frako EM-PQ 2300 User manual

Power Quality Analyzer
EM-PQ 2300
Operating Manual
FRAKO Kondensatoren- und Anlagenbau
www.frako.com
Figure 1: Front view of the EM-PQ 2300 with the optional EM-FD 2500 Display

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Contents
Figures.................................................................................................................................................... 4
1. Safety.............................................................................................................................................. 5
1.1 Objective........................................................................................................................................ 5
1.1 Safety instructions ......................................................................................................................... 5
1.2 Intended use.................................................................................................................................. 5
1.3 Improper use ................................................................................................................................. 6
1.4 Repair............................................................................................................................................ 6
1.5 Symbols used................................................................................................................................ 6
2. Technical data................................................................................................................................ 7
3. Instrument description................................................................................................................ 10
3.1 Connections................................................................................................................................. 10
3.2 LEDs............................................................................................................................................ 10
4. Mounting the instrument ............................................................................................................ 11
4.1 Suitable location .......................................................................................................................... 11
4.2 Installing the instrument............................................................................................................... 11
5. Installation.................................................................................................................................... 12
5.1 Electrical connections.................................................................................................................. 12
5.1.1 Instrument power supply .......................................................................................................... 15
5.1.2 Measurement connections ....................................................................................................... 15
5.1.2.1 Voltage measurement ........................................................................................................... 15
5.1.2.2 Current measurements.......................................................................................................... 16
5.1.3 Ethernet connection.................................................................................................................. 18
5.1.4 Connecting to the FRAKO Starkstrombus®, alternatively Modbus.......................................... 18
5.1.5 Display bus............................................................................................................................... 19
5.1.5.1 Requirements for the bus cabling.......................................................................................... 20
5.1.5.2 Cable types............................................................................................................................ 20
5.1.5.3 Number of devices on the Display bus.................................................................................. 21
5.1.5.4 Terminating resistors............................................................................................................. 21
5.1.6 Digital OUT 1/2......................................................................................................................... 21
5.1.7 Analog OUT 1/2........................................................................................................................ 21
5.1.8 Digital IN 1/2, Trigger IN, tariff switching.................................................................................. 21
5.1.9 Temperature IN ........................................................................................................................ 22
5.1.10 Alarm ...................................................................................................................................... 22
6. Commissioning (initial start-up) ................................................................................................ 23
6.1 Safety precautions before start-up.............................................................................................. 23
6.2 Functional checkout..................................................................................................................... 23
6.3 Configuration switches (DIP switches)........................................................................................ 23
6.3.1 Functions of the DIP switches.................................................................................................. 23
6.3.2 DHCP options........................................................................................................................... 24
6.3.3 Fixed network IP address......................................................................................................... 24
6.3.4 Mode of the RS-485 interface .................................................................................................. 24
6.4 Terminating resistors on the Display bus .................................................................................... 24
6.4.1 Activating the terminating resistor in the EM-FD 2500............................................................. 25
6.4.2 Activating the terminating resistors in other devices................................................................ 25
6.4.3 Address assignment................................................................................................................. 25
6.5 Installation of the FRAKO software Device Manager.................................................................. 25
6.5.1 IT requirements ........................................................................................................................ 25
6.5.2 Installation ................................................................................................................................ 26
6.5.3 Configuration of the EM-PQ 2300............................................................................................ 26
7. Configuration ............................................................................................................................... 26
7.1 Address assignment.................................................................................................................... 26
7.1.1 Ethernet.................................................................................................................................... 26
7.1.1.1 Default values for network setting ......................................................................................... 26
7.1.1.2 Configuration of the network setting...................................................................................... 26
7.1.1.2.1 Setting the IP address on the EM-FD 2500 Display instrument......................................... 26

Figures Operating Manual EM-PQ 2300
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7.1.1.2.2 Obtaining the IP address from the DHCP server ............................................................... 27
7.1.1.2.3 Setting the IP address without an EM-FD 2500 Display.................................................... 27
7.1.2 FRAKO Starkstrombus® .......................................................................................................... 28
7.1.3 Display bus............................................................................................................................... 28
7.1.3.1 Terminating resistors on the Display bus .............................................................................. 28
7.2 Outputs........................................................................................................................................ 28
7.2.1 Digital OUT 1/2......................................................................................................................... 28
7.2.2 Analog OUT 1/2........................................................................................................................ 28
7.2.3 Alarm relay ............................................................................................................................... 28
7.3 Inputs........................................................................................................................................... 28
7.3.1 Digital IN 1/2............................................................................................................................. 28
7.3.2 Temperature............................................................................................................................. 29
8. Operation...................................................................................................................................... 29
8.1 Via the EM-FD 2500 Display instrument ..................................................................................... 29
8.1.1 Geräte / Devices page.............................................................................................................. 29
8.1.2 Start menu page....................................................................................................................... 29
8.1.3 Display, Overview page............................................................................................................ 30
8.1.4 Display, Phase values page..................................................................................................... 30
8.1.5 Display, THD/VI page............................................................................................................... 31
8.1.6 Display, Harmonics page.......................................................................................................... 31
8.1.7 Display, Graphs page............................................................................................................... 31
8.1.8 Display, TN-S measurement page........................................................................................... 32
8.1.9 Display, Energy meter page..................................................................................................... 32
8.1.10 Display, Big display page ....................................................................................................... 32
8.1.11 Display, big display page, Current page................................................................................. 32
8.1.12 Display, big display page, Voltage page ................................................................................ 32
8.1.13 Display, big display page, Total power page.......................................................................... 33
8.1.14 Display, big display page, TN-S measurement page............................................................. 33
8.1.15 Display, Active alarms page................................................................................................... 33
8.1.16 Configuration, Configuration page.......................................................................................... 33
8.1.17 Configuration, Changing the setting parameters / Password entry........................................ 33
8.2 Web interface ........................................................................................................................... 34
8.2.1 Menu .................................................................................................................................... 34
8.2.2 Operation.............................................................................................................................. 34
8.2.3 Password.............................................................................................................................. 34
8.3 SNMP ....................................................................................................................................... 34
9. Maintenance................................................................................................................................. 35
9.1 Cleaning the instrument............................................................................................................... 35
9.2 Battery ......................................................................................................................................... 35
9.3 Fuse............................................................................................................................................. 36
10. Decommissioning and removal, storage and disposal........................................................... 37
10.1 Decommissioning and removal ................................................................................................. 37
10.2 Storage...................................................................................................................................... 37
10.3 Disposal..................................................................................................................................... 38
Any electronic device that is no longer required must be disposed of in an environmentally sound
manner............................................................................................................................................... 38
11. General operating notes ............................................................................................................. 38
12. Troubleshooting .......................................................................................................................... 38
13. Scope of supply........................................................................................................................... 39

