frako PQM 1588 User manual

Power Quality Manager
PQM 1588
Operating Manual
FRAKO Kondensatoren- und Anlagenbau
www.frako.com

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Contents
1 Safety 4
1.1 Objective 4
1.2 Safety instructions 4
1.3 Intended use 5
1.4 Improper use 5
1.5 Repair 6
1.6 Symbols used 6
2 Technical Data 6
3 Instrument description 8
3.1 Function 1 – Gateway 8
3.2 Function 2 - Data collector 8
3.2.1 Recording and alarms 9
3.3 Service functions 9
3.3.1 OPC-UA DA Server 9
3.3.2 RS-485 Bus 1 – Modbus RTU 10
3.3.3 RS-485 Bus 2 – FRAKO Starkstrombus® 10
4 Mounting the instrument 11
4.1 Suitable location 11
4.2 Installing the instrument 11
5 Installation 12
5.1 Elektrical connections 12
5.2 Supply voltage 13
5.3 Relays 14
5.3.1 Alarm 1 Relays 15
5.3.2 Alarm 2 Relays 15
5.3.3 OUT 1 to OUT 5 Relays 15
5.4 RS-485 15
5.4.1 RS-485 BUS 1 - Modbus RTU 16
5.4.2 RS-485 BUS 2 - FRAKO Starkstrombus® 17
5.5 Digital inputs 17
5.6 Analogue outputs 18
5.7 Inputs and outputs not yet in use 19
5.7.1 CAN display – NOT TO BE USED! 19
6 Commissioning (initial start-up) 20
6.1 Safety precautions before start-up 20
6.2 Functional checkout 20
6.3 Initial configuration 20
6.3.1 Initial configuration of Function 1: Gateway 20
6.3.2 Initial configuration of Function 2: Data collector 20
7 Configuration 21
7.1 DIP switches 21
7.2 Network 21
7.2.1 User network settings 21
7.2.2 Fallback network settings 22
7.3 Instrument website 22
7.3.1 Configuration of the network settings 22
7.3.2 Configuration: firmware update 24

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7.3.3 Service functions: OPC-UA 24
7.3.4 Service functions: RS-485 25
7.3.4.1 RS-485 BUS 1 configuration 25
7.3.4.2 RS-485 Bus 2 configuration 26
7.3.5 Service functions: S0 inputs 26
7.3.5.1 Configuration 27
7.3.5.1.1 Saving the configuration on the PC 29
7.3.5.1.2 Loading a saved configuration 29
7.3.5.1.3 Configuration parameters 29
7.3.5.1.3.1 General settings 32
7.3.5.2 Display of measurement readings 33
7.3.5.2.1 Zeroing resettable counters 35
7.3.6 Help: Tools 35
8 Operation 36
9 Maintenance 36
9.1 Cleaning 36
10 Decommissioning and removal, storage and disposal 37
10.1 Decommissioning and removal 37
10.2 Storage 38
10.3 Disposal 38
11 General notes 39
12 Scope of supply 39
Figures and Tables
Figures
Figure 1 Installation 11
Figure 2 PQM connections 12
Figure 3 Bus connections 16
Figure 4 Digital inputs on PQM1588 17
Figure 5 Opening the web page for the S0 inputs 18
Figure 6 Analogue outputs 18
Figure 7 IP configuration web pagen 22
Figure 8 Firmware update 24
Figure 9 Service functions: OPC-UA 24
Figure 10 Service functions: RS-485 25
Figure 11 Digital inputs to the PQM 1588 26
Figure 12 Configuration of the input at the instrument website 27
Figure 13 Instrument web page for configuring the inputs 28
Figure 14 Calculation of the parameters from the multiplier for the counter 30
Figure 15 Temperature transducer 31
Figure 16 Configuration of the temperature transducer shown above 31
Figure 17 Web page for instrument S0 inputs 33
Figure 18 Instrument web page displaying measured values 33
Tables
Tabelle 3-1 Description of gateway interfaces 8
Tabelle 5-1 Suitable cable types 16
Tabelle 7-1 DIP switch functions 21

