................................................................................................................12
5.6 Connections .....................................................................................................................................................12
5.7 Symbols on the Instrument and the Included Accessories.................................................................................13
5.8 Relevant Standards, Regulations and Directives................................................................................................14
5.9 Technical Data ..................................................................................................................................................15
5.10 Characteristic Values ........................................................................................................................................18
5.10.1 Measuring ranges .....................................................................................................................................18
5.10.2 Inputs, outputs and interfaces...................................................................................................................18
5.10.3 Tariff Inputs...............................................................................................................................................18
5.10.4 Pulse Outputs...........................................................................................................................................18
5.10.5 Bus Interfaces...........................................................................................................................................19
5.10.6 Block Diagram for Safety Specification......................................................................................................20
5.11 OBIS Figures.....................................................................................................................................................20
6 Initial Startup ....................................................................................................................................................................................21
6.1 Unpacking ........................................................................................................................................................21
6.2 Installation.........................................................................................................................................................21
6.2.1 Mounting ..................................................................................................................................................22
6.2.2 Connection...............................................................................................................................................23
6.2.3 Display of Connection Errors and Troubleshooting....................................................................................28
6.2.4 Sealing .....................................................................................................................................................28
6.3 Connection to Your Equipment (interfaces) .......................................................................................................28
6.3.1 LON Installation (feature W1).....................................................................................................................28
6.3.2 M-Bus Installation (feature W2) .................................................................................................................29
6.3.3 TCP/IP – BACnet, Modbus TCP, HTTP (feature W4).................................................................................29
6.3.4 Modbus RTU (feature W7) ........................................................................................................................29

CONTENTS
3 | 64 ENERGYMID
7 Display and Operation.......................................................................................................................................................................30
7.1 Display............................................................................................................................................................. 30
7.2 Test LEDs ........................................................................................................................................................ 32
7.3 Keys ................................................................................................................................................................ 32
7.3.1 UP and ENTER ........................................................................................................................................ 32
7.3.2 Enable Key .............................................................................................................................................. 33
8 Configuration and Operation .............................................................................................................................................................34
8.1 Display of Active and Reactive Energy, as well as Active and Reactive Power ..................................................35
8.1.1 Displaying Inductive Reactive Energy and Reactive Power (only with feature M2/M3) ............................... 35
8.1.2 Displaying Active Energy and Active Power Export................................................................................... 35
8.1.3 Displaying Capacitive Reactive Energy and Reactive Power (only with feature M2/M3)............................. 35
8.1.4 Displaying Total Active Energy Import (all)
and Reactive Energy Import (only with feature M2/M3)............................................................................. 36
8.1.5 Displaying Total Active Energy Export (all)
and Reactive Energy Import (only with feature M2/M3)............................................................................. 36
8.2 Switching Amongst Tariffs................................................................................................................................ 36
8.2.1 Displaying Active Energy
and Reactive Energy (only with feature M2, M3) ....................................................................................... 36
8.2.2 Displaying Total Active Energy
and Total Reactive Energy Import (only with feature M2, M3) ................................................................... 38
8.3 Power Displays (feature M1/M3 only) ............................................................................................................... 40
8.3.1 4-Wire Displays........................................................................................................................................ 40
8.3.2 3-Wire Displays........................................................................................................................................ 41
8.3.3 2-Wire Displays........................................................................................................................................ 41
8.4 Mains Monitor (only with feature M1/M3).......................................................................................................... 42
8.4.1 4-Wire Displays........................................................................................................................................ 42
8.4.2 3-Wire Displays........................................................................................................................................ 43
8.4.3 2-Wire Displays........................................................................................................................................ 43
8.5 S0 Pulse Output (only with feature W0) ............................................................................................................ 44
8.5.1 Displaying Pulse Frequency ..................................................................................................................... 44
8.5.2 Adjusting Pulse Frequency (only with feature V2, V4)................................................................................ 44
8.5.3 Displaying Pulse Duration......................................................................................................................... 45
8.5.4 Adjusting Pulse Duration (only with feature V2, V4)................................................................................... 45
8.5.5 Displaying the Pulse Source..................................................................................................................... 45
8.5.6 Selecting Pulse Sources (only with feature V2, V4) ................................................................................... 46
8.6 Transformation Ratio (EM2381, EM2387 and EM2389 only) ............................................................................ 47
8.6.1 Displaying the Current Transformation Ratio (CT) ..................................................................................... 47
8.6.2 Setting the Current Transformation Ratio (CT) (only with feature Q1) ........................................................ 47
8.6.3 Displaying the Voltage Transformation Ratio (VT)...................................................................................... 47
8.6.4 Setting the Voltage Transformation Ratio (VT) (only with feature Q1)......................................................... 48
8.7 Bus Connections (features W1, W2,W4, W7) ................................................................................................... 49
8.8 Meter Reading Profile....................................................................................................................................... 49
8.8.1 Meter Reading Profile Z1.......................................................................................................................... 49
8.8.2 Meter Reading Profile Z2.......................................................................................................................... 50
8.9 Firmware Version ............................................................................................................................................. 51
8.10 Display Test ..................................................................................................................................................... 51
8.11 Calibration Display ........................................................................................................................................... 52
8.11.1 Activating the Calibration Display ............................................................................................................. 52
8.11.2 Pinned Calibration Display / Live Values ................................................................................................... 52

