janitza UMG 103 Installation And Putting Into Service

B

A

L1 L2 L3 N

Doc No. 1.036.019.g

Power Analyser

UMG 103

Installation and Putting into Service

Product No. 33.03.071

Janitza electronics GmbH
Vor dem Polstück 1
D-35633 Lahnau
Support tel. [phone]
Fax [phone]
E-mail: [e-mail]
Internet: http://www.janitza.com

www.janitza.com

2

UMG 103

General Information 4

Copyright 4
Protected trademarks 4
Liability disclaimer 4
Comments on the manual 4
Meaning of the symbols used 5

Inspection on receipt 6

Scope of supply 7
Available accessories 7
Notes on Use 8

Product Description 10

Intended use 10
Features 11
Operating concept 12
GridVis programming software 12

Installation 14

Installed position 14
Power supply voltage 15
Voltage measurement 16
Current measurement 18
Ammeter 19
Direct measurement 19
RS485 interface 22
What to do in case of errors 24

Service and maintenance 26

Repair and calibration 26
Front film 26
Firmware update 26
Service 26

Technical specifications 28

Transport and storage 28
Ambient conditions during operation 28
General information 28
RS485 interface 29
Measurement uncertainty 30
Measurement 32
Voltage measurement 32
Current measurement 32

3

UMG 103

Appendix 33

Declaration of conformity 33
Dimensioned drawings 34
UMG103 connection example 35
Measuring-circuit and power supply voltage 35
Current measurement 35

Quick Reference Instructions 36

Device address 36
LED display 36

4

UMG 103

General Information

Copyright

This manual is subject to the statutory copyright protection provisions and may
not be photocopied, reprinted, reproduced as a whole or in parts, by mechanical
or electronic means, nor copied or further published in any other way whatsoever
without the legally binding, written consent of
Janitza electronics GmbH,
Vor dem Polstück 1,
D 35633 Lahnau,
Germany.

Protected trademarks

All trademarks and their resulting rights belong to the respective holders of these
rights.

Liability disclaimer

Janitza electronics GmbH does not accept any responsibility whatsoever for errors
or deficiencies within this manual and does not undertake any obligation to keep
the content of this manual up to date.

Comments on the manual

We welcome your comments. If anything in this manual seems unclear to you,
please let us know by sending an eMail to: [e-mail]

5

UMG 103

m

c

Meaning of the symbols used

The following pictograms are used in this manual:

Dangerous voltage!

Danger or risk of severe injury.
Disconnect the system and
device from the power supply
before starting the work.

PE (protective earth) terminal.

Important!

Please note and follow the
documentation. This symbol
is intended to warn you of pos­sible hazards that can occur
during installation, starting up
and use.

6

UMG 103

m

m

m

The installation and start-up
instructions also describe options
which do not belong to the scope
of supply.

Inspection on receipt

Fault free and safe use of this device requires appropriate transport, proper storage,
erection and assembly as well as careful operation and maintenance. If it can be
assumed that safe operation is no longer possible, the device must be immediately
taken out of service and secured against being accidentally started up.
The device must be unpacked and packed with the usual care, without the use
of force and only using suitable tools. The devices must be visually inspected for
perfect mechanical condition. Please also note and follow the installation instructions
enclosed with the device.
It can be assumed that safe operation is no longer possible if the device, e.g.

• has visible damage,

• no longer works, despite intact mains power supply,

• has been exposed to unfavourable conditions (e.g. storage outside the permissible
climatic limits without adjustment to the ambient climate, condensation, or similar)
for a lengthy period or was exposed to unfavourable effects or loads during
transport (e.g. fall from a large height even if there is no visible external damage,
or similar).

Please check the scope of supply for completeness before you start installing the
device.

All screw-type terminals
belonging to the scope of supply
are plugged into the device.

All supplied options and design
versions are described on the
delivery note.

7

UMG 103

Scope of supply

Product No. Name

18 08 094 RS485, external terminating resistor, 120 Ohm

1)

Refer to delivery note for product number.

2)

Design version.

Available accessories

Number Product No. Name

1 52 18 xxx1) UMG103 XX

2)

1 33 03 071 Installation and start-up instructions.
1 51 00 116 CD with the following content:

- “GridVis” programming software,

- Functional description,

- Supplementary device descriptions.
1 1001818 Plug-in screw-type terminal, 2-pin.
1 1001819 Plug-in screw-type terminal, 4-pin.
1 1001820 Plug-in screw-type terminal, 6-pin.