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1 Safety
1.1 Objective
This operating manual has been prepared for persons who install, connect, commission and
operate the PQM1588 Power Quality Manager.
1.2 Safety instructions
No claims under guarantee shall be valid in the event of damages caused by
failure to observe the instructions in this operating manual. We shall not be held
liable for consequential damages!
Incorrect operation or failure to observe the safety instructions will invalidate all
claims under the guarantee, and no liability is accepted for any injuries to per-
sons or damages to assets arising therefrom or occasioned thereby!
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 co
missioned.
- Only approved installation cables must be used.
- If the instrument does not work after commissioning, it must again be isolated
from the power supply.
- The instrument must only be employed on duties up to the specified maximum
power. Overloading the instrument can result in its destruction, create a fire
hazard or cause an electrical accident. The load ratings for the various
connections must not be exceeded.
- 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 give out heat.
- Do not expose the instrument to rain, water, dampness or high levels of
humidity. Avoid direct contact with water at all cost.

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- Failure to observe the safety instructions can result in death, serious injury or
severe damage to equipment and other assets.
- In commercial premises, the local accident prevention regulations must be
complied with (e.g. in Germany, the regulations of the German Social Accident
Insurance Institutions for electrical installations and equipment).
- The safety of the system in which the PQC is incorporated is the responsibility
of the persons installing and operating the system.
- For safety reasons and to retain conformity with product approval requirements
(CEmarking), the user is not permitted to convert or otherwise modify the
instrument.
- The instrument must always be handled with due care; if it is jolted, knocked or
dropped from even a low height, it will be damaged.
- 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 vol-
tage may present a hazard to health or may even be life-threatening.
The risk to life and limb can be significantly reduced by observing the above
safety precautions.
· 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.
· ⚠ Wherever this symbol is shown, the documentation must be referred to.
1.3 Intended use
The PQM1588 Power Quality Manager is intended for the following applications within the scope
of the technical data (see Section 2, Technical data):
· Acquisition and recording of data
· Detection and forwarding of alarms
· Enabling FRAKO Starkstrombus®and Modbus RTU bus system communication via Ethernet
The PQM1588 is intended for installation in stationary, weather-protected control cabinets and
enclosures located indoors. Exposure to dampness is not permitted. The instrument is installed on
a standard 35mm DIN rail (as per EN50022) inside a control cabinet or other enclosure.
1.4 Improper use
Any use of the instrument that deviates from its intended use is considered improper and therefore
not permitted. If the PQM1588 is used in a way not specified in this operating manual, the protec-
tion supported by the instrument may be adversely affected.

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1.5 Repair
Repairs may not be carried out by the customer or user. Should repair work be necessary, the
customer or user must contact the manufacturer:
FRAKO Kondensatoren- und Anlagenbau GmbH, Tscheulinstr. 21A in D-79331 Teningen, Germany
www.frako.com
1.6 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 instruc-
tions.
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 risks 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.
2 Technical Data
Power supply
· Supply voltage 100 V AC - 253 V AC (absolute limits), frequency 45 - 65 Hz or
100 V DC 230 V DC (absolute limits)
· Power draw Maximum 7 W / 18 VA
· Overcurrent protection External, maximum 2 A (slow-blow) specified
Inputs
· Digital Inputs 6 × digital inputs
S0 puls inputs (DIN 43864) for connecting to volt-free contacts
Open-contact voltage: 15 V