CONTENTS
ENERGYMID 4 | 64
9 Error ..................................................................................................................................................................................................53
9.1 Power Failure....................................................................................................................................................53
9.2 Fault Conditions and Troubleshooting ...............................................................................................................53
10 Maintenance .....................................................................................................................................................................................54
10.1 Cleaning ...........................................................................................................................................................54
10.2 Recalibration.....................................................................................................................................................54
10.3 Repairs .............................................................................................................................................................56
11 Removal from Service and Dismantling............................................................................................................................................57
11.1 Disconnection from the Power Supply ..............................................................................................................57
11.2 Dismantling.......................................................................................................................................................58
12 Transport and Storage ......................................................................................................................................................................59
13 Contact, Support and Service ...........................................................................................................................................................60
14 Disposal and Environmental Protection ............................................................................................................................................61
15 Certifications.....................................................................................................................................................................................62
15.1 CE Declaration..................................................................................................................................................62
15.2 Calibration Certificate (with feature P9 only).......................................................................................................62
15.3 Prototype Test Certificate..................................................................................................................................62
15.4 National Declaration of Conformity ....................................................................................................................62

SAFETY INSTRUCTIONS
5 | 64 ENERGYMID
1 SAFETY INSTRUCTIONS
General
 Carefully and completely read and adhere to these operating instructions.
The respective document can be found at http://www.gossenmetrawatt.com. Retain the document for future reference.
 The instrument may only be used for the measurements described in the documentation for the instrument.
Work Performed on the Instrument
 Work performed on the instrument may only be carried out by a qualified electrician.
 Wear suitable and appropriate personal protective equipment (PPE) whenever working with the instrument.
 Observe and comply with all safety regulations which are applicable for your work environment.
 The respective system, as well as all connection cables and leads, must be voltage-free before any work is performed
on the instrument.
 When performing work on the instrument, observe the five safety rules in accordance with DIN VDE 0105-100, Operation
of electrical installations – Part 100: General requirements
(1. Shut down entirely. 2. Secure against restart. 3. Assure absence of voltage at all poles. 4. Ground and short circuit.
5. Cover neighboring live components, or make them inaccessible.).
Operation
 Only operate the instrument if it’s in good working order.
Inspect the instrument at regular intervals. Pay particular attention to damage.
 Connection cables and leads must be damage-free.
Inspect connection cables and leads at regular intervals. Pay particular attention to damage, interrupted insulation or
kinked cables.
 The instrument may only be operated in environments which comply with the specified technical data and conditions
(ambient conditions, IP protection code, measuring category, nominal voltage etc.).
 The instrument must not be exposed to direct sunlight.
 Do not operate the instrument in potentially explosive atmospheres.
 If the instrument doesn’t function flawlessly, permanently remove it from operation and secure it against inadvertent use.
Data Security and Protection
 The instrument determines values with relevance for billing. Observe and comply with currently valid regulations for data
security and protection.
Read and follow these instructions carefully and completely
in order to ensure safe and proper use.
Keep for future reference.