8

UMG 103

Notes on Use

Please read these operating instructions and all other publications which have to
be used to work with this product (in particular for installation, operation or main­tenance).

Note and follow all safety instructions as well as any warnings. If you do not follow the
instructions, personal injuries and/or damage to the product could be the result.

Any unauthorised change or use of this device which extends beyond the given
mechanical, electrical or other operating limits can cause personal injuries and/or
damage to the product.

Any such unauthorised change is “misuse” and/or “negligence” under the prod­uct's warranty and therefore excludes the warranty for cover of possible resulting
injuries or damage.

This device may be solely operated and maintained by skilled persons.

Skilled persons are people who, on the basis of their relevant training and experi­ence, are capable of identifying risks and avoiding possible hazards which operation
or maintenance of the device can cause.

When using the device, any additional legal and safety regulations required for the
respective use must be observed.

9

UMG 103

mc

m

Important!
If the device is not operated
according to the instruction
manual, protection is no longer
ensured and the device can
cause hazards.

Conductors with soldered in­dividual wires are not suitable
for connection to screw-type
terminals.

Only pluggable screw terminals
with the same number of poles
(pins) and of the same type may
be plugged together.

m

The UMG103 is programmed
and read out via RS485 inter­face only.

10

UMG 103

Product Description

Intended use

The UMG103 is intended to be used for the measurement and calculation of
electrical variables such as voltage, current, power, work, harmonic components,
etc. in building installations, at distribution boards, circuit-breakers and busbar
trunking systems.

The UMG103 is permanently installed in control cabinets or small distribution
boards. It can be installed in any position. The measurement results can be read
out via the RS485 interface.

The UMG103 draws its power supply voltage from the measuring-circuit voltage.
The UMG103 is designed for operation in low-voltage distribution systems, in which
overvoltage category III (300 V) impulse voltages can occur.
The UMG103 can measure L-N voltages of up to 240 V and short-term overvoltages
up to 300 Vrms.

The current measurement inputs of the UMG103 are connected via external ../1A
or ../5A current transformers.

The UMG103 is only conditionally suitable for measurements in medium and
high-voltage distribution systems, as it draws the power supply voltage from the
measuring-circuit voltage and therefore loads the voltage transformer with a non­linear current. Special safety provisions are to be applied to the measurements in
medium and high-voltage distribution systems, which are not dealt with here.

The UMG103 fulfils the test requirements for use in industrial areas.

The UMG103 bridges power failures of max 80 ms with a mains voltage of
230 V AC.

The UMG103 saves all min-, max-, energy values as well as runtime counters in a
non-volatile memory approximately every 5 minutes.

The refresh time of the measured values depends on the set net frequency (at 50Hz:
200ms; at 60Hz: 167ms).

11

UMG 103

Features

- Measurement in TN and TT systems,

- 3 voltage measurement inputs (300V CATIII),

- 3 current measurement inputs,

- RS485 (Modbus RTU),

- Installation on top-hat rails, 4,TE

- Suitable for installation in distribution boards.

- Continuous scanning of the voltage and current measurement inputs,

- E

nergy measurement, measurement uncertainty class 0.5 for ../5A current transformers,

- E

nergy measurement,

measurement uncertainty class 1 for ../1A current transformers,

- Fourier analysis 1st to 25th harmonic component (all uneven harmonics) for U and I,

- THD U, THD I,

- Measurement of the distortion reactive power,

- Measurement of positive, negative and zero phase-sequence system,

- Storage of the minimum, maximum and energy values,

- Scanning frequency 5.4 kHz.

12

UMG 103

B

A

Operating concept

The UMG103 is programmed and read out via the RS485 interface only. The device
address is directly set via 2 coding switches.

GridVis programming software

The UMG103 can be programmed and read out using the GridVis programming
software included in the scope of supply. To this end the UMG103 must be connected
to a PC via the RS485 interface.

GridVis features

- Programming the UMG103

- Storing data in a database

- Graphic display of measured values.

Connection

Current

measurement

Red LED

Green LED

Connection of

the measurement

and power supply

voltage

RS485

interface

Setting the

device address

Fig.: View of the UMG103.

13

UMG 103

UMG

604

UMG

103

UMG

103

RS485

Switch

PC

Ethernet

Ethernet

PC

RS232

RS485

UMG

103

UMG103

230/400V 50/60Hz

PE

L2
L3

N

L1

4M

4M

4M

4M

DC

L1 L3L2 N

AC

Fig. Connection of a UMG103 to a PC
via an interface converter.