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Max. line resistance: 800 Ω
Short-circuit current: 18 mA
Pulse frequency: 0.1 to 20 Hz
Outputs
· Relay contacts 5 × bistable relay contacts
250 V / 2 A AC or 30 V / 2 A DC
· Alarm contacts 1 × bistable alarm contact
Bistabil, 250 V / 2 A AC or 30 V / 2 A DC
1 × NC alarm contact
250 V / 2 A AC or 30 V / 2 A DC
Interfaces
· Ethernet interfaces 10 /100 MBit/s, RJ45
· RS-485 Bus 1 (from HW Ver. 2) Modbus RTU
· RS-485 Bus 2 (from HW Ver. 2) FRAKO Starkstrombus®
Connections Pluggable screw terminals
· Screw terminals Conductor cross section max. 1.5 mm², min. 0.14 mm²,
Relays, alarm contacts and power supply:
Conductor cross section max. 2.5 mm², min. 0.2 mm²,
Insulation rating: 250 V AC, 80° C
Configuration switches
· DIP switches 8 × DIP switches
Annunciators
· LEDs 15 × LEDs
Design data
· Dimensions (W × H × D) 296 mm × 260 mm × 133 mm casing
· Mounting Standard 35 mm DIN rail as per EN 50022
· Weight approx. 0.4 kg without packaging
· Ingress protection Casing IP30
Terminals IP10 as per EN 60529
Pollution degree 2 as per EN 61010-1:2011-07
· Elektrical Design Casing protection class II as per EN 61010
· Casing material Flammability rating UL 94 V-0 according to casing manufacturer
· EMC EN 55022 :2010 + AC: 2011 Class B / EN 61000-3-2 :2014 /
EN 61000-3-3 :2013 / EN 61000-6-3 :2007 + A1:2011
EN 61000-6-2 :2005 / EN 61000-4-2 :2009 / EN 61000-4-3
:2006 + A1 :2008 + A2 :2010 / EN 61000-4-4 :2012 /
EN 61000-4-5 :2014 / EN 61000-4-6 :2014 / EN 61000-4-8
:2010 / EN 61000-4-11 :2004
Ambient conditions
· Temperature range 0° C to + 45° C
· Installation altitude Max. geographical altitude 2000 m above sea level

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3 Instrument description
3.1 Function 1 – Gateway
NOTE!
This function is available for software version 2.28.50 or later.
The PQM1588 has two RS-485 interfaces for use via Ethernet.
The table below specifies the protocols and interfaces from the bus to Ethernet:
Bus
protocol
Medium Hardware
interface on
PQM 1588
Ethernet
protocol
(TCP)
TC
port
Application
Modbus
RTU
shielded
2core
cable
RS-485 Bus 1 ModbusRTU
over TCP 8100
Higher-level PQM1588
as data collector, device-
specific Modbus RTU
over TCP software
FRAKO
Starkstrom-
bus®
shielded
2core
cable
RS-485 Bus 2 FRAKO TCP
protocol 8000
Higher-level PQM1588
as data collector, device-
specific FRAKO software
Table 3-1: Description of gateway interfaces
Connection and configuration are described from pages 15 and 22 respectively.
3.2 Function 2 - Data collector
The Power Quality Manager collects and records data from the power quality management sys-
tem. Alarms are also detected, recorded and forwarded.
The data acquisition process requires system points, which can be purchased separately as and
when needed or are supplied with the instrument in the form of a licence key. The system points
upgrading package (Article No. 20-10495) is used to increase the PQM1588 system points to the
required number in steps of 10.
When supplied with no license key, the PQM1588 has no system points but can be used as a bus
gateway as described in section [3.1 Funktion 1 – Gateway] above.
The user can connect the PQM1588 via Ethernet, with links to measuring devices via the following
Interfaces:
· Ethernet > Modbus TCP -> Modbus TCP device
· Ethernet > M-Bus converter > MBus device
· Ethernet > EMG 1500-PN > FRAKO Starkstrombus®
· Ethernet > COM server > FRAKO RS232 adapter > EM device
· Ethernet > COM server > EMP 1100 > FRAKO Starkstrombus®
· Ethernet > COM server > Modbus RTU
· RS-485 Bus 1 > Modbus RTU
· RS-485 Bus 2 > FRAKO Starkstrombus®