APPLICATIONS
ENERGYMID 6 | 64
2 APPLICATIONS
Please read this important information!
2.1 INTENDED USE / USE FOR INTENDED PURPOSE
ENERGYMID EM2281, EM2289, EM2381, EM2387 and EM2389 instruments are multifunctional energy meters (certified in
accordance with MID – Measuring Instruments Directive 2014/32/EU).
They’re used for the acquisition and billing of active energy, e.g. in industrial, household, commercial and building manage-
ment applications. Integrated 4-quadrant measurement permits measurement of energy import and export. 4 tariffs (hard-
ware-controlled as standard feature) and, depending on model or version, 4 additional tariffs (software-controlled) can be
selected.
Thanks to MID certification, acquired data (display) can also be used for the purpose of billing energy costs to third parties.
 EM2281 (article no. U2281): for 2 wire system, 230 V, direct connection, 5(80) A
 EM2289 (article no. U2289): for 4-wire system, any load, direct connection, 5(80) A
 EM2381 (article no. U2381): for 2 wire system, 230 V, transformer connection 1(6) A (including 5(6) A)
 EM2387 (article no. U2387): for 3-wire system, any load, transformer connection,1(6) A (including 5(6) A)
 EM2389 (article no. U2389): for 4-wire system, any load, transformer connection, 1(6) A (including 5(6) A)
Technical properties and other functions are defined via configurable features (e.g. pulse output, type of bus connection and
meter reading profile). This results in individualized, device-specific variants when placing orders. Refer to the data sheet and
your order for your instrument variant and its features.
All instruments include measures for protection against tampering (tamper-proof cover and configuration disabling).
Values are also forwarded to superordinate management systems via feature-dependent communication interfaces, e.g. for
acquisition and optimization, as well as for building automation and control technology).
ENERGYMID energy meters are ideally suited for use with other components included in GOSSEN METRAWATT’s Energy
Control System (ECS) for the implementation of comprehensive systems for energy data collection: data from ENERGYMID
energy meters can be retrieved by means of summators and data loggers, e.g. the SU1604 or SMARTCONTROL, and can
be consolidated in energy management software, e.g. EMC 5.x. All relevant consumption data can then be archived, dis-
played, analyzed and billed.1
Safety of the operator, as well as that of the instrument, is only assured when it’s used for its intended purpose.
2.2 USE FOR OTHER THAN INTENDED PURPOSE
Using the instrument for any purposes other than those described in the condensed operating instructions or these instru-
ment operating instructions is contrary to use for intended purpose.
2.3 LIABILITY AND GUARANTEE
Gossen Metrawatt GmbH assumes no liability for property damage, personal injury or consequential damage resulting from
improper or incorrect use of the product, in particular due to failure to observe the product documentation. Furthermore, all
guarantee claims are rendered null and void in such cases.
Nor does Gossen Metrawatt GmbH accept any liability for data loss.
1. Refer to https://www.gmc-instruments.de/en/ for information concerning additionally available components.

DOCUMENTATION
7 | 64 ENERGYMID
3 DOCUMENTATION
3.1 INFORMATION CONCERNING THESE INSTRUCTIONS
Read these instructions attentively and carefully. They include information which protects your and others from injury, and
prevents damage to the instrument.
Descriptions of Instrument Variants
This documentation describes the following instruments and their variants: ENERGYMID EM2281, EM2289, EM2381,
EM2387 und EM2389.
As a result, features and functions may be described which do not apply to your instrument. Furthermore, images may differ
from your instrument or represent only one of several possible variants. Illustrations must therefore be regarded as repre-
sentative examples.
Errors and Suggestions for Improvement
These instructions have been prepared with utmost care in order to ensure correctness and completeness. Unfortunately,
errors can never be entirely avoided. Continuous improvement is part of our quality goal, so we always appreciate your com-
ments and suggestions.
Gender Equality
For better readability, only the masculine form is used in these instructions in a grammatically impartial sense. The female
and diverse forms are of course always implied as well.
Trademark Law
Product designations used in this document may be subject to trademark law, brand law and patent law. They are the prop-
erty of their respective owners.
Copyright
This document is protected by copyright. Content modifications, reproduction, duplication, processing or translation in any
form (including excerpts) are only permissible after obtaining written permission from Gossen Metrawatt GmbH. This applies
in particular to storage and processing in electronic systems.
3.2 IDENTIFICATION OF WARNINGS
Instructions for your safety and for the protection of the instrument and its environment are provided as warnings and notes
at certain points within these instructions. They’re laid out as shown below and are graded in terms of the severity of the
respective hazard. They also describe the nature and cause of the hazard and what must be done to avoid it.
DANGER
Death or serious injury is almost certain.
WARNUNG
Death or serious injury is possible.
CAUTION
Minor or moderate injury is possible.
ATTENTION
Damage to the product or the environment is possible.