Interface

converter

Fig. block diagram, UMG103 in TN
system.

Power supply

voltage

Voltage

measurement

Block diagram of measurement and
power supply voltage

Fig. Connection of several UMG103 to
a PC via a UMG604 (with the ethernet
option).

Earthing

the

system

14

UMG 103

B

A

Installation

Installed position

The UMG103 can be installed in control
cabinets or in small distribution boards
according to DIN 43880. It is mounted
on a 35 mm mounting rail according to
DIN EN 60715. It can be installed in any
position..

Fig. UMG103 on mounting rail according
to DIN EN 60715.

Mounting rail

15

UMG 103

m

m

m

Power supply voltage

The power supply voltage required for
operation of the UMG103 is drawn from
the L1-N, L2-N and L3-N measuring­circuit voltages. At least one phase must
lie within the rated voltage range.
The UMG103 requires a voltage of at
least 100 Veff in at least one phase (L-N)
to operate.

The connection leads for the measuring­circuit and power supply voltage must be
routed via a disconnector and protected
with a fuse.

Important!

- A disconnector or circuit­breaker must be provided for
the measuring-circuit and power
supply voltage in the building
installation.

- The disconnector must be
installed near the device and
must be easy for the user to
reach.

- The switch must be labelled
as a disconnecting device for
this device.

Voltages which are above the
allowable voltage range can
destroy the device.

Before applying the measuring­circuit and power supply
voltage, ensure that the voltage
and frequency matches the
information given on the rating
plate!

16

UMG 103

c

B

A

L3

N

L1

L2

Voltage measurement

The UMG103 is designed for operation
in low-voltage distribution systems, in
which overvoltage category III (300 V)
impulse voltages can occur.
The UMG103 can measure L-N voltages of
up to 240 V and short-term overvoltages
up to 300 Vrms.

The UMG103 can be used in three-phase 4
conductor system (TN, TT system) (50 Hz,
60 Hz) with earthed PEN conductor.
The UMG103 draws the power supply
voltage required for operation from the
measuring-circuit voltage.

The instrument leads required for the
voltage measurement must be suitable
for voltages up to 300 VAC to earth and
520 VAC conductor to conductor.
Instrument leads must be fused by an
overcurrent protective device and routed
via disconnectors.

The UMG103 is only conditionally
suitable for measurements in medium
and high-voltage distribution systems,
as it draws the power supply voltage
from the measuring-circuit voltage and
therefore loads the voltage transformer
with a non-linear current.

Fig.16.1 Connection example: Voltage
measurement via disconnectors and
fuses.

Disconnector

Fuse (6A type C)

Important!
The voltage measurement inputs
are hazardous live!

17

UMG 103

m

c

U

L-N

/ U

L-L

120V / 208V
127V / 220V
220V / 380V
230V / 400V
240V / 415V

Important!
The UMG103 is not suitable
for the measurement of direct
voltages.

Important!
Voltages above 240 VAC to earth
must be connected via voltage
transformers.

Fig.17.2 Connection example for voltage
measurement via voltage transformer.

Fig.17.1 Connection example for direct
voltage measurement.

Fig.17.3 Table of the suitable rated
voltages.

Max. rated voltage

Voltage

Voltage

18

UMG 103

m

c

S

2

S

1

L3

L1

L2

S

2

S

1

S

2

S

1

c

B

A

Current measurement

The UMG103 is designed for the con­nection of current transformers with
secondary currents of ../1A and ../5A.
Only alternating currents, not direct
currents, can be measured.
Each current measurement input can
be permanently loaded with 6A or for
1 second with 100 A.
Current transformers, which are not
loaded on the secondary side can con­duct dangerous contact voltages and
therefore must be short-circuited.

The current transformer ratio can be pro­grammed via RS485 using the software
GridVis only.

The current transformer ratio is set to
5/5A in our factory and must be adapted
to the used current tranformers.

Earthing current transformers.
If a connection is provided for
earthing the secondary winding,
this must be connected with
earth.

Fig.18.1 Connection example, current
measurement via current transformer.

Important!
The UMG103 is not suitable
for the measurement of direct
voltages.

Loads

Important!
The current measurement inputs
are hazardous live!

19

UMG 103

Fig.19.1 Example, current measurement
via additional ammeter.