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NOTE!
RS-485 is available for software version 2.28.50 or later.
The products FRAKO RS232 adapter, COM-Server, EMP 1100 or EMG 1500-PN can be obtained
from FRAKO as accessories. A PQM1588 can use several connection paths simultaneously.
3.2.1 Recording and alarms
The Power Quality Manager maintains contact with the devices in the power quality management
system via the connection paths that have been configured. It polls them continually and stores
the collected data.
For some of these data, their average values, peak values and differential meter readings are com-
puted and saved at set intervals.
Many devices in the power quality management system have an integrated alarm system. Their
alarm data can be read by the PQM1588, which can also monitor any desired measurement rea-
dings to detect if they go outside settable limits.
If an alarm occurs, this event can be notified by various means, such as e-mail. It is also possible
to record alarms in report files.
3.3 Service functions
Ongoing development of the PQM1588 has endowed this instrument with a growing number of
service functions and applications. When required, these can be enabled at the instrument website
of the PQM1588 [see section 7.3 Instrument website].
3.3.1 OPC-UA DA Server
The OPC-UA DA Server in the PQM1588 supports the OPC-UA Data Access (DA) protocol.
The instrument is supplied with this server disabled, but it can be enabled at the instrument web-
site [see section 7.3 Instrument website].
All the devices configured in SYSTEM-SW, together with their measurement readings, can be
accessed with OPC-UA DA via the TCP/IP port 4840.
OPC-UA DA Server uses self-generated and self-signed certificates, which are generated when
the Server is first started. The certificate is issued for the IP address of the instrument, therefore
the IP configuration [described in Section 7.2 Network] must be carried out before OPC-UA Server
is enabled. The certificates are deleted as soon as the service function is disabled.
In the customer-specific OPC-UA Client, the URL is given as follows:
opc.tcp://PQM-IP:4840
NOTE!
OPC-UA DA Server is available for software version 1.26.70 or later.

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3.3.2 RS-485 Bus 1 – Modbus RTU
NOTE!
Direct connection to Modbus RTU is possible for software version 2.28.50 or
later.
This connection makes direct communication with Modbus RTU devices possible. Depending on
the configuration, devices on the bus can either be integrated into the data acquisition function
of the PQM1588 (mode: internal) or made accessible to external software (mode: gateway) via
the TCP port 8100. Simultaneous use of both modes (internal and gateway) is not possible with
Modbus RTU.
The basic configuration is described on page 26 in section [7.3.4.1, RS-485 BUS 1 configuration].
If the PQM1588 is to serve as gateway for the Modbus RTU bus, it must not be configured for
the data acquisition function. Configuration is carried out in SYSTEM-SW, part of the FRAKONET
software. Please refer to the online help section of SYSTEM-SW.
3.3.3 RS-485 Bus 2 – FRAKO Starkstrombus®
NOTE!
Direct connection to the FRAKO Starkstrombus®is possible for software version
2.28.50 or later.
The PQM1588 acts as master on the FRAKO Starkstrombus®and can access devices connected
to the bus, which can thus be integrated into the PQM's data acquisition function. At the same
time it is also possible to use the PQM1588 as Ethernet gateway to the FRAKO Starkstrombus®.
The basic configuration is described on page 26 in section [7.3.4.2 RS-485 Bus 2 configuration].

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4 Mounting the instrument
4.1 Suitable location
The PQM1588 is intended for installation in stationary, weather-protected control cabinets and
enclosures located indoors. Exposure to dampness is not permitted. The instrument is installed on
a standard 35 mm DIN rail as follows:
4.2 Installing the instrument
· Use a screwdriver to withdraw all the orange retaining clips from the instrument base until they
click into place (see Figure 1: below).
· Place the instrument over the DIN rail.
· Press the orange retaining clips back into the casing until they are flush with the front edge of
the instrument base.
Figure 1
Mounting
DANGER!
To avoid accidents, the following must be observed:
- The PQM1588 must be installed in accordance with its intended use before
power is switched on.
- All the connectors supplied with the instrument must be plugged in.
If the above precautions are taken, the danger to life and limb can be significantly
reduced.
DANGER!
To prevent the PQM1588 overheating, the following must be observed:
- The PQM1588 must be installed in an adequately ventilated space, and none of
its ventilation slots must be covered.
- No sources of heat must be located in the vicinity.
- The PQM1588 must not be exposed to direct sunlight.
If the above safety precautions are taken, the risk of damaging equipment and
assets or endangering life and limb can be significantly reduced.