DOCUMENTATION
ENERGYMID 8 | 64
3.3 IDENTIFIERS
The following identifiers are used in this documentation:
3.4 DEFINITION OF TERMS
Note
Important information
Tip
Useful additional information or application tip
Identifier/Symbol Meaning
Control Element Keys, buttons, menus and other controls
Prerequisite A condition etc. which must be fulfilled before a given action can be taken
Procedure Beginning of a procedural instruction
1. Procedural step Steps of a procedure which must be completed in the specified order
Result Result of a procedural step
 Enumeration
Enumeration
Bullet lists
Figure 1: Caption Description of the content of a figure
Table 1: Table 1: Description of the content of a table
Footnote Comment
Instrument Energy meters ENERGYMID EM2281, EM2289, EM2381, EM2387 und EM2389.
Feature Product feature (e.g. bus connection type, pulse output, measurement of reactive energy) –
used to configure the instrument variant and is specified when the order is placed
Meter reading profile A series of meter readings taken every 15 minutes with a discrete time interval and a time-
stamp
Feature Z1: Adjustable time interval
Feature Z2: Fixed time interval, every 15 minutes (in accordance with PTB-A 50.7 and
PTB-A 50.7-1) – with operating logbook and calibration logbook (recorded for 4 years)

GETTING STARTED
9 | 64 ENERGYMID
4 GETTING STARTED
1. Read and adhere to the product documentation. In particular observe all safety information in the documentation, on
the tester and on the packaging.
Safety Instructions 5
Applications 6
Documentation 7
2. Familiarize yourself with the instrument and its features 10.
3. Start up the instrument 21.
4. Familiarize yourself with the display and instrument operation 30.
5. Configuration and operation 34:
Display of active and reactive energy, as well as active and reactive power 35
Switching amongst tariffs 36
Power displays (feature M2/M3 only) 40
Mains monitor (only with feature M1/M3) 42
S0 pulse output (only with feature W0) 44
Transformation ratio (EM2381, EM2387 and EM2389 only) 47
Bus connections (features W1, W2,W4, W7) 49
Meter reading profile 49
Firmware version 51
Display test 51
Calibration display 52
Further topics of interest: Maintenance 54

THE INSTRUMENT
ENERGYMID 10 | 64
5 THE INSTRUMENT
5.1 SCOPE OF DELIVERY
Please check for completeness.
5.2 OPTIONAL ACCESSORIES
5.3 INSTRUMENT OVERVIEW
5.3.1 FRONT
Figure 6: Front Panel
1Energymeter
2 Condensed operating instructions (German, English)
1 Calibration certificate (with feature P9 only)
U270B Door mounting kit for energy meter, 4 or 7 standard width units
Article Number
ENTER Key
UP Key
Prototype Test Certificate:
DE MTP 17 B 002 MI-003
(EM228x)
DE MTP 16 B 004 MI-003
(EM238x)
DE MTP 20 B 004
(EM228x Z2)
DE MTP 20 B 005
(EM238x Z2)
Accuracy Class,
Operating Tempera-
ture Range
Imin - In (Imax),
Nominal Frequency
LEDs
100,000 pls/kWh
Energy Export,
Energy Import
Serial Number
LED Constant
QR Code
or Calibration Mark (with feature P9)
Year of Manufacture
Symbol for Mains
Type
Protective Insulation
(protection category II)
Bidirectional Meter
(anti-reversing for the
registers in both energy
directions)
Warning
(observe documentation)
Type Designation
Metrology Mark
Display
Terminal Cover
(closed)

THE INSTRUMENT
11 | 64 ENERGYMID
5.3.2 SIDE VIEW
Figure 7: Instrument, Side View
5.4 DIMENSIONAL DRAWING
Pulse Output or Bus Connections (feature-dependent)
Feature-Dependent:
W1: Neuron ID
W4: MAC Address
Tariff Connections
Manufacturer’s Seal
12
1st Line: Serial Number
2nd Line: Features
Terminal Cover
(closed)
44
645
72–0.5
0
45
90
Top-Hat Rail per EN 50022 or
Snap-On Rail with C Profile
Dimensions Each: 35 × 15 mm or
35 × 7.5 mm