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Figures
Figure 1 Front view of the EM-PQ 2300 with the optional EM-FD 2500 Display
page 1
Figure 2 DIN rail bus connector
Manufacturer: Phoenix Contact
Order code: HBUS 161,6-16P-1S BK, Article No. 2278555
page 10
Figure 3 Dimensions
page 11
Figure 4 Retracting the retaining clips
page 12
Figure 5 3-phase connection diagram
page 14
Figure 6 Single-phase connection diagram
page 14
Figure 7 FRAKO Starkstrombus
page 18
Figure 8 EM-FD 2500 Display
page 19
Figure 9 Configuration switches (DIP switches)
page 23
Figure 10 Location of the MAC address (typical example)
page 27

Safety Operating Manual EM-PQ 2300
5
1. Safety
1.1 Objective
This operating manual has been prepared for persons who install, connect, commission and operate the
EM-PQ 2300 Power Quality Analyzer.
1.1 Safety instructions
DANGER!
The following instructions must be observed to prevent danger to life and limb or damage to
equipment and other assets:
Installation and commissioning of the instrument in industrial plant must be carried out in
strict compliance with the standards IEC 61508 and DIN VDE 0801.
Any other laws, standards, regulations and safety rules (IEC, EN, VDE, etc.) relevant to
this product and the protection of persons and assets must be observed. In Germany, it is
essential to comply with the Equipment Safety Act (GSG) and the regulations of the
German Social Accident Insurance Institutions. In other countries, the equivalent local
regulations must be followed.
Installation, commissioning, modifications and retrofitting may only be carried out by
appropriately qualified personnel.
In Germany, it is essential to comply with the regulations of the Social Accident Insurance
Institution covering electrical installations. In other countries, the equivalent local
regulations must be followed.
The instrument contains live components at the AC supply voltage and must therefore not
be opened.
If the instrument is visibly damaged, it must not be installed, connected or commissioned.
If the instrument does not work after commissioning, it must again be isolated from the
power supply.
Do not expose the instrument to direct sunlight or high temperatures, as these could
damage it or shorten its service life.
Do not install the instrument near to sources of heat such as radiators or other devices
that generate or transmit heat.
Do not expose the instrument to rain, water, dampness or high levels of humidity. Avoid
direct contact with water at all cost.
Failure to observe the safety instructions can result in death, serious injury or severe
damage to equipment and other assets.
The safety of the system in which the EM-PQ 2300 is incorporated is the responsibility of
the persons installing and operating the system.
This operating manual may be changed without notification. Please consult our website
www.frako.com for the up-to-date version.
When work is carried out on the instrument terminals and connecting cables, there is a risk of live
components being touched inadvertently. The working voltage may present a hazard to health or
may even be life-threatening.
Observing the above safety precautions can significantly reduce the risk to life and limb.
The user must ensure that all operators are familiarized with this operating manual and follow it at all
times.
This operating manual must be read through carefully and completely before the instrument is installed,
connected, commissioned and operated. All actions taken must be in accordance with this operating
manual.
The operating manual must be held for future reference.
1.2 Intended use
The EM-PQ 2300 Power Quality Analyzer is intended for the following applications within the scope of the
technical data (see page 7):

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Measurement of parameters relevant to network power quality, such as voltage, current, supply voltage
fluctuations and sags, harmonics and frequency fluctuations, for all three phases L1, L2 and L3 and in
part also for the neutral conductor N and the protective earth PE, within the measurement ranges, see
Section 2, Technical data, page 7.
Recording of energy-consuming processes and analysis of peak loads
Network analyses as per EN 50160
Measurement of a temperature by means of a Pt100or PTt1000 probe
Data acquisition via S0 pulse inputs possible
Connection of an alarm contact within the permitted electrical rating, see Section 2, Technical data,
page 7.
Two values of energy can be output in pulse form (S0 outputs)
Two analogue outputs (0/4–20 mA or 0–10 V) can be used for any measurement readings
Connection to the FRAKO Starkstrombus, alternatively to a Modbus network
Connection to an Ethernet network
Operation via a FRAKO EM-FD 2500 Display instrument
1.3 Improper use
Any use of the instrument that deviates from its intended use is considered improper and therefore not permitted.
If the EM-PQ 2300 is used in a way not specified in this operating manual, the protection supported by the
instrument may be adversely affected.
1.4 Repair
Repairs may not be carried out by the customer or user. Should repair work be necessary, the customer or
instrument operator must contact the manufacturer:
FRAKO Kondensatoren und Anlagenbau GmbH, Tscheulinstrasse 21A, D-79331 Teningen, Germany.
1.5 Symbols used
Special instructions in this operating manual are marked by symbols.
The corresponding word that expresses the extent of the danger is also printed above the instructions.
In order to avoid accidents, death or injury and damage to assets, these instructions must be complied with at all
times.
Warning signs
DANGER!
Indicates an immediate danger that if not avoided can result in death or serious injury.
DANGER!
Indicates an immediate danger of electric shock that if not avoided can result in death or serious
injury.
Notes for the correct functioning of the instrument
CAUTION!
These instructions indicate dangers that could result in damage to equipment if the instructions
are not followed.
They can also cover aspects of environmental protection.
NOTE!
These instructions, when followed, serve to ensure the correct functioning and fault-free operation
of the instrument.