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5 Installation
Prerequisite: the instrument has been correctly fitted to the DIN rail as described in [Section 4
Mounting the instrument].
Figure 2
PQM connections
5.1 Elektrical connections
The instrument connections are shown in the above diagram Figure 2: PQM connections
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 terminals are live!
- The power supply and switched power terminals are live and must not be
touched (risk of electric shock)!
- All live components in the vicinity must be covered to prevent inadvertent
contact.
- If the power supply voltage exceeds the level specified in this operating manual
and stated on the instrument, this may cause damage to the PQM1588.
Consequential damage to other parts of the installation is also possible
- A disconnecting device must be installed so that the connections of the
PQM1588 can be isolated from the electrical system and building electrical
installation.
- Only the specified and appropriate voltages and signals may be connected to
the respective terminals and ports provided for them.
- The cross sections of all cables used must be adequate for their 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 PQM1588. It must
be able to isolate all cables operating at the power supply voltage from the
instrument.

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- 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 consequen-
ces.
The risk to life and limb can be significantly reduced by observing the above
safety precautions.
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].
If any incorrect cables, voltages or signals are applied to the terminals, this can
result in damage to the PQM1588 and the electrical installation.
DANGER!
To avoid accidents, the following must be observed:
At the PQM1588 installation site (e.g. control cabinet, enclosure), all wires and
stranded cables must be adequately secured or grouped in harnesses.
If the above safety precautions are taken, the risk of damaging equipment and
assets or endangering life and limb can be significantly reduced.
NOTE!
If flexible stranded cables are used for the connections, insulated ‘short’ ferrules
6mm in length must be crimped onto their ends. When necessary, longer ferrules
must be shortened to a length of 6mm after crimping.
Examples:
Manufacturer Supplier Conductor CSA Ferrule length Order No.
TE Connectivity Farnell 0.5 mm² 6 mm 966 067-1
TE Connectivity Farnell 0.75 mm² 6 mm 966 067-4
TE Connectivity Farnell 1.0 mm² 6 mm 966 067-8
TE Connectivity Farnell 1.5 mm² 8 mm 1-966 067-2
A disconnecting device must be installed so that the PQM1588 connections can be isolated from
the electrical system/building electrical installation.
5.2 Supply voltage
DANGER!
To avoid accidents, the following must be observed:
- The safety instructions in [Section 5.1 Elektrical connections].
- Connection of the instrument power supply as specified in this manual

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When work is carried out on the instrument terminals and connecting cables,
there is a risk of live components being touched inadvertently. The working vol-
tage may present a hazard to health or may even be life-threatening.
If the above instructions are followed, and the precautions specified in [Section
1.2 Safety instructions], are taken, the risk of damaging equipment and assets or
endangering life and limb can be significantly reduced.
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 PQM1588 and must be able to isolate all cables connected to its
power supply terminals. 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 PQM1588.
5.3 Relays
DANGER!
To avoid accidents, the following must be observed:
- The safety instructions in [Section 5.1 Elektrical connections].
- Connection of the output relays as specified in this manual
- The maximum operating voltage across the relay contacts, as specified in
[Section 2 Technical Data].
When work is carried out on the instrument terminals and connecting cables,
there is a risk of live components being touched inadvertently. The working vol-
tage may present a hazard to health or may even be life-threatening.
If the above instructions are followed, and the precautions specified in [Section
1.2 Safety instructions] are taken, the risk of damaging equipment and assets or
endangering life and limb can be significantly reduced.
CAUTION!
To ensure safe and reliable operation, the following must be observed:
- Each of the output relay connections OUT 1 to OUT 5 must not carry currents
of more than 2A AC, as specified in [Section 2 Technical Data].
If this point is observed, the risk of fire and possible damage to the instrument
will be avoided.
DANGER!
To avoid accidents, the following must be observed:
- The safety instructions in [Section 5.1 Elektrical connections].
- Connection of the alarm relays as specified in this manual
- The maximum operating voltage across the relay contacts, as specified in [Sec-
tion 2 Technical Data].
When work is carried out on the instrument terminals and connecting cables,
there is a risk of live components being touched inadvertently. The working vol-
tage may present a hazard to health or may even be life-threatening.