THE INSTRUMENT
ENERGYMID 12 | 64
5.5 TAMPER-PROOF SEALING
The instrument is provided with various seals in order to protect it against unauthorized modifications.
One manufacturer’s seal on the side:
Four tamper-proof seals for the terminal cover (can be mounted to the left and right of each terminal cover):
5.6 CONNECTIONS
Figure 8: Instrument Connections (here: EM2389 with W2 M-Bus interface)
The manufacturer’s seal serves as the instrument’s calibration and guar-
antee seal.
ATTENTION
Violation of Calibration Law
An instrument with a broken manufacturer’s seal may not be used for
billing purposes.
Never break or damage the manufacturer’s seal.
Manufacturer’s
Seal
Sealing Eyelet, Side View:
Sealing Eyelet
Sealing Eyelet
Sealing Eyelet
Sealing Eyelet
Enable Key
Tariff Connections
Pulse Output or Bus
Connections
(feature-dependent)
Current and
Voltage Connections
Terminal Cover
(open)
Terminal Cover
(open)
Terminal Labeling
(feature-dependent)
Terminal Labeling
(feature-dependent)
In Case of Z2: Additional
MessEV Conformity Marking

THE INSTRUMENT
13 | 64 ENERGYMID
5.7 SYMBOLS ON THE INSTRUMENT AND THE INCLUDED ACCESSORIES
Marking with stamp of the federally approved test laboratory
(for verification only / with feature P9)
CE and metrology mark
with indication of year (M22) and registration number of the notified body for module D, coun-
try-specific calibration validity period
Metrological symbol for national approval in Germany (DE = Germany, M = Metrology) with indi-
cation of year (22) and registration number of the notified body
DE MTP XX B XXX
DE MTP XX B XXX MI-XXX
Prototype Test Certificate:
DE MTP 17 B 002 MI-003 = EM2281, EM2289
DE MTP 16 B 004 MI-003 = EM2381, EM2387, EM2389
DE MTP 20 B 004 = EM2281, EM2289 each with Z2
DE MTP 20 B 005 = EM2381, EM2387, EM2389 each with Z2
Meter type: bidirectional meter
Energy received at the measuring point (i.e. import)
Energy supplied at the measuring point (i.e. export)
Anti-reversing
Mains type:
3-wire energy meter
Mains type:
2-wire energy meter
Double insulation (protection category II)
Warning concerning a point of danger
(attention, observe documentation!)
European conformity marking
The tester may not be disposed of with household trash "Disposal and Environmental Protec-
tion"61.
EBY
8
22
M22
1948
DE-M
1948
22
!

THE INSTRUMENT
ENERGYMID 14 | 64
5.8 RELEVANT STANDARDS, REGULATIONS AND DIRECTIVES
The instrument has been manufactured and tested in accordance with the following safety regulations.
ATTENTION
The design of the device does not release the user from the
obligation to comply with legal regulations.
Violation of legal regulations.
Always comply with all relevant legal regulations, for example the German
weights and measures act (MessEG) and the German measuring and
verification act (MessEV).
Note
The currently valid version of the respective standard always applies unless
a revision level is specified.
Directive 2014/32/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws
of the Member States relating to the making available on the market of measuring instruments (revision) text with EEA
relevance
DIN 43856 Electricity meters, tariff time switches and ripple control receivers; connection diagrams, terminal
marking, circuit diagrams
DIN 43880 Built-in equipment for electrical installations; overall dimensions and related mounting dimensions
DIN 46200 Current carrying connection bolts up to 1600 A; design and assignment of current intensities
EN 50470-1:2006 Electricity metering equipment (a.c.) – Part 1: General requirements, tests and test conditions –
Metering equipment (class indexes A, B and C)
EN 50470-3:2006 Electricity metering equipment (a.c.) – Part 3: Particular requirements – Static meters for active
energy (class indexes A, B and C)
EN 55022 Information technology equipment – Radio disturbance characteristics – Limits and methods of
measurement
EN 60529 Test instruments and test procedures – Degrees of protection provided by enclosures (IP code)
EN 61326-1 Electrical equipment for measurement, control and laboratory use – EMC requirements –
Part 1: General requirements
EN 62052-1 Electricity metering equipment – General requirements, tests and test conditions –
Part 11: Metering equipment
EN 62053-23 Electricity metering equipment (a.c.) - Particular requirements – Part 23: Static meters for reactive
energy (classes 2 and 3)
EN 62053-31 Electricity metering equipment (a.c.) – Particular requirements – Pulse output devices for electro-
mechanical and electronic meters (two wires only)
EN 62056-61 Electricity metering – Data exchange for meter reading, tariff and load control –
Part 61: Object identification system (OBIS)
PTB-A 50.7 Requirements for electronic and software-controlled measuring instruments and ancillary
equipment for electricity, gas, water and heat
PTB-A 50.7-1 Software requirements for measuring instruments and ancillary equipment according to
PTB-A 50.7 equipment class 1: Simple instrument