Technical data Operating Manual EM-PQ 2300
7
2. Technical data
Instrument power supply
Supply voltage
90–267 V AC, frequency 45–65 Hz, or 100–360 V DC (absolute
limits). Internal slow-blow, surge-proof fuse 2 A, 250 V AC,
clearing I²t approx. 92.7 A²s
Power draw
max. 8 W with EM-FD 2500 Display connected, or
max. 5 W without EM-FD 2500 Display
Overcurrent protection
External, max. 2 A required
Inputs
Voltage path measurement inputs
5 x 80 V AC, max. 690 V AC (phase–phase, absolute limits),
corresponding to 115–600 V AC networks, electrically interconnected
via high resistance, medium voltage measurement via ../100 V
transformer possible, external 2A fuse required
Overcurrent protection
External, max. 2 A specified
Current path measurement inputs
5 ×x/5 A AC or x/1 A AC (transformer secondary current > 6 mA),
electrically isolated from each other, power draw max. 0.5 VA per
transformer connection, continuous overload rating up to 6 A AC,
max. 10 A AC
Digital inputs
4 ×S0 pulse inputs as per DIN 43864:
Digital IN 1/2, Trigger IN, tariff switching
Common earth connection, in addition electrically connected with the
digital outputs, analogue outputs and temperature input
Temperature input
Pt100 or Pt1000 RTD, 4-wire or 2-wire configuration,
automatic detector type identification
Measurement range -50 –200 °C, resolution 1 °C
Earth connection commoned with the digital outputs, digital inputs
and analogue outputs
Active from hardware v1.8 and firmware v1.72
Outputs
Digital outputs
2 × S0 pulse outputs as per DIN 43864, internal resistance 420 ,
max. permitted voltage 27 V DC
Each output should preferably be routed to a device with a digital
input that conforms to the S0 pulse standard.
Common earth connection, in addition electrically connected with the
digital inputs, analogue outputs and temperature input
Analogue outputs
2 × 0/4–20 mA or 0–10 V DC
Each output separately and automatically identifies signal type as
current or voltage from the externally connected loads. Signal range
0–20 mA or 4–20 mA configurable with software
Load resistances with current signal: 0 to 300 
Load resistances with voltage signal: 2 to 100 k
Common earth connection, in addition electrically connected with the
digital outputs, digital inputs and temperature input
Alarm contact
Volt-free NO contact
Electrical durability AC-11 250 V AC, max. 3 A or DC-13 25 V DC,
max. 3 A, mechanical service life = 20 ×106switching cycles,
electrical service life AC-11 at 3 A = 105switching cycles,
AC-11 at 0.5 A = 106switching cycles,
utilization category AC-x / DC-x as per IEC 60947-4-1
Interfaces
Ethernet interface
100 Mbit/s, RJ45
FRAKO Starkstrombus®,
alternatively Modbus,
RS-485, surge impedance 120 , as per EN 50170 (PNet), for
connecting to the FRAKO Energy Management System.

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alternatively text messaging
(SMS) via a modem
Alternatively can be configured for Modbus.
Text messaging via PNet modem coupler available as optional extra
Display bus
CAN bus as per ISO 11898, RS-485, surge impedance 120 , for
connecting the EM-FD 2500 Display instrument of the FRAKO
Energy Management System
Number of devices on CAN bus: max. 7 EM instruments such as the
EM-PQ 2300 or the EM-MC 2200 and one EM-FD 2500 Display or
max. 6 devices and two EM-FD 2500 Displays, however no more
than one EM-FD 2500 Display per EM-PQ 2300 or EM-MC 2200
Connections
Via pluggable screw terminals
Power supply L and N:
Conductor cross section max. 2.5 mm², min. 0.2 mm2
Insulation rating: 250 V AC, 80 °C
Voltage measurement inputs
L1, L2, L3, N, Vx:
Conductor cross section max. 2.5 mm², min. 0.2 mm2
Insulation rating: max. measured voltage ×1.1
(Example: 230 V AC ×1.1 = 253 V AC, thus select 250 V AC), 80 °C
Current measurement inputs
L1, L2, L3, N, Vx,
terminals S1 and S2 in each case:
Conductor cross section max. 2.5 mm², min. 0.2 mm2
Insulation rating: 250 V AC, 80 °C
Alarm:
Conductor cross section max. 2.5 mm², min. 0.2 mm2
Insulation rating: 250 V AC, 80 °C
Digital OUT 1, 2,-:
Conductor cross section max. 1.4 mm², min. 0.14 mm2
Insulation rating: 50 V DC, 80 °C
Digital IN 1, 2,-:
Conductor cross section max. 1.4 mm², min. 0.14 mm2
Insulation rating: 50 V DC, 80 °C
Analog OUT 1, 2,-:
Conductor cross section max. 1.4 mm², min. 0.14 mm2
Insulation rating: 50 V DC, 80 °C
Temperature IN:
Conductor cross section max. 1.4 mm², min. 0.14 mm2
Insulation rating: 50 V DC, 80 °C
FRAKO Starkstrombus A,B,:
Conductor cross section max. 1.4 mm², min. 0.14 mm2
Insulation rating: 50 V DC, 80 °C
Display bus 1, 2, 3, 4:
Conductor cross section max. 1.4 mm², min. 0.14 mm2
Insulation rating: 50 V DC, 80 °C
Ethernet:
RJ45 plug, Cat 5 as per EIA/TIA-568,100 Mbit/s
Insulation rating: 50 V DC, 80 °C
Note:
0.14 mm2AWG 26; 0.2 mm2AWG 25;
1.4 mm² AWG 17; 2.5 mm² AWG 14
Design data
Dimensions
L ×W ×H: 161.6 mm (9 HP) × 89.7 mm × 62.2 mm casing
L ×W ×H: 161.6 mm (9 HP) × 93 mm × 62.2 mm incl. connectors
Mounting
Snaps over DIN TS 35 top hat rail to EN 50022.
Weight
approx. 500 g
Ingress protection
Casing IP30, terminals IP20 as per EN 60529,
pollution degree 2 as per EN 61010-1:2011-07
Electrical design
Casing protection class I as per EN 61140
Working voltage up to max. 690 V AC absolute value at voltage
measurement inputs
TNV-1 circuits, some of which interconnected:
Digital OUT 1, 2 ,-; Digital IN 1 ,2, -; Analog OUT 1 ,2 ,-; FRAKO
Starkstrombus A, B, ; Display bus 1, 2 ,3, 4; Ethernet
Casing design
To DIN 43880. Flammability rating UL 94 V-0 according to casing
manufacturer