15
If the above instructions are followed, and the precautions specified in [Section
1.2 Safety instructions] are taken, the risk of damaging equipment and assets or
endangering life and limb can be significantly reduced.
The PQM1588 is equipped with seven output relays. Indicating units are connected to these via
current-amplifying electromechanical devices (relays, contactors).
Alarm signals generated internally in the instrument can be assigned to the volt-free contacts of
the alarm relays using the SYSTEM-SW software. These alarm signals can comprise status sig-
nals, status of the optional digital inputs, set alarm limits being exceeded or device faults.
See [Section 2 Technical Data], for the relevant technical data.
See [Section 7 Configuration], for the configuration procedure.
The connections to the terminals „Alarm 1, Alarm 2 and OUT 1 to OUT 5“, must be made as
shown in Figure 2: PQM connections.
5.3.1 Alarm 1 Relays
Alarm relay 1 is a bistable type. This means that after a power outage, the relay contacts remain in
the same state as they were before the outage.
5.3.2 Alarm 2 Relays
Alarm relay 2 is an NO (‘normally open’) type. Unlike alarm relay 1 it is not bistable. During opera-
tion with no interruptions to the power supply, its contacts remain closed. In the event of a fault
they open. This means that an alarm is given even if power is cut off to the PQM1588 or there is a
break in the alarm circuit.
Under the Alarms heading in SYSTEM-SW alarms from various sources can be assigned to alarm
paths. A switching output not yet allocated or an alarm contact can be selected as alarm path, but
it is standard practice for the Alarm 2 contact—unlike the other switching outputs—to be ‘inver-
ted’. In other words, whereas the normal switching outputs and Alarm 1 close their contacts when
an alarm occurs, the contacts of Alarm 2 open.
5.3.3 OUT 1 to OUT 5 Relays
The relays OUT 1 to OUT 5 are of the bistable type. This means that after a power outage, the
relay contacts remain in the same state as they were before the outage.
5.4 RS-485
Two bus connections RS-485 BUS 1 and BUS 2 are available from hardware version 2 of the
PQM1588 onwards. The hardware version is stated on the nameplate; it also constitutes the first
numeral of the software version.
These two connections can be seen to the left and the right of the Ethernet interface as shown
below in [Figure 3: Bus connections].

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Figure 3
Bus connections
Recommended cable types:
Surge impedance 100 - 120 Ω; Ø ≥ 0,3 mm²; shielded twisted pairs
Manufacturer Cable type Artikle No. Cable Ø
Twinax 105 Ω
Lapp Unitronic®Bus CAN 1×2×0.34 2170263 6.8 mm
Helukabel CAN BUS 1×2×0.34 801572 6.5 mm
Leoni L-02YSCY 1x2x0.34/2.0-120 VI L45551-P21-C5 6.8 mm
Table 5-1: Suitable cable types
NOTE!
Mixing of different cable types must always be avoided.
Configuration is carried out either at the instrument website or in SYSTEM-SW
(FRAKONET software).
5.4.1 RS-485 BUS 1 - Modbus RTU
Connections are made to the terminals A, ⊥and Bof the connector marked RS-485 BUS 1.
·Asignifies R×D - / T×D - , the Minus signal line
·B signifies R×D + / T×D +, the Plus signal line
·⊥signifies chassis, signal ground
NOTE!
Polarity must be taken into account; the signal lines must not be swapped over.
The shielding (⊥) of the bus cable must be earthed at some point in the bus
system. If this has not already been done elsewhere, it should be earthed at the
PQM1588.
A 120 Ω terminating resistor must be connected between terminals Aand Bat both the beginning
and the end of the bus.
The maximum length of the bus depends on the set baud rate, but should not exceed 1200 m.
Please refer to the EIA-485 standard for further details.

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5.4.2 RS-485 BUS 2 - FRAKO Starkstrombus®
Connections are made to the terminals A, ⊥and Bof the connector marked RS-485 BUS 2.
The poles of the two-wire bus are connected to terminals Aand B, and its shielding to the ⊥
terminal. The Aterminal is thus commoned with all the other Aconnections on the bus. The same
applies to the Band ⊥terminals.
NOTE!
Polarity must be taken into account; the signal lines must not be swapped over.
The shielding (⊥) of the bus cable must be earthed at some point in the bus
system. If this has not already been done elsewhere, it should be earthed at the
PQM1588.
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 Repea-
ter, available as an accessory.
The total length of the bus should not exceed 1200 m. An EMB 1101 Repeater must be installed to
cover greater distances.
A 120 Ω terminating 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 kΩ resistor must also be connec-
ted between the terminals A and ⊥. The resistors must be rated at 250 mW.
5.5 Digital inputs
The PQM 1588 has 6 digital inputs, which comply with the S0 standard DIN 43864.
Figure 4
Digital inputs on PQM 1588
Technical Data:
S0 interfaces (DIN43864) for connecting volt-free contacts
·Open-contact voltage: 15 V max.
·Max. line resistance: 800 Ω
·Short-circuit current: 18 mA
·Max. pulse frequency: 20 Hz
·Min. pulse duration: 30 ms
·All pulses shorter than the set debounce time of 20 ms are ignored.

