Bender EDS440-LAF-4 User manual

EN
Manual
Insulating fault locator
to locate insulation faults
in ungrounded DC, AC and
three-phase power supplies
(IT systems)
EDS44x_D00201_07_M_XXEN/06.2020
EDS440-L/-S
EDS441-L/-S
EDS441-LAB-4
EDS440-LAF-4

Bender GmbH & Co. KG
Postfach 1161 • 35301 Gruenberg • Germany
Londorfer Straße 65 • 35305 Gruenberg • Germany
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Web: www.bender.de
© Bender GmbH & Co. KG
All rights reserved.
Reproduction only with permission
of the publisher.
Subject to change.
Customer service
Service-Hotline: 0700-BenderHelp (Telephone and Fax)
Carl-Benz-Straße 8 • 35305 Grünberg • Germany
Tel.:[phone]
Fax:[phone]
E-Mail:[email protected]
PLEASE READ THIS MANUAL AND ANY ACCOMPANYING DOCUMENTS CAREFULLY
AND KEEP THEM IN A SECURE PLACE FOR FUTURE REFERENCE.

3EDS44x_D00201_07_M_XXEN/06.2020
1. Important information .................................................................... 6
1.1 How to use this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.1 End customer support and advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.2 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.3 Customer service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Training courses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Delivery conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 Warranty and liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.7 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Safety instructions ............................................................................ 8
2.1 General safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Work activities on electrical installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Device-specific safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Requirements for reliable insulation fault location . . . . . . . . . . . . . . . . . . . 9
2.6 Periodic verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3. Function ........................................................................................... 10
3.1 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.1 Areas of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.2 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.3 System variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.4 System properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.5 Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Operating principle of the EDS system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Schematic diagram EDS system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4. Device overview .............................................................................. 14
4.1 External dimensions EDS44x-x and IOM441-S. . . . . . . . . . . . . . . . . . . . . . . 14
4.2 View EDS440-S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 View EDS440-L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.4 Connections and control panel EDS44x-L . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.5 Connections and control panel EDS44x-S . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5. Mounting ..........................................................................................16
5.1 General instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
5.2 Installation clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
5.3 Screw mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
5.4 DIN rail mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
5.5 Connection of the BB bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
5.6 Connection to the voltage supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
5.7 Connection of the X1 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
5.8 Connection of the relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
5.9 BS bus termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
5.10 Connection of the k1-12/l1-12 interface . . . . . . . . . . . . . . . . . . . . . . . . . . .19
5.10.1 Connection of W…, WR…, WS… series measuring current
transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.10.2 Connection of W…AB series measuring current transformers to
EDS441-LAB-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.10.3 Connection of CTAF…SET series measuring current transformers to
EDS440-LAF-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5.11 Wiring diagram to DC system with ISOMETER® iso685-D-P . . . . . . . . .22
5.12 Wiring diagram to AC system with ISOMETER® iso685-D-P . . . . . . . . .23
5.13 Wiring diagram to 3(N)AC system with ISOMETER® iso685-D-P . . . . .24
5.14 Connection example: ISOMETER® iso685-D-P, EDS440-S, IOM441-S and
EDS440-L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6. Display and alarm messages ........................................................26
6.1 Operating and display elements EDS44x-S. . . . . . . . . . . . . . . . . . . . . . . . . .26
6.2 Operating and display elements EDS44x-L . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.3 Standard display in the operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6.3.1 Standard display EDS44x-S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6.3.2 Standard display EDS44x-L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Table of contents