Ammeter

If you not only want to measure the current
with the UMG103 but with an ammeter
also, the ammeter must be connected
in series to the UMG103.

Direct measurement

Nominal currents up to 5 A can also be
measured directly with the UMG103.
In this case it must be noted that each
current measurement input may be loaded
continuously with 6 A or for 1 second
with max 100 A.
As the UMG103 does not have any
integrated protection for the current
measurement, this protection (e.g. 6A
fuse type C) must be provided for during
installation.

Fig. 19.2 Example, direct current meas­urement.

20

UMG 103

Fig.20.1 Example, current measurement
via summation current transformers.

Example
The current is measured via two current
transformers. Both current transformers
have a transformation ratio of 1000/5A.
The summation measurement is performed
with a 5+5/5A summation current
transformer.

Primary current: 1000A + 1000A = 2000A
Secondary current: 5A

The UMG103 must then be set as
follows:
Address 000 = 2000 (primary current)
Address 001 = 0005 (secondary current)

Summation current measurement

If the current is measured via two current
transformers, the total transformation
ratio of the current transformers must
be programmed in the UMG103.

21

UMG 103

c

c

Short-circuit current transformer
connections!

The secondary connections of
the current transformers must be
short-circuited at these first before
the current supply leads to the
UMG103 are disconnected!
If a testing switch is available,
which automatically short
circuits the current transformer's
secondary leads, it is sufficient to
place this in the “test” position,
provided the short-circuiters
have been tested first.

Open current transformer!

High hazardous live voltage peaks
can occur at current transformers
which are operated open on the
secondary side!
The winding insulation in "safe
open current transformers"
is dimensioned so that the
current transformers can be
operated open. But these
current transformers are also
hazardous live if they are
operated open.

22

UMG 103

B

A

B

A

B

A

Bus structure

All devices are connected in a bus
structure (line). Up to 32 stations can be
connected together in a segment. The
cable at the start and end of a segment
is terminated by resistors.
If there are more than 32 stations, repeaters
must be used to connect the individual
segments.

RS485 bus

RS485 interface

The UMG103 has an RS485 interface
and operates with the modbus RTU
protocol.
The device address 1 and baudrate
“automatic detection“ is set in the
presettings.

Modbus address list

The measured values available in the
UMG103 are given in the modbus address
list.
The data in the modbus address list can
be called up in

•

Big-endian (high byte before low
byte) format and in

• Little-endian (low byte before high
byte) format.

The addresses described in this address list
return the data in “big-endian” format.
If you require the data in “little-endian”
format you must add the value 16384
to the address.

23

UMG 103

Shielding

A twisted-conductor and shielded cable
must be provided for connections via the
RS485 interface. The shielding at both
ends of the cable must be connected
to a large area of the housing or cabinet
parts in order to achieve an adequate
shielding effect.

Cable type

Recommended cable types:
Unitronic Li2YCY(TP) 2x2x0.22 (Lapp
cables)
Unitronic BUS L2/FIP 1x2x0.64 (Lapp
cables)

Cable length

1200 m for a baud rate of 38.4 k

Correct

Incorrect

Terminal strip in the control cabinet.

Device with RS485 interface.
(Without terminating resistor)

Device with RS485 interface.
(With terminating resistor at the
device)

Terminating resistors

The cable at the start and end of a
segment is terminated by with resistors
(120 ohm, 1/4 W).

The UMG103 does not contain any
terminating resistors.

For the wiring of the Modbus
connection, CAT cables are not
suitable. Please use the recom­mended cables.

m

24

UMG 103

Possible error

No LED is lit.

Measured current
is too large or too
small.

Measured current is
too small.

Measured voltage
is too small or too
large.

Measured voltage is
too small.

Cause

External fusing for the
power supply voltage has
tripped.
Device is defective.

Current transformer factor
is incorrectly programmed.

Overrange.
The peak current value at
the measurement input has
been exceeded by harmonic
components.

Measurement in the wrong
phase.

Voltage transformer
incorrectly programmed.

Overrange
The peak voltage value at
the measurement input has
been exceeded by harmonic
components.

Remedy

Replace fuse.

Send device to the manufacturer
for repair.

Read out current transformer ratio
and program with the software
GridVis.

Install larger current transformer.
Install larger current transformer.

Important! Ensure the
measurement inputs are not
overloaded.

Check connection and correct
if necessary.

Read out voltage transformer ratio
and program with the software
GridVis.