THE INSTRUMENT
15 | 64 ENERGYMID
5.9 TECHNICAL DATA
Some of the technical data are model and feature-dependent: You selected the device type and (optional) features when
you placed your order. All options are listed with corresponding identification in the following table. The features included
with your instrument can be found on the label on its side (10) or in your order documents. A breakdown of the features
can be found in the appendix 63.
Tab. 2: Technical Data
Continued on next page.
Connection EM2281, EM2289: Direct
EM2381, EM2387, EM2389: Via transformer
Measurement type 4-quadrant measurement
Multifunctional
version
Optional:
U, I, P, Q, S, PF, f, THD, IN(M1) /
reactive energy (M2) /
U, I, P, Q, S, PF, f, THD, INTHD, IN, reactive energy (M3) a
a. Not approved in Switzerland
Meter reading
profile Optional: meter reading profile (Z1) / certified meter reading profile PTB-A 50.7 (Z2)
Approval MID (conformity assessment procedure modules B and D)
Optional: additional calibration certificate (P9)
Accuracy class B for industrial and commercial use, as well as for household use with highly demanding require-
ments
Mains type
EM2281, EM2381: 2-wire system
EM2289, EM2389: 4-wire system
EM2387: 3-wire system
Current and
voltage ranges
Input voltage
(reference voltage UnAC):
EM2281: 230 V L–N (U5)
EM2289: 400 V L–L (U6)
EM2381: 230 V L–N (U5))
EM2387: 100 … 110 V L–L (U3) / 400 V L–L (U6) / 500 V L–L (U7)
EM2389: 100 … 110 V L–L (U3) / 400 V L–L (U6)
Nominal current
(current limit value):
EM2281, EM2289: 5 (80) A
EM2381, EM2387, EM2389: 1(6) A (including 5(6) A)
Power consumption
Total:
Single-phase: < 2 W (at nominal voltage)
3-phase: < 2 W (at nominal voltage)
(where line frequency = 45 … 65 Hz)
Internal power supply:
From measuring voltage U: 80 to 115% Ur
3.3 V / 100 mA
With W4: 3.3 V / 200 mA (plus 100 mA for Ethernet)
Voltage path, total
(including supply): < 2 VA
Per current path:
At Imax: < 1 VA for direct meter / < 0.2 VA for transformer meter
At Iref: < 0.02 VA for direct meter / < 0.005 VA for transformer
meter
Starting current: Direct meter: approx. 17 mA at 0.1 - 5(80) A
Transformer meter: approx. 1.5 mA at 0.01 - 1(6) A
Ambient
conditions
Operating temperature: -25 ... +55 °C
Storage temperature: -25 ... +70 °C
Relative atmospheric humid-
ity:
Max. 95%, no condensation allowed
Max. 75% annual average and non-condensing
Elevation: Max. 2000 m
Place of use Indoors

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ENERGYMID 16 | 64
Continued on next page.
Electrical
safety
Pollution degree: 2
Protection category: II
Insulating group: II
Utilization category
(electrical switchgear):
(only for meters with direct connection) UC-2
(per EN 60947)
Nominal insulation voltage:
Inputs: 300 VAC
Output: 50 VDC (bus/S0) with V0, V1, V2, V7, V8, V9
230 VAC (pulse) with V3, V4
Insulation test voltage:
Input output/housing: 4 kVAC
Output housing: 500 V (bus/S0) with V0, V1, V2,
V7, V8, V9
4 kV (pulse) with V3, V4
Overload capacity:
All meters: continuous 1.15 Urand Imax
Direct connection: 5 × 3 s, Urand 100 A (5 min. interval)
Direct connection: 1 × 1 s, Urand 250 A, 10 ms 2400 A
Current transformer connection: 0.5 s and 20 × Imax
Overvoltage category:
III (per EN 62052-31) for
feature U3: 63.5 (110) VAC
feature U5 / U6: 230 (400) VAC
Rated impulse voltage: 4 kV with basic insulation and 6 kV with reinforced insulation
Electromagnetic
compatibility (EMC)
Interference emission: EN 55022, class B
Interference immunity: EN 61326-1
Electromagnetic
classification E2
Mechanical
design
Mechanical classification: M1
Protection:
Front (panel-mount instrument): IP 51
(protection against ingress of solid foreign objects: protected against
harmful amounts of dust, protection against ingress of water:
protection against dripping water)
Terminals: IP 20
(protection against ingress of solid foreign objects: 12.5 mm dia.,
protection against ingress of water: not protected)
(per EN 60529 / IEC 60529)
Housing (W × H × D): 4 standard width units,
approx. 72 × 90 × 70 mm
Housing material: Lexan polycarbonate per UL94 V0
Weight: < 0.3 kg
Mounting: Top-hat rail per EN 50022 or snap-on rail with c profile,
dimensions each: 35 × 15 mm or 35 × 7.5 mm
Screw terminals: Slotted screws, 16 mm² cross-section
Display:
LCD, approx. 28 × 42 mm, 7-segment characters
(0 … 99,999,999 digits)
1 main display: max. 8-place, height: 5.6 mm,
2 auxiliary displays: 8-place, height: 5 mm
Refresh: approx. 6 times per second
Protection against tampering: Tamper-proof cover, configuration disabling