Table of contentsTable of contents
EDS44x_D00201_07_M_XXEN/06.2020
4
6.4 Alarm messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.1 Insulation fault (ALARM IL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.2 Residual current exceeded (ALARM In) . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.3 Connection fault of the current transformers . . . . . . . . . . . . . . . . . . . 28
6.4.4 Device error, BB bus error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.4.5 Device error, failure BS bus master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.4.6 Error message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.4.7 Acoustic alarm message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7. Commissioning ............................................................................... 30
7.1 Before switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.2 Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3 Steps for commissioning ISOMETER® and EDS44x. . . . . . . . . . . . . . . . . . . 31
8. Device communication ................................................................. 32
8.1 BS-Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.1.1 Master-Slave-Prinzip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.1.2 Adressen und Adressbereiche am BS-Bus . . . . . . . . . . . . . . . . . . . . . . 32
8.1.3 RS-485-Spezifikation/Leitungen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.1.4 Leitungsführung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 Modbus RTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9. Operation ......................................................................................... 33
9.1 Reading out and setting the BS address . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.1.1 Reading out a BS address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.1.2 Setting a BS address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.1.3 Extended address range (offset = 80) . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2 Display and change of transmission protocols . . . . . . . . . . . . . . . . . . . . . . 34
9.2.1 Displaying the current transmission protocol . . . . . . . . . . . . . . . . . . . 34
9.2.2 Changing the transmission protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.3 Resetting saved alarm messages (RESET button) . . . . . . . . . . . . . . . . . . . . 35
9.4 Deactivating the buzzer and resetting the fault message . . . . . . . . . . . 35
9.5 Running a test (TEST button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10. Settings ...........................................................................................36
10.1 EDS settings on the ISOMETER® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
10.1.1 Locating current injector settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
10.1.2 Trigger function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
10.1.3 Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
10.2 Settings of inputs and outputs of the EDS44x-L . . . . . . . . . . . . . . . . . . . .37
10.2.1 Digital inputs of the EDS44x-L (I1, I2) . . . . . . . . . . . . . . . . . . . . . . . . . . .37
10.2.2 Digital outputs of the EDS44x-L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
10.3 Factory settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
11. Alarm messages ...........................................................................40
12. Diagrams ........................................................................................41
12.1 Response sensitivity curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
12.1.1 Characteristic curves EDS440 for 3AC systems . . . . . . . . . . . . . . . . . .42
12.1.2 Characteristic curves EDS440 for AC systems . . . . . . . . . . . . . . . . . . .43
12.1.3 Characteristic curves EDS440 for DC systems . . . . . . . . . . . . . . . . . . .44
12.1.4 Characteristic curves EDS441 for AC systems . . . . . . . . . . . . . . . . . . .46
12.1.5 Characteristic curves EDS441 for DC systems . . . . . . . . . . . . . . . . . . .47
12.1.6 Characteristic curves EDS441-LAB for AC systems . . . . . . . . . . . . . .48
12.1.7 Characteristic curves EDS441-LAB for DC systems . . . . . . . . . . . . . .49
12.1.8 Response values EDS440-LAF for DC systems up to
a system leakage capacitance of max. 100 µF: . . . . . . . . . . . . . . . . . . .50
12.1.9 Response values EDS440-LAF for AC systems up to
a system leakage capacitance of max. 100 µF: . . . . . . . . . . . . . . . . . . .50
12.2 Fault curve EDS440 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
12.3 Fault curve EDS441 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Table of contents
EDS44x_D00201_07_M_XXEN/06.2020
5
13. Technical data ............................................................................... 52
13.1 Tabular data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.2 Standards and certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
13.3 Ordering details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
13.3.1 Insulation fault locators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
13.3.2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
13.3.3 Measuring current transformers for EDS440 . . . . . . . . . . . . . . . . . . . 55
Index ....................................................................................................... 57