Technical data Operating Manual EM-PQ 2300
9
Impact resistance IK06 as per EN 61010-1:2011-07, 8.2.2
Service life
At +25 °C ambient temperature 10 years,
at +40 °C ambient temperature 6 years
EMC
EMC as per EN 61326-1
EN 61000-4-2, electrostatic discharge: air 8 kV and contact 4 kV with
horizontal and vertical coupling plane
EN 61000-4-3, radiated immunity (EMS) 80 MHz –1 GHz, horizontal
and vertical, level 10 V/m = industrial environment radiation, Class A
EN 55022A EMI 30 MHz –1 GHz = office and residential area,
Class B
EN 61000-4-6, immunity to conducted disturbances, level 10 V RMS,
150 kHz –80 MHz
EN 61000-4-4, burst immunity, 1 kV capacitive coupling, 2 kV
injection into power supply cable and voltage measurement inputs
EN 61000-4-5 surge immunity, 2 kV injection into power supply cable
and voltage measurement inputs
Ambient conditions
Temperature range
-20 °C to +60 °C, noncondensing
Installation altitude
Maximum height above sea level 2000 m
Measuring system
Accuracy
Averaging function
Harmonics measurement
Interharmonics
Harmonics
At 25 °C ambient temperature, voltage and current readings 1%,
temperature readings 2 °C
L1, L2, L3, L1–L2, L2–L3, L3–L1, N, PE: over 200 ms
Measured from L1–L3, not from N, PE
Measured down to 5 Hz
Up to the 51st harmonic

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3. Instrument description
The EM-PQ 2300 Power Quality Analyzer is a useful addition to the FRAKO range of products. It offers the
possibility of carrying out long-term network analyses in compliance with EN 50160 or EN 61000-2-4, monitoring
short supply network sags and performing TN-S system measurements. Harmonics up to the 51st are measured.
The user can select from several options for recording data, e.g. for analysis of the power demand profile over
time.
An outstanding feature is the possibility to acquire measurement data from the neutral conductor N, and
even more importantly from the earth conductor PE, in addition to the three phases L1, L2 and L3. Voltage
and current can be measured in all conductors.
Measurement readings, graphs, alarms and waveforms can be viewed on the optional EM-FD 2500 Display
instrument, which can show data from up to seven EM-PQ 2300 or other suitable instruments of the FRAKO
Energy Management System. The devices whose data are to be displayed are selected using the keys on the
EM-FD 2500 to navigate a menu.
The EM-PQ 2300 Power Quality Analyzer has a DIN rail mounted casing with plug-in connectors for simple
installation and connection to suitable individual instruments of the FRAKO Energy Management System.
Installation can be further simplified with the optional DIN rail bus connector,
which can be obtained from the manufacturer, Phoenix Contact,with the order
code HBUS 161,6-16P-1S BK, Article No. 2278555. This enables the bus
connections of the EM-PQ 2300 Power Quality Analyzer or EM-MC 2200
Maximum Optimizer instruments mounted next to each other on the same DIN
rail to be automatically connected to each other. It is therefore no longer
necessary to wire these connections separately from instrument to instrument,
significantly reducing the costs of installation.
The instruments are connected to the:
- FRAKO Starkstrombus
- Display bus, including the Display instrument power supply
Figure 2: DIN rail bus connector
3.1 Connections
The EM-PQ 2300 Power Quality Analyzer has the following connections:
Inputs
5 voltage measurement inputs for L1 / L2 / L3 / N / PE (or free for other uses)
5 current transformer measurement inputs for L1 / L2 / L3 / N / PE (or free for other uses)
4 S0 pulse inputs for tariff switching, triggering synchronized energy metering with power supplier,
acquisition of pulse signals, alarms and statuses
Pt100 or Pt1000 temperature input in 4-wire or 2-wire configuration
Outputs
1 alarm contact
2 digital outputs programmable either as:
- Pulse contact to output 2 energy readings or
- Status contact to output alarm signals
2 analogue outputs to output any 2 desired measurements as 0–20 mA, 4–20 mA or 0–10 V signals
Interfaces
RS-485 bus, FRAKO Starkstrombus® protocol for connection to the FRAKO Energy Management
System
Ethernet (RJ45 port) with the following functions:
- FTP downloading (for measurement protocols)
- FRAKO Starkstrombus® via Ethernet for this instrument (for FRAKO internal
communications).
- Alternatively Modbus TCP
- The internal alarm system can transmit e-mails via Ethernet or access text messaging (SMS) services.
Transmission rate 10 Mbit/s or 100 Mbit/s.
Display bus (CAN bus) for connecting the optional EM-FD 2500 Display instrument
3.2 LEDs
The six LEDs on the EM-PQ 2300 have the following functions:

Mounting the instrument Operating Manual EM-PQ 2300
11
In front of the casing, from left to right
Run (green)
Instrument in operation, flashes at 1-second intervals.
Bus (yellow)
Indicates access to the FRAKO Starkstrombus® or the Modbus.
Alarm (red)
Indicates presence of alarm signals and instrument faults.
Digital Out 1 (blue)
Lights up when digital output 1 transmits a signal
Digital Out 2 (blue)
Lights up when digital output 2 transmits a signal
In the base near the Display connector
Overcurrent (red)
Lights up if the output to the Display instrument is overloaded.
4. Mounting the instrument
4.1 Suitable location
The EM-PQ 2300 is intended for installation in stationary, weather-protected control cabinets and enclosures. We
recommend installation in a metal cabinet or a shielded enclosure to protect against adverse environmental
factors such as corrosion, pollution and stray radiation.
Provided that high quality EMC-compliant connecting cables are used and the instrument is installed in a metal
cabinet or a shielded enclosure, it can be reasonably assumed that the emission limits of EN 55011/22 Class B
(office and residential area) will be complied with.
The EM-PQ 2300 Ethernet connection is at the top of the casing. A free space of at least 50 mm must be allowed
above the EM-PQ 2300 because of the minimum allowable bending radius of the Ethernet cable and the type of
connector used.
4.2 Installing the instrument
The EM-PQ 2300 is intended for fixed installation in control cabinets or
enclosures; see Section 4.1 Suitable location, page 11.
The instrument has a standard casing designed for mounting on a
35 mm DIN top hat rail (TS 35 as per EN 50022). A rail length of
161.6 mm is required, any desired rail orientation being permitted.
The electrical connections between several suitable devices of the
FRAKO Energy Management System can be simplified with DIN rail bus
connectors offered separately by the manufacturer, Phoenix Contact,
under the order code HBUS 161,6-16P-1S BK, Article No. 2278555.
These are fitted in the DIN top hat rail underneath the EM-PQ 2300
before it is snapped over the rail. See Section 3, Instrument description,
page 10.This simplifies the interconnecting wiring of the devices.
Figure 3: Dimensions
CAUTION!
It is not permitted to operate the instrument other than in a dust-tight control cabinet. In dusty
environments, the ventilation slots in the casing can become blocked, resulting in overheating of
the instrument or even a fire.
Only install the instrument in a control cabinet that guarantees a dry, dust-free interior
environment.
DANGER!
The PQC must not be installed in a hazardous zone, as its switching operations generate sparks
that could ignite flammable gases.
Only install the instrument in areas where there is no danger of a gas or dust explosion.
The instrument is mounted by snapping it over a DIN top hat rail (see example in Figure 4).

12
1. Use a screwdriver to retract all the orange
retaining clips from the instrument base until they
click into place.
2. Place the instrument over the DIN top hat rail.
If the optional DIN rail bus connector is used to
connect the FRAKO Starkstrombus and the
Display bus for several devices, ensure that the
pin strip in the base of the casing is correctly
inserted in the socket strip on the DIN rail bus
connector.
3. Press the orange retaining clips back into the
casing until they click audibly into place flush with
the edge of the instrument base.
Figure 4: Retracting the retaining clips
CAUTION!
A DIN rail bus connector may only be connected to the DIN rail bus connectors of other FRAKO
devices.
Connection to other types of DIN rail bus connectors from other manufacturers can damage or
destroy the EM-PQ 2300 and any connected devices not from FRAKO. The risk of fire can also not
be excluded.
It is therefore not permitted to connect with other types of DIN rail bus connectors from other
manufacturers.
5. Installation
Prerequisite: the instrument has been correctly fitted to the DIN rail as described in Section 4, Mounting the
instrument, page 11.
If the cabling is not EMC-compliant, it is possible that Class A emission limits (industrial environment radiation)
may be exceeded. However, when high quality EMC-compliant connecting cables are used and the instrument is
installed in a metal cabinet or a shielded enclosure, it can be reasonably assumed that the emission limits of
EN 55011/22 Class B (office and residential area) will be complied with.
In cases of interference from the supply network, we recommend installing a broadband filter in the line to the
instrument.
We recommend keeping cable lengths as short as possible and using shielded cables or possibly absorber
cables.
It can happen that the EMC emission limits are exceeded if the EM-PQ 2300 is used in combination with other
devices.
5.1 Electrical connections
The instrument is connected as shown in Figure 5 and Figure 6, page 14.