Install voltage transformers.
Install voltage transformers.

Important! Ensure the
measurement inputs are not
overloaded.

What to do in case of errors

25

UMG 103

Possible error

Active power too
small or too large.

Active power imported
supply / supply is
reversed.

No connection with
the device.

Despite the measures
above the device does
not work.

Cause

The programmed current
transformer transformation
ratio is incorrect.
The current path is assigned
to the wrong voltage path.
The programmed voltage
transformer transformation
ratio is incorrect.

At least one current
transformer connection is
mixed up/reversed.
A current path is assigned to
the wrong voltage path.

RS485:

- Device address is
incorrect.

- Wrong protocol.

Device is defective.

Remedy

Read out current transformer ratio
and program with the software
GridVis.
Check connection and correct
if necessary.

Read out voltage transformer ratio
and program with the software
GridVis.

Check connection using the
software GridVis and correct, if
necessary.
Check connection using the
software GridVis and correct, if
necessary.

Adjust the device address.
Select protocol.

Send device to the manufacturer
for checking with a precise
description of the error.

26

UMG 103

Service and maintenance

The device is subjected to various safety
checks before delivery and marked with
a seal. If a device is opened, the safety
checks must be repeated. A warranty
will be provided for unopened devices
only.

Repair and calibration

Maintenance and calibration work can
only be carried out in the manufacturer's
factory.

Front film

The front film can be cleaned with a soft
cloth and standard household cleaning
agent. Do not use acids and products
containing acid for cleaning.

Disposal

The UMG103 can be reused or recycled
as electronic scrap in accordance with
the legal provisions.

Firmware update

If a firmware update has to be performed
for your UMG103 you can do this with
the GridVis software included in the
scope of supply.

Service

Should questions arise, which are not
described in this manual, please contact
us directly.
We will need the following information
from you to answer any questions:

- Device name (see rating plate),

- Serial name (see rating plate),

- Software release (see measured value
display),

- Measuring-circuit voltage and power
supply voltage,

- Precise description of the error.

27

UMG 103

28

UMG 103

Technical specifications

Ambient conditions during operation

The UMG103 is intended for weather-protected, stationary use. The UMG103
fulfils the use conditions according to DIN IEC 60721-3-3.
Class II according to IEC 60536 (VDE 0106, Part 1), i.e. a PE terminal is not
required!

Transport and storage

The following information applies to devices which are transported or stored in
the original packaging.
Free fall : 1m
Temperature : -20°C to +70°C

General information

Net weight : 150g
Device dimensions :

approx. l=71.5 mm, b=98 mm, h=46mm

Housing flammability class : UL94V-0
Installed position : any
Fixing/mounting : 35 mm top hat rail (according to

IEC/EN 60999-1, DIN EN 50022)

Operating temperature range : -10°C. +55°C
Relative humidity : 5 to 95 %, (at +25 °C) without con-

densation
Degree of pollution : 2
Operating altitude : 0 .. 2000 m above sea level
Installed position : any
Ventilation : Forced ventilation is not required.
Protection against ingress of solid : IP20 according to EN 60529
foreign bodies and water September 2000 IEC 60529:1989

Connectable conductors
Solid core, multi-core, flexible core : 0.08 - 2.5 mm2, AWG 28 - 12
locking torque : 0.5 Nm max
strip lenght min. : 8 mm

29

UMG 103

RS485 interface

Protocol, modbus RTU : Modbus RTU/slave,
Transfer rate : 9.6 kbps, 19.2 kbps, 38.4 kbps,

57.6 kbps, 115.2 kbps,
automatic detection

30

UMG 103

The specifications apply under the following conditions:

- Annual recalibration,

- a warming up time of 10 minutes,

- an ambient temperature of 18 .. 28°C.
If the device is operated outside the range from 18 .. 28°C an additional measurement
error equal to ±0.01% of the measured value must be taken into account per °C
difference.

Measurement uncertainty

The measurement uncertainty of the UMG103 applies to use of the following meas­uring ranges. The measured value must lie within the given limits. Outside these
limits the measurement uncertainty is unspecified.