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The configuration of the inputs is done at the instrument website.
Figure 5
Opening the web page for the
S0 inputs
See Section 7.3.5
5.6 Analogue outputs
The PQM 1588 has 2 analogue outputs. Their standard output signals can be selected:
· 0-20 mA
· 0-10V
PLEASE NOTE!
No external voltage sources may be connected to the analogue outputs, as they
themselves supply the power required for their output signals.
Figure 6
Analogue outputs
The DIP switches 8 and 7 can be set to select the outputs as current or voltage signals.
Analogue outputs DIP switch OFF ON
1 8 0 - 20 mA 0 -10 V
2 7 0 - 20 mA 0 -10 V
As shown in Figure 6, no external sources of current or voltage are needed for the output signals.
The analogue signals are calibrated via Modbus TCP. Register addresses are obtained from the
Modbus table for the PQM1588, which can be downloaded as a PDF file from the PQM 1588
instrument website at Help / Downloads.

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5.7 Inputs and outputs not yet in use
DANGER!
To avoid accidents, the following must be observed:
- The safety instructions in [Section 5.1 Elektrical connections]
- All the inputs and outputs listed in this section must not be connected up.
If the above instructions are followed, and the precautions specified in [Section
1.2 Safety instructions] are taken, the risk of damaging equipment and assets or
endangering life and limb can be significantly reduced.
CAUTION!
The software associated with all the inputs and outputs listed in this section has
not yet been configured. They cannot therefore be used until future versions of
the PQM1588 have been released.
5.7.1 CAN display – NOT TO BE USED!

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6 Commissioning (initial start-up)
6.1 Safety precautions before start-up
DANGER!
To avoid accidents, the following must be observed:
The PQC must be installed in accordance with its intended use before power is
switched on. All the connectors supplied with the instrument must be plugged in.
Before start-up, it must be ensured, for example by means of a closed door or a
suitable cover, that the instrument terminals can no longer be touched.
If the instrument terminals and connecting cables remain exposed during opera-
tion, 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.
If the above instructions are followed, and the precautions specified in [Section
1.2 Safety instructions] are taken, the risk of damaging equipment and assets or
endangering life and limb can be significantly reduced.
After all installation work has been carried out as described in [Section 5 Installation]and the above
safety precautions have been taken, the power supply may be switched on and the PQM1588
started up.
6.2 Functional checkout
When the power is switched on, it takes several seconds before the PQM1588 starts up. This is
indicated by all the LEDs lighting up, and then after about 3 seconds going out again. After this,
the Run LED starts to flash at intervals similar to a normal heartbeat. Booting up is complete when
all the LEDS light up briefly one after the other.
6.3 Initial configuration
6.3.1 Initial configuration of Function 1: Gateway
The initial configuration of the PQM1588 as bus gateway is carried out at the instrument website.
Details are given on page 25 and 26 in [Section 7.3.4 Service functions: RS-485].
6.3.2 Initial configuration of Function 2: Data collector
The software SYSTEM-SW is used for the initial configuration of the PQM1588, and is installed on
the PC with the FRAKONET software package. Instructions for setting the PQM1588 are given in
the SYSTEM-SW online help section.
The FRAKONET software package is on the DVD supplied with the instrument.
NOTE!
Configuration of the PQM1588 in SYSTEM-SW is comparable with that of the
EMIS®1500 Central Unit. Where the SYSTEM-SW online help section states ‘data
collector’, EMIS or EMIS1500, the information given can in most cases also be
applied to the PQM1588.