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17 | 64 ENERGYMID
Interfaces
The energy meters are equipped with two pulse outputs or one bus output as a standard feature.
Pulse output:
Model and feature-dependent, as well as optional:
S0 standard, calibrated, 1000 pls/kWh (V1) /
S0 programmable, 1 … 1000 pls/kWh sec. (V2 with EM2281,
EM2289) /
S0 programmable, 1 … 50,000 pls/kWh sec. (V2 with EM2381,
EM2387, EM2389) /
Switching output up to 230 V, calibrated, 1000 pls/kWh (V3)/
Switching output up to 230 V, programmable, 1 … 1000 pls/kWh (V4
with EM2281, EM2289) /
Switching output up to 230 V, programmable, 1 … 50,000 pls/kWh
(V4 with EM2381, EM2387, EM2389) /
S0 130 ms, calibrated,100 pls/kWh (V7 with EM2281, EM2289) /
S0 130 ms, calibrated,100 pls/kWh, in combination with Q9 depend-
ing on CT × VT (V7 with EM2381, EM2387, EM2389) /
S0 130 ms, calibrated,1000 pls/kWh (V8) /
Customer-specific S0, calibrated (V9)
See "Pulse Outputs"18 for further information.
Bus connection:
Optional:
LON (W1) / M-Bus (W2) / Modbus RTU (W7) /
TCP/IP (BACnet, Modbus TCP, HTTP) (W4)
See "Bus Interfaces"19 for further information.
Tariff interface: 4 tariffs (hardware controlled) and 4 additional tariffs via bus as option a
Power utility pulse:
a. The 4 additional tariffs via bus are not included in the scope of MID approval.
Transformer ra tio
EM2381, EM2387 and EM2389 only:
default: CT = VT = 1, main display for secondary, calibrated (Q0)
Feature-dependent alternative: CT and VT programmable, auxiliary display for secondary,
calibrated (Q1) / fixed CT and VT, main display for primary, calibrated (Q9)

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ENERGYMID 18 | 64
5.10 CHARACTERISTIC VALUES
5.10.1 MEASURING RANGES
5.10.2 INPUTS, OUTPUTS AND INTERFACES
The energy meters are equipped with two pulse outputs or one bus output depending on model and variant.
5.10.3 TARIFF INPUTS
All instruments are equipped with 4 hardware-controlled tariff inputs. The tariffs are controlled via these tariff inputs by ap-
plying certain voltage levels:
 Level 0 = < 12 VAC
 Level 1 = 45 … 265 VAC
Depending on the combination of levels 0 and 1, the values measured at the instrument are recorded in the corresponding
tariff. Recording is thus possible in a daytime and a nighttime tariff, for example.
Instruments with bus (features W1, W2, W4, W7) have 4 additional software-controlled tariffs (not included in the scope of
MID approval). Further information can be found in the respective interface description. See "Bus Connections (features W1,
W2,W4, W7)" 49.
The active tariff appears at the display 30.
5.10.4 PULSE OUTPUTS
Pulses are transmitted via the pulse outputs (pulses per kWh). One of 4 pulse sources can be selected for each output: active
energy import, active energy export, reactive energy import or reactive energy export. Pulse frequency and duration can also
be adjusted on some models and variants.
Voltage
Reference voltage UnAC: U3: 100 … 110 V L–L
U5 230 V L–N
U6: 400 V L–L
U7: 500 V L–L
Allowable deviation: -20% … +15%
Current
Iref Direct connection:
Transformer connec-
tion:
5A
1A
Starting current Direct connection:
Transformer connec-
tion:
20 mA
2mA
Imin Direct connection:
Transformer connec-
tion:
0.1 A
0.01 A
Imax Direct connection:
Transformer connec-
tion:
80 A
6A
Frequency range Nominal frequency: 50 Hz
Cutoff frequency: 45 Hz … 65 Hz
Accuracy Active energy: Class B per EN 50470-3
Reactive energy: Class 2 per EN 62053-23
Sampling rate Continuous, 32 per period
Note
Circuit diagrams, terminal assignments etc. can be found under "Initial
Startup"21.