Installation Operating Manual EM-PQ 2300
13
DANGER!
The following instructions must be observed to avoid danger to life and limb:
When the instrument is being installed or serviced, the instrument and the electrical
system must be isolated from the power supply.
The isolated electrical system must be locked out to prevent its being inadvertently
switched on again.
It must be verified that none of the instrument connections are live!
The power supply and voltage measurement connections are live and must not be
touched!
The measurement terminals L1, L2, L3, N and PE, plus the instrument power supply
terminals L and N and both alarm contacts must be short-circuited during any work
carried out on the instrument.
All live components in the vicinity must be covered to prevent inadvertent contact.
If the power supply voltage and the voltage measured exceed the values specified in this
operating manual and stated on the EM-PQ 2300, this may cause damage to the
instrument. Consequential damage to other parts of the installation is also possible.
The instrument power supply circuit and the voltage measurement connections must all
be protected externally by 2 A slow-blow 250 V AC fuses.
Only the specified and appropriate voltages and signals may be connected to the
respective terminals and ports provided for them.
The cross-sectional areas of all cables used must be adequate for the purpose.
Suitable measures must be taken to prevent cables operating at the power supply
voltage being inadvertently pulled out and twisted.
A disconnecting device, such as an isolator or circuit breaker, must be fitted in the
building electrical installation in a suitable location, accessible by the user and
appropriately labelled as a disconnecting device for the EM-PQ 2300. It must be able to
isolate all cables operating at the power supply voltage from the instrument.
If flexible stranded cables with their total cross-sectional area assembled from several
fine filaments are used for the connections, ferrules must be crimped onto their ends. It
must be ensured that no individual filament has been left out of the ferrule.
When work is carried out on the connecting cables and the instrument terminals, it is possible that
live components may be touched inadvertently. If this occurs, the voltage present may be injurious
to health or may even have fatal consequences.
Observing the above safety precautions can significantly reduce the risk to life and limb.
NOTE!
The instrument can be damaged by incorrect operation.
Only the specified and appropriate voltages and signals may be connected to the
respective terminals and ports provided for them.
The cross-sectional areas of all cables used must be adequate for the purpose.
The required cable types are specified in Section 2, Technical data, page 8.
If any incorrect cables, voltages or signals are applied to the terminals, this can result in damage
to the EM-PQ 2300 and the electrical installation.

14
Figure 5: 3-phase connection diagram
Figure 6: Single-phase connection diagram

Installation Operating Manual EM-PQ 2300
15
Installation can be further simplified with the optional DIN rail bus
connector, which can be obtained from the manufacturer, Phoenix
Contact, with the order code HBUS 161,6-16P-1S BK, Article No.
2278555. This enables the bus connections of the EM-PQ 2300 Power
Quality Analyzer or EM-MC 2200 Maximum Optimizer instruments
mounted next to each other on the same DIN rail to be automatically
connected to each other. It is therefore no longer necessary to wire these
connections separately from instrument to instrument, significantly
reducing the costs of installation.
The instruments are connected to the:
- FRAKO Starkstrombus
- Display bus, including the Display instrument power supply
5.1.1 Instrument power supply
DANGER!
To avoid accidents, the following must be observed:
The safety instructions in Section 5, Installation, page 12
When work is carried out on the instrument terminals and connecting cables, there is a risk of live
components being touched inadvertently. The working voltage may present a hazard to health or
may even be life-threatening.
Observing the above safety precautions can significantly reduce the risk to life and limb and
potential damage to equipment.
The instrument power supply is 90–267 V AC, frequency 45–65 Hz, or 100–360 V DC
(absolute limits). It is connected to terminals Land Nas shown in the diagrams
Figure 5 or Figure 6, page 14.
CAUTION!
The cables leading to the instrument must be permanently connected. It is not permitted for these
to have plug-in connections.
- An external disconnecting device, such as an isolator or circuit breaker, must be fitted in the
power supply line to the instrument. This must be located in the vicinity of the EM-PQ 2300 and
must be able to isolate both the L1 and N cables. It must be suitable for this application, comply
with the requirements of IEC 60947-1 and IEC 60947-3, and be appropriately labelled as a
disconnecting device for the EM-PQ 2300. This device must not disconnect the earthing
conductor.
5.1.2 Measurement connections
5.1.2.1 Voltage measurement
The EM-PQ 2300 can measure five AC voltages, whose respective inputs are electrically interconnected via high
resistances. See Section 2, Technical data, page 7 for the measurement ranges.
DC voltages cannot be measured.
The voltage measurement inputs of the EM-PQ 2300 are intended for 110–600 V AC networks.
It is possible to measure medium voltages using an x/100 V transformer.
Note: A 690 V MEASUREMENT RANGE EXTENSION KIT (Article No. 20-30243) is available for the direct
measurement of voltage in 690 V AC networks.
If the 690 V measurement range extension kit is used, a voltage transformer factor of 1.5 must be entered
when the instrument parameters are configured.

16
DANGER!
To avoid accidents, the following must be observed::
The safety instructions in Section 5, Installation, page 12.
When work is carried out on the instrument terminals and connecting cables, there is a risk of live
components being touched inadvertently. The working voltage may present a hazard to health or
may even be life-threatening.
Observing the above safety precautions can significantly reduce the risk to life and limb.
The preferred arrangement is to connect all three phases L1, L2 and L3, plus the neutral conductor N and the
protective earth PE. Instead of the PE conductor, another voltage source can also be connected, provided that its
parameters are within the range specified in Section 2 Technical data, page 7.
This 3-phase connection is to the terminals L1, L2, L3, Nand Lx as
shown in the diagram Figure 5, page 14, where in addition the variables in
the N and PE conductors are also measured.
Figure 6, page 14,shows the alternative single-phase connection.
It is advisable to connect the N conductor as well as the three phases.
This enables the high measurement accuracy of the EM-PQ 2300 to be achieved when measuring phase–neutral
voltages and the parameters derived from these. If no neutral conductor is present, the Nterminal can be left
unconnected. However, in this situation a virtual star point arises in the instrument, which implies that the values
of the phase–neutral voltages are nearer to each other than necessarily the case. The parameters derived from
these values will be similarly misleading.
Leaving N unconnected is only advisable when the phases are symmetrically loaded, since as a rule the phase–
neutral voltages here are near to each other in value.
NOTE!
The voltage measurement inputs not in use must be commoned with the terminal N. This is
necessary, for example, with single-or two-phase connections.
If this is not done, phantom measurement readings may be displayed for the inputs that are not in
use.
NOTE!
When the Lx terminal is connected to the PE conductor to measure the voltage in it, as shown in
Figures 5 and 6, a green/yellow cable must only be used between the connection point in the
installation and the 2 A fuse, never between the fuse and the terminal Lx on the EM-PQ 2300. The
cable between the fuse and the terminal Lx must have a completely different colour!
If this is not ensured, it is possible that the terminal Lx on the EM-PQ 2300 may then be mistaken
for a normal PE connection, and an additional earth conductor could be commoned there as well.
This would be incorrect, since it is not permitted to route PE connections through disconnecting
devices such as fuses.
5.1.2.2 Current measurements
The EM-PQ 2300 is designed for connection to x/1 A and x/5 A current transformers. Only AC currents can be
measured, not DC currents.
DANGER!
To avoid accidents, the following must be observed:
The safety instructions in Section 5, Installation, page 12
The current measurement inputs must be connected as specified.
When work is carried out on the instrument terminals and connecting cables, there is a risk of live
components being touched inadvertently. The working voltage may present a hazard to health or
may even be life-threatening.
Observing the above safety precautions can significantly reduce the risk to life and limb and
potential damage to equipment.