EDS44x_D00201_07_M_XXDE/06.2020
6
Important information
1. Important information
1.1 How to use this manual
To make it easier for you to understand and revisit certain sections in this manual, we
have used symbols to identify important instructions and information. The meaning of
these symbols is explained below.
This manual is intended for qualified personnel working in electrical
engineering and electronics!
Read the manual before you begin to mount, connect, and commission
the unit. Always keep the manual within easy reach for future reference
following commissioning.
DANGER
This signal word indicates that there is a high risk of danger that will re-
sult in electrocution or serious injury if not avoided.
WARNING
This signal word indicates a medium risk of danger that can lead to
death or serious injury if not avoided.
CAUTION
This signal word indicates a low-level risk that can result in minor or
moderate injury or damage to property if not avoided.
This symbol denotes information intended to assist the user in making
optimum use of the product.
1.2 Technical support
1.2.1 End customer support and advice
Technical support by phone or e-mail for all Bender products
• Questions concerning specific customer applications
• Commissioning
• Troubleshooting
Telephone: [phone] (365 Tage von 07:00 - 20:00 Uhr [MEZ/UTC +1])
Fax: [phone]
0700BenderHelp (Tel. and Fax in Germany only)
E-mail: [email protected]
1.2.2 Repair
Repair, calibration, update and replacement service for Bender products
• Repairing, calibrating, testing and analysing Bender products
• Hardware and software update for Bender devices
• Delivery of replacement devices
• Extended guarantee, in-house repair service, replacement devices at no extra cost
Telephone: [phone]* (technical issues)
[phone]*, -785* (sales)
Fax: [phone]
E-mail: [email protected]
Please send the devices for repair to the following address:
Bender GmbH, Repair-Service,
Londorfer Straße 65,
35305 Grünberg
1.2.3 Customer service
On-site service for all Bender products
• Commissioning, parameter setting, maintenance, troubleshooting
• Analysis of the electrical installation in the building (power quality test, EMC test,
thermography)
• Training courses for customers
Telephone: [phone]*, -762* (technical issues)/
[phone]* (sales)
Fax: [phone]
E-mail: [email protected]
Internet: www.bender.de
* Mo-Thu 07:00 a.m. - 16:00 p.m. , Fr 07:00 a.m. - 13:00 p.m.

Important informationImportant information
EDS44x_D00201_07_M_XXDE/06.2020
7
1.3 Training courses
Bender is happy to provide training regarding the use of test equipment.
The dates of training courses and workshops can be found on the Internet at
www.bender-de.com -> Know-how -> Seminars.
1.4 Delivery conditions
Bender sale and delivery conditions apply.
For software products, the "Softwareklausel zur Überlassung von Standard-Software als
Teil von Lieferungen, Ergänzung und Änderung der Allgemeinen Lieferbedingungen für
Erzeugnisse und Leistungen der Elektroindustrie" (software clause in respect of the li-
censing of standard software as part of deliveries, modifications and changes to general
delivery conditions for products and services in the electrical industry) set out by the ZVEI
(Zentralverband Elektrotechnik- und Elektronikindustrie e.V.) (German Electrical and
Electronic Manufacturers' Association) also applies. Amending the “General Conditions
for the supply of Products and Services of the Electrical and Electronics Industry” (GL)*
Sale and delivery conditions can be obtained from Bender in printed or electronic format.
1.5 Storage
The devices must only be stored in areas where they are protected from dust, damp, and
spray and dripping water, and in which the specified storage temperatures can be
ensured.
1.6 Warranty and liability
Warranty and liability claims in the event of injury to persons or damage to property are
excluded if they can be attributed to one or more of the following causes:
• Improper use of the device.
• Incorrect mounting, commissioning, operation and maintenance of the device.
• Failure to observe the instructions in this operating manual regarding transport,
commissioning, operation and maintenance of the device.
• Unauthorised changes to the device made by parties other than the manufacturer.
• Non-observance of technical data.
• Repairs carried out incorrectly and the use of replacement parts or accessories not
approved by the manufacturer.
• Catastrophes caused by external influences and force majeure.
• Mounting and installation with device combinations not recommended by the man-
ufacturer.
This operating manual, especially the safety instructions, must be observed by all person-
nel working on the device. Furthermore, the rules and regulations that apply for accident
prevention at the place of use must be observed.
1.7 Disposal
Abide by the national regulations and laws governing the disposal of this device. Ask
your supplier if you are not sure how to dispose of the old equipment.
The directive on waste electrical and electronic equipment (WEEE directive) and the di-
rective on the restriction of certain hazardous substances in electrical and electronic
equipment (RoHS directive) apply in the European Community. In Germany, these poli-
cies are implemented through the "Electrical and Electronic Equipment Act" (ElektroG).
According to this, the following applies:
• Electrical and electronic equipment are not part of household waste.
• Batteries and accumulators are not part of household waste and must be disposed
of in accordance with the regulations.
• Old electrical and electronic equipment from users other than private households
which was introduced to the market after 13 August 2005 must be taken back by the
manufacturer and disposed of properly.
For more information on the disposal of Bender devices, refer to our homepage at
www.bender-de.com -> Service & Support.