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19 | 64 ENERGYMID
Direct connection: Pulse frequency is proportional to measured energy.
Transformer connection: Primary values are transmitted. Pulse frequency is proportional to primary energy and the selected
CT value (current transformer ratio) is taken into consideration.
The pulse outputs are electrically isolated from the measuring circuit by means of an optocoupler.
Electrical Values
Feature Q1
Only the auxiliary display is calibrated. As a result, only the secondary values (menu selection) can be used for billing pur-
poses.
Feature Q9
Pulse rates are specified in relation to the primary side.
5.10.5 BUS INTERFACES
Interface descriptions can be found at
https://www.gmc-instruments.de/en/services/download-center/
Pulse frequency: With direct connection: 1000 pls/kWh (adjustable with V2/V4)
With transformer connection: 1000 pls/kWh (adjustable with V2/V4)
Pulse duration: 30 ms (adjustable up to 3 s with V2, V4)
Interpulse period: > 30 ms
Uext: Max. 40 V (375 V with V3, V4)
Switching current: Max. 27 mA (100 mA with V3, V4)
CT x VT
In combination with V1 / V3,
calibrated In combination with V7 In combination with V2 / V4, not calibrated
Fixed Fixed Programmable
2 … 10 1000 pls/kWh 100 1 … 1000 pls/kWh
11 … 100 100 pls/kWh 10 0.1 … 100 pls/kWh
101 … 1000 10 pls/kWh 1 0.01 … 10 pls/kWh
1001 … 10,000 1000 pulses per MWh 100 1 … 1000 pls/MWh
10,001 … 100,000 100 pulses per MWh 10 0.1 … 100 pls/MWh
100,001 … 1,000,000 10 pulses per MWh 1
Interface Feature Note
LON-Bus W1
M-Bus W2 The standard M-Bus secondary address consists of the last 8 digits
of the serial number.
TCP/IP (BACnet, Modbus TCP, HTTP) W4
Modbus RTU W7

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ENERGYMID 20 | 64
5.10.6 BLOCK DIAGRAM FOR SAFETY SPECIFICATION
* Uniform internal interface
5.11 OBIS FIGURES
Tab. 3: OBIS Figures (object identification system) per EN 62056-61
Measured Quantity OBIS
Figure Measured Quantity OBIS Figure
Active energy – import
Total 1.8.0
Active energy – export
Total: 2.8.0
Tariff 1: 1.8.1 Tariff 1: 2.8.1
Tariff 2: 1.8.2 Tariff 2: 2.8.2
Tariff 3: 1.8.3 Tariff 3: 2.8.3
Tariff 4: 1.8.4 Tariff 4: 2.8.4
Tariff 5: 1.8.5 Tariff 5: 2.8.5
Tariff 6: 1.8.6 Tariff 6: 2.8.6
Tariff 7: 1.8.7 Tariff 7: 2.8.7
Tariff 8: 1.8.8 Tariff 8: 2.8.8
Reactive energy (M2/M3) – import
Total: 3.8.0
Reactive energy (M2/M3) – export
Total: 4.8.0
Tariff 1: 3.8.1 Tariff 1: 4.8.1
Tariff 2: 3.8.2 Tariff 2: 4.8.2
Tariff 3: 3.8.3 Tariff 3: 4.8.3
Tariff 4: 3.8.4 Tariff 4: 4.8.4
Tariff 5: 3.8.5 Tariff 5: 4.8.5
Tariff 6: 3.8.6 Tariff 6: 4.8.6
Tariff 7: 3.8.7 Tariff 7: 4.8.7
Tariff 8: 3.8.8 Tariff 8: 4.8.8