31

UMG 103

Measured value Measurement uncertainty
IEC 61557-12, DIN EN 61557-12

Voltage L-N 0,2
Voltage L-L 0,2
Current L 0,5
Current N 1,0
Real power 0,5
Apparent power 0,5
Reactive power 0,5
CosPhi 0,2
Leistungsfaktor 2,0
Frequency 0,1
Real energy 0,5
Reactive energy 2,0
Apparent energy 0,5
THD voltage 3,0
THD current 3,0

Real energy
Current transformer ../5A Class 0,5S (DIN EN62053-22:2003)
Class B (DIN EN50470-3:2006)
Current transformer ../1A Class 1 (DIN EN62053-21:2003)
Class A (DIN EN50470-3:2006)
Reactive energy
Current transformer ../5A Class 2 (DIN EN62053-23:2003)
Current transformer ../1A Class 2 (DIN EN62053-23:2003)

32

UMG 103

Measurement
Voltage measurement

Important! The power supply voltage is acquired from the measuring-circuit

voltage.
Power supply voltage range
for supply from single phase : 115 .. 240V (+- 10%), 45-65Hz
for supply from three phases : 80 .. 240V (+- 10%), 45-65Hz
Dreiphasen- 4-Leitersysteme (L-N/L-L) : max. 240V/415V
Power input : max. 4VA
Overvoltage category : 300V CATIII
Resolution : 0,01V
Crest-Faktor : 2 (relating to240Vrms)
Scanning frequency : 5,4kHz
Frequency of the fundamental : 45Hz .. 65Hz
Auflösung : 0,001Hz

Current measurement

Nominal current : 5A
Rated current : 6A
Overload for 1 sec : 60A (sinusoidal)
Resolution : 0,1mA
Crest-Faktor : 2 (relating to 6Arms)
Overvoltage category : 300V CATIII
Power input : approx 0,2 VA (Ri=5mOhm)
Scanning frequency : 5,4kHz

33

UMG 103

The UMG103 fulfils the safety requirements of:

Directive 2004/108/EC in conjunction with DIN EN 61326-1 (2006-10) and

Directive 2006/95/EC in conjunction with EN 61010-1 (2002-08)

Safety requirements

Safety requirements for electrical instrumentation, control and laboratory

equipment

: EN 61010-1 08:2002, IEC 61010-1:2001

Protection class

: II (device without protective conductor)

EMC requirements

Emitted interference, residential area

: DIN EN 61326-1:2006, Class A, IEC 61326-2-1:2005

Interference immunity, industrial area

: DIN EN 61326-1:2006, Table 2, IEC 61326-2-1:2005

Housing

: Electrostatic discharge, IEC 61000-4-2 (4 kV/8 kV)

: Electromagnetic fields, IEC 61000-4-3:2002 (10 V/m)

: Electromagnetic fields, IEC 61000-4-8:2000 (100A/m)

Measuring-circuit and power supply voltage

: Voltage dips, IEC 61000-4-11 (0.5 periods)

: Bursts, IEC 61000-4-4 (2 kV)

: Surge voltages, IEC 61000-4-5 (2 kV)

: Conducted HF signals, IEC 61000-4-6 (3 V)

RS485 : Conducted HF signals, IEC 61000-4-6 (3 V)

: Bursts, IEC 61000-4-4 (1 kV)

: Surge voltages, IEC 61000-4-5 (2 kV)

Declaration of conformity

Appendix

34

UMG 103

B

A

Dimensioned drawings

Front view Side view

35

UMG 103

UMG103 connection example

Measuring-circuit and

power supply voltage

Current measurement

36

UMG 103

0

1

2

4

6

7

5

3

8

9

0

1

2

4

6

7

5

3

8

9

x10 x1

0 0

9 9

H1

H2

Device address

LED display

The device is ready for use but
at least one measuring-circuit
and power supply voltage is
smaller than the operating voltage
range.

All measuring-circuit and power
supply voltages lie within the
operating voltage range. The
device is working. The LED goes
out for 0.5 sec every 5 sec.

A fatal error exists in the
device.
The device must be checked
by the manufacturer.

An overrange exists (i.e.
measuring range is exceeded)
at at least one current or voltage
measuring input.

Data transfer on the RS485 is
active.

For service purposes
only!
If the device is switched on
with address 00 the boot­strap loader is active.
The device is not ready
for use.
The LEDs flash alter­nately.
The current boot loader can
now be overwritten.

Device addresses within
the range from 1 to 99
only can be set for the
UMG103.

red

green

The LEDs flash alternately.
A firmware checksum error exists.
The device is not ready for use.
Perform a firmware update.

The LEDs flash simultaneously.
Data transfer on the RS485 is
active but faulty.

Quick Reference
Instructions