EDS44x_D00201_07_M_XXDE/06.2020
8
Safety instructions
2. Safety instructions
2.1 General safety instructions
Part of the device documentation in addition to this manual is the enclosed "Safety in-
structions for Bender products".
2.2 Work activities on electrical installations
If the device is used outside the Federal Republic of Germany, the applicable local stand-
ards and regulations must be complied with. The European standard EN 50110 can be
used as a guide.
2.3 Device-specific safety information
Only qualified personnel are permitted to carry out the work necessary
to install, commission and run a device or system.
DANGER
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
• An electric shock
• Damage to the electrical installation
• Destruction of the device
Before installing and connecting the device, make sure that the in-
stallation has been de-energised. Observe the rules for working on elec-
trical installations.
WARNING
Make sure that the basic settings meet the requirements of the IT system.
Children and the public must not have access to and contact with the
EDS44x.
CAUTION
Make sure that the operating voltage is correct!
Prior to insulation and voltage tests, the EDS44x must be disconnected from
the IT system for the duration of the test. In order to check the correct con-
nection of the device, a function test has to be carried out before starting
the system.
The EDS440-x and EDS441-x are built in accordance with state-of-the-art technology and
the recognised safety regulations. However, the use of such devices may introduce risks
to the life and limb of the user or third parties and/or result in damage to the EDS44x or
other property.
Use the EDS44x only:
• As intended
• In perfect working order
Immediately rectify any faults that may endanger safety. Do not make any unauthorised
changes and only purchase spare parts and optional accessories recommended by the
manufacturer of the devices. Failure to observe this requirement can result in fire, electric
shock and injury.
Unauthorised persons must not have access to or contact with the EDS44x.
Reference signs must always be clearly legible. Replace damaged or illegible signs imme-
diately.
2.4 Intended use
EDS44x insulation fault locators are used to locate insulation faults in unearthed DC, AC
and three-phase power supply systems (IT systems). Depending on the locating current
injector, AC and three-phase systems can be monitored within the range from AC 42 to
1000 V; DC systems, within the range from DC 24 to 1500 V. An AC residual current can be
indicated in the range 42 Hz…1 kHz, 100 mA…20 A (EDS440) or 42 Hz…60 Hz,
100mA…2A(EDS441).
Devices of the EDS44x series comply with the product standard IEC 61557-9.
An EDS system (insulation fault location system) consists of an EDS44x insulation fault lo-
cator and a locating current injector. EDS44x insulation fault locators detect locating cur-
rent signals generated by the locating current injector via measuring current
transformers and evaluate them accordingly.
CAUTION
Risk of malfunctions due to excessive locating current on sensitive
system parts!
An excessive locating current flowing between the IT system and earth
may cause controller faults in sensitive system parts, such as PLC or relays.
Ensure that the level of the locating current is compatible with the system
to be monitored.