Installation Operating Manual EM-PQ 2300
17
DANGER!
Live current transformer circuits must never be interrupted. There is a danger that arcing may
occur, which could cause burns or electric shock.
The secondary-side connections of the current transformers must be short-circuited at the
transformers before the circuits to the EM-PQ 2300 are interrupted!
Exceptions: If the current transformers in use are equipped with internal open circuit protectors in
good working order in the secondary circuits, or if a test switch that automatically short-circuits the
current transformer secondary side is fitted. In the latter case, it is essential that the correct
functioning of the short-circuiting switch has been verified before it is then left in the ‘Test’position
for any work on the circuit.
Note: Modern current transformers installed in power systems are, as a rule, equipped with an
internal open circuit protector, which acts to protect the secondary circuit upon this being opened.
However, it is absolutely essential that the presence of an open circuit protector in good working
order be verified before a current transformer secondary circuit is opened.
A safe procedure is to short-circuit the secondary side on the current transformer side of the
terminals to be opened.
DANGER!
Live current transformer circuits must never be interrupted. There is a danger that arcing may
occur, which could cause burns or electric shock.
The retaining screws on the sides of the connectors for the current transformer circuits must
always be tightened before the instrument is put into service.
Tightening these retaining screws prevents the connectors from accidentally working loose and
therefore reduces the risk of arcing.
DANGER!
If an earth terminal is provided at the secondary side of the current transformer, this must be
connected to an earthing conductor!
CAUTION!
The following must be observed to ensure safe and reliable operation:
The connection of the current measurement inputs must be via an external, electrically
isolating current transformer.
Overloading of the current transformers incorporated in the instrument must be avoided.
The maximum allowable continuous current is 6 A AC; transient peaks 10 A.
These measures must be taken to ensure that the instrument is not damaged.
The EM-PQ 2300 can measure five AC currents, whose respective inputs are electrically isolated from each
other. See Section 2, Technical data, page 7 for the measurement ranges.
The currents in the phases L1, L2 and L3, plus those in the neutral conductor N and the protective earth
conductor PE, are measured via external current transformers. Instead of the protective earth another conductor
can also be connected, provided that its parameters are within the range specified in Section 2, Technical data,
page 7.
The terminals L1 –S1-S2, L2 –S1-S2,L3 –S1-S2,
N –S1-S2 and Lx –S1-S2 must be connected as shown in the connection
diagram Fig. 5 on page 14. This shows the 3-phase connections with the
additional measurements in the N and PE conductors.
Unassigned current measurement inputs can be left unconnected.

18
NOTE!
In networks with a nominal voltage of 1000 V or more, the regulations call for the current
transformer circuits to be earthed. At lower voltages, this is not required, but is nevertheless
recommended.
All the S2 terminals, for example, can be commoned to earth, but it must be checked beforehand
whether the current transformer circuits are already earthed in the Installation.
In general, it is recommended that all current transformer circuits be earthed.
In networks with a nominal voltage of 1000 V or more, damage may occur to the instrument if the
circuits are not earthed.
5.1.3 Ethernet connection
The EM-PQ 2300 has a shielded RJ45 jack at the top for connecting it to a hub or switch. Its pole
assignment corresponds to an MDI interface, so that a 1:1 cable must be used; Category 5 is
adequate. Possible transmission rates are 10 Mbit/s or 100 Mbit/s, half-duplex or duplex; the
EM-PQ 2300 automatically selects the highest possible setting.
CAUTION!
Incorrect network settings can cause network errors.
5.1.4 Connecting to the FRAKO Starkstrombus®, alternatively Modbus
Figure 7: FRAKO Starkstrombus
Field of application
The FRAKO Starkstrombus can be used for communication between a PC and the EM-PQ 2300, using either an
EMIS 1500 Central Unit (data collector and bus coupler) or an EMG 1500-PN Gateway (Ethernet bus coupler).
This is a practical solution if the FRAKO Starkstrombus is already installed and a direct connection via Ethernet is
not possible, otherwise the direct communication via Ethernet is preferable to that via the FRAKO Starkstrombus.
Connection
The EM-PQ 2300 uses an RS-485 interface at the terminals ‘BUS A, , B’ to connect to the FRAKO
Starkstrombus. See Figure 7 on page 18.
Terminal Ais commoned with all other Aconnections in the bus. Similarly, all Bterminals are commoned, as are
all terminals (no crossover of wires!). The shielding is connected to the terminal.
The bus shielding ( ) must be earthed at one—and only one—point in the bus system. If earthing has not
already been done at some other point, it can be done at the EM-PQ 2300.
A bus topology (i.e. single line) must be used, with all devices wired in series or linked to the bus by drop lines no
longer than 2 m. Star topologies can be constructed using an EMB 1101 Repeater, available as an accessory.
The total length of the bus should not exceed 1000 m. An EMB 1101 Repeater must be installed to cover greater
distances.
The bus must be
earthed at one point
only!
Shielding
Shielding
Instrument at the
beginning or end
of the bus
120Ω
Instrument
between other
devices on the
bus