Safety instructionsSafety instructions
EDS44x_D00201_07_M_XXDE/06.2020
9
12 measuring current transformers can be connected for each EDS44x. Up to 50 EDS44x
can be linked via BS bus (Bender sensor bus, RS-485 interface with BS protocol) and there-
by, up to 600 outgoing circuits can be monitored.
The scanning time for all measuring channels is at least 6 seconds, depending on the pro-
file.
Intended use also implies:
• The observation of all information in the operating manual
• Compliance with test intervals
In order to meet the requirements of applicable standards, customised parameter set-
tings must be made on the equipment in order to adapt it to local equipment and oper-
ating conditions. Please heed the limits of the area of application indicated in the
technical specifications.
Any other use than that described in this manual is regarded as improper.
2.5 Requirements for reliable insulation fault location
The EDS44x has the task of locating the insulation fault downstream of the measuring
current transformer RFd. To do this, it must reliably detect the locating current caused by
the insulation fault. This is only possible under the following conditions:
• One current transformer must be connected to each activated channel.
• The locating current ILis within the specific range. See chapter 14, Technical data
• The upstream capacitances C
Lu
must be at least as high as the downstream capaci-
tances
C
Ld
.
• The system leakage capacitance must not be too high (refer to "Diagrams" on
page 41 )
• The residual current can be within the following range: 100 mA…10 A (EDS440) or
100 mA…1 A (EDS441).
• Along with the amplitude, the frequency of the residual current influences the relia-
ble detection of the locating current. With regard to this, observe the "Fault curve
EDS440" on page 51 and the "Fault curve EDS441" on page 51.
2.6 Periodic verification
The EDS system monitors itself during operation.
We recommend to activate the test function on each connected EDS44x regularly. There
are several ways to start a test:
• Select standard display and then press the "TEST" button on the front panel of the
EDS44x
• Press an external TEST button connected to the EDS44x
• Send a TEST command from an iso685 device via the BS bus.
Observe the applicable national and international standards, which require regular test-
ing of electrical equipment.

EDS44x_D00201_07_M_XXDE/06.2020
10
Function
3. Function
3.1 Features
3.1.1 Areas of application
• Insulation fault location in AC, 3(N)AC and DC IT systems
• Main circuits and control circuits in industrial plants and ships
• Diode-decoupled DC IT systems in power plants
• Systems for medical locations
3.1.2 Standards
The standard for unearthed power supplies (IT systems) DIN VDE 0100-410 (VDE 0100-
410):2007-06 (IEC 60364-4-41:2005, modified) requires that the first insulation fault is to
be eliminated with the shortest practicable delay. EDS systems enable fast localisation of
this insulation fault.
3.1.3 System variants
The insulation fault locators EDS440-x and EDS441-x differ depending on their response
sensitivity. The EDS440-x is suitable for main circuits.
The EDS441-x can be used in control circuits and in circuits in medical locations.
* High response sensitivity with large system leakage capacitances
** In combination with CTAF...SET series measuring current transformers
-L -S -LAB-4 -LAF-4
EDS
440
Channel LED
BS bus
I∆L = 2…10 mA
Main circuits
Digital inputs and
outputs
No channel LED
BB bus
I∆L = 2…10 mA
Main circuits
No internal
voltage supply
Channel LED
BS bus
I∆L = 10 mA **
Main circuits
Digital inputs and
outputs
EDS
441
Channel LED
BS bus
I∆L = 0.2…1 mA
Control circuits
Digital inputs and
outputs
No channel LED
BB bus
I∆L = 0.2…1 mA
Control circuits
No internal
voltage supply
Channel LED
BS bus
I∆L = 0.2…1 mA*
Control circuits
W…AB current
transformers
Digital inputs and
outputs
3.1.4 System properties
• Universal system concept
• Modular design, therefore easily adjustable to the given circumstances
• Measuring current transformers available in various sizes and versions
• CT connection monitoring
• 12 measuring channels for series W…, WR…, WS… measuring current transformers
• Optional extension by 12 relay channels
• Fault memory behaviour selectable
• Up to 50 EDS insulation fault locators in the system, 600 measuring channels
• Response sensitivity: EDS440 2…10 mA, EDS441 0.2…1 mA
• AC residual current measurement with configurable response value
• Two alarm relays with one N/O contact each
• N/O or N/C operation selectable
• External test/reset button
• Central display of faulty outgoing circuits
• Serial interface RS-485, BS bus address range 2…79
•
Connection to higher-level control and visualisation systems possible .
3.1.5 Compatibility
Legend:
BS bus: Full compatibility, communication via BS bus
BB bus: Full compatibility, communication via BB bus
◊= Full compatibility, no communication possible
#= Limited compatibility + communication via BS bus
Limited display of messages on the device.
Limited parameterisation via the device possible.
! = Limited compatibility + communication via BS bus
Display of all messages on the device.
No parameter setting via the device possible.

FunctionFunction
EDS44x_D00201_07_M_XXDE/06.2020
11
3.1.5.1 Combination of insulation fault locators
3.1.5.2 Current transformers and measuring clamps
3.1.5.3 Other Bender devices
Device EDS440-L EDS440-S EDS441-L EDS441-S EDS441-LAB EDS440-LAF
EDS440-L BS bus ◊
EDS440-S ◊ BB bus
EDS441-L BS bus ◊
EDS441-S ◊ BB bus
EDS441-LAB BS bus
EDS441-LAF BS bus
EDS460/490L BS bus ◊
EDS460/490D BS bus ◊
EDS461/491L BS bus ◊
EDS461/491D BS bus ◊
EDS150 BS bus ◊
EDS151 BS bus ◊
EDS195P ◊◊◊◊
Device Type EDS440-L/S EDS441-L/S EDS441-LAB EDS440-LAF
W…/WR…/
WS… Type A ◊
W/WS 8000 Type A ◊ ◊
W…AB Type
AB ◊
CTAF…SET Type A ◊
Device EDS440-L EDS440-S EDS441-L EDS441-S EDS441-LAB EDS440-LAF
COM460 ! ! ! !
COM465 ! ! ! !
IOM441-S!!!! ! !
CP700 ! ! ! !
MK2430 # #
IRDH575 # #
iso685-x-p BS bus BB bus BS bus BB bus BS bus BS bus
isoMED427 ◊
PGH183 ◊ ◊
PGH185 ◊ ◊
PGH186 ◊ ◊
Device EDS440-L EDS440-S EDS441-L EDS441-S EDS441-LAB EDS440-LAF

FunctionFunction
EDS44x_D00201_07_M_XXDE/06.2020
12
3.2 Operating principle of the EDS system
When an insulation monitoring device detects the occurrence of an insulation fault, it
starts the insulation fault location.
In the event of a first insulation fault, an undefined residual current flows in IT systems,
which is primarily defined by the system leakage capacitances and the value of the insu-
lation fault. The basic idea of insulation fault location is therefore generating a defined lo-
cating current ILthat flows through the insulation fault. The locating current is driven by
the system voltage and can be located in the faulty outgoing circuit using the measuring
current transformer.
The locating current is generated by the locating current injector. It is limited in ampli-
tude and time. The amplitude depends on the size of the existing insulation fault and the
system voltage. It is limited depending on the settings.
The locating current flows from the locating current injector via the live lines to the insu-
lation fault position taking the shortest way. From there, it flows through the insulation
fault and the PE back to the locating current injector. This locating current pulse is detect-
ed by the measuring current transformers on the insulation fault path and signalled by
the connected insulation fault locator.
Locating pulse pattern:
The length of the pulse and pause intervals depends on the system conditions (RF, Ce).
x s
y s
x s
y s
For further information, refer to the data sheet "Technical aspects
main catalogue part 1" in the chapter "Technical aspects when using insulation fault lo-
cation systems".
Measured value depending on the system leakage capacitance
The influence of system leakage capacitances may cause false indication
of the locating current.
The locating current of the locating current injector is limited. Due to this
limitation, the resistance of the insulation fault may be lower than the val-
ue signalled by the indicated locating current.
Project planning
During project planning it must be observed that there are no system
parts where the locating current can cause harmful reactions even in un-
favourable cases.
Symmetrical insulation faults
Under certain conditions, symmetrical insulation faults located down-
stream of the measuring current transformer are not detected. Low-fre-
quency residual currents (e.g. caused by converters) may prevent
insulation faults from being detected if their frequency is identical or al-
most identical to the test pulse frequency of the locating current injector.
Influence by other components
The insulation fault location can be disturbed by components, loads or
EMC influences within an IT system. Thus, secure localisation may not be
possible under all circumstances or false tripping may occur.