Installation Operating Manual EM-PQ 2300
19
A 120 Ωterminating resistor must be installed at each end of the bus by connecting it between the terminals A
and B. In bus systems with fewer than 4 devices, a 1 kΩresistor must also be connected between the terminals A
and . The resistors must be rated at 250 mW.
NOTE!
The bus shielding ( ) must be earthed at one point in the bus system. If earthing has not already
been done at some other point, it can be done at the EM-PQ 2300.
However, the bus must only be earthed at one point!
If this is not done, damage can occur to the bus interfaces of all connected devices, and data
transmission can be disrupted.
NOTE!
A 120 Ω terminating resistor must be installed at each end of the bus by connecting it between the
terminals Aand B. In bus systems with fewer than 4 devices, a 1 kΩ resistor must also be
connected between the terminals Aand . The resistors must be rated at 250 mW.
Without terminating resistors, the data transmission can be disrupted. It is also possible that no
functioning data link can be established between the devices.
Recommended cable types:
Surge impedance 100–120 ; Ø 0.5 mm²; shielded twisted pairs;
Types:
IBM Twinax
EIB bus cable
Lapp Unitronic J-2Y (ST) Y
Siemens YCYM 4 ×2 ×0.8 or PYCYM 4 ×2 ×0.8
NOTE!
A mixing of different cable types must always be avoided.
The use of different cable types can disrupt data transmission. It is also possible that no
functioning data link can be established between the devices.
5.1.5 Display bus
The EM-PQ 2300 can be connected by a suitable bus cable to an optional
EM-FD 2500 Display instrument, which enables the EM-PQ 2300 to show
its measurement readings, graphs, alarms and operating structures.
Figure 8: EM-FD 2500 Display
Other suitable FRAKO Energy Management devices can also be
connected to this bus, provided that the technical specifications of the bus
system are complied with in the cable connections.
The bus system used is the CAN bus.
The EM-FD 2500 Display obtains both its instrument power and its data via the four poles of its male connector.
The connector poles of the EM-FD 2500 Display are assigned as follows:
- Poles 1 and 4 (outer): instrument power = first twisted pair
- Poles 2 and 3 (inner): data transfer = second twisted pair
The cable shielding can be connected to pole 4.
If a suitable cable is used, the length of the complete bus system can be up to 40 m.

20
Cables
There are CAN bus cables on the market with their conductors assembled as twisted pairs, for example those
from Lapp Cables, as well as cables with the conductors stranded, such as those offered by Helukabel.
If twisted pairs are used, one pair must be used for poles 1and 4, and the other pair for poles 2and 3.
With stranded conductors, any one of them can be used for any connection.
Suitable CAN bus cables:
Manufacturer
Installation method
Lapp Cables
Helukabel
Fixed installation
up to 30 m in length
UNITRONIC®BUS CAN UL/CSA (CMX)
2 ×2 × 0.22, Article No. 2170 261
CAN BUS 4 × 1 × 0.22
Article No. 81287
Fixed installation
up to 40 m in length
UNITRONIC®BUS CAN UL/CSA (CMX)
2 ×2 ×0.34, Article No. 2170 264
CAN BUS 4 × 1 × 0.34
Article No. 801573
Highly flexible installation
up to 40 m in length
UNITRONIC®BUS CAN UL/CSA (CMX)
2 ×2 ×0.25, Article No. 2170 273
CAN BUS 4 × 1 × 0.50
Article No. 800685
NOTE!
The data transmission rate of the CAN bus is 1 Mbit/s. According to ISO 11989, this means that if
a suitable uninterrupted cable with core cross sections of 0.25 mm2is used, the maximum length
of the bus will be 40 m.
The use of unsuitable cable types can disrupt data transmission. It is also possible that no
functioning data link can be established between the devices.
5.1.5.1 Requirements for the bus cabling
A bus topology (i.e. single line) must be used.
All devices must be wired in series in the bus.
Drop lines and star topologies are not permitted.
The total length of the bus must not exceed 40 m. See Section 5.1.5.2 Cable types, below for the cable
types to be used and their limitations.
At the beginning and end of the bus, the terminating resistors incorporated in the devices must be
activated. With the other devices that are not located at either end of the bus, the internal terminating
resistors must be deactivated.
NOTE!
To ensure fault-free operation, it is important that the twisted pairs in the cable be
correctly connected:
One twisted pair is connected to the outer poles 1 and 4, the other to the inner poles 2
and 3.
With conductors that are all stranded together, any one of them can be used for any
connection.
The maximum bus length of 40 m for suitable cable must not be exceeded.
A maximum of 7 devices plus one EM-FD 2500 Display or 6 devices plus two
EM-FD 2500 Displays may be connected to the same bus segment, however no more
than one EM-FD 2500 Display per EM-PQ 2300 or EM-MC 2200 may be connected.
If these instructions are not complied with, data transmission may be disrupted. It is also possible
that no functioning data link can be established between the devices.
5.1.5.2 Cable types
The following cable types or others with equivalent specifications must be used.
Surge impedance 120 :
For fixed installation up to 30 m
Lapp UNITRONIC (R) BUS CAN UL/CSA (CMX) 2 × 2 ×0.22, Article No. 2170 261
Helukabel CAN BUS 4 × 1 × 0.22, Article No. 81287
For fixed installation up to 40 m
Lapp UNITRONIC (R) BUS CAN UL/CSA (CMX) 2 ×2 ×0.34, Article No. 2170 264
Helukabel CAN BUS 4 × 1 × 0.34, Article No. 801573