FunctionFunction
EDS44x_D00201_07_M_XXDE/06.2020
13
3.3 Schematic diagram EDS system
X1
IT-System
O
K
R(an)
4 0 kΩ/10kΩ
O
K
>20
MΩ>20
MΩ
PGH ON
A1/+ A2/- L1/+ L3/-
L2 KE E
I L I n
EDS440
ISOSCAN®
-1
>3s ADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
ll
A1 A2
US
L1
L2
PE
R
F
I
L
I
L
EDS44x
Un
US
iso685-D-P
Load with an
insulation fault
Legend
EDS44x Insulation fault locator
iso685-D-P Insulation monitoring device with an integrated locating current injector
UnVoltage source IT system
UsSupply voltage
W Measuring current transformers
ILLocating current
RFInsulation fault downstream of the measuring current transformer
PE Protective earth conductor or equipotential bonding conductor
BS bus BS bus for device communication

EDS44x_D00201_07_M_XXDE/06.2020
14
Device overview
4. Device overview
4.1 External dimensions EDS44x-x and IOM441-S
ON
48,5 mm
62,5 mm
71,7 mm
93 mm
45 mm
4.2 View EDS440-S
4.3 View EDS440-L
13 14 23 24
1 2 3 4 5 6 7 8 9 10 11 12
l
k
I n I L
ISOSCAN®
EDS440
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
7
1
SLAVE ADDRESS
CHANNELS
12
11109
87
345621
TEST
MUTE
RESET
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM
ON
ON
13 14 23 24
1 2 3 4 5 6 7 8 9 10 11 12
l
k
I n I L
ISOSCAN®
EDS440
X1
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
7
1
SLAVE ADDRESS
CHANNELS
12
11109
87
345621
TEST
MUTE
RESET
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM
ON
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON

Device overviewDevice overview
EDS44x_D00201_07_M_XXDE/06.2020
15
4.4 Connections and control panel EDS44x-L
ISOSCAN®
EDS440
I L I n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
A1/+ A2/-
12 3 4 5 6 7 8 9 10 11 12
L
13 14 23 24
I1 I2 AB
M+ BA
Channel LEDs
ON LED
COM LED
SERVICE LED
ALARM LED
ALARM LED
X1
I/O interface
k1 - 12 | l1 - 12
Connection
TEST button
RESET button
ADDR. button
+10 step
+1 step
-1 step
Termination
RS-485 interface
Connector 23 | 24
Connector 13 | 14
Alarm relay 2
Alarm relay 1
current transformers
A1/+ A2/-
Supply
voltage Us
Connection
4.5 Connections and control panel EDS44x-S
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
12 3 4 5 6 7 8 9 10 11 12
L
13 14 23 24
ISOSCAN®
EDS440
I L I n
l
k
1 2 3 4 5 6 7 8 9 10 11 12
13 14 23 24
ON LED X3 - rear side
BB bus interface
for ISOMETER®
iso 685(W)-x-P

EDS44x_D00201_07_M_XXDE/06.2020
16
Mounting
5. Mounting
5.1 General instructions
The devices are suitable for the following installation methods:
• Distribution panels according to DIN 43871
• Quick DIN rail mounting according to IEC 60715
• Screw mounting using M4 screws
Only qualified personnel are permitted to carry out the work necessary
to install, commission and run a device or system.
DANGER
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
• An electric shock
• Damage to the electrical installation
• Destruction of the device
Before mounting and connecting the device, make sure that the in-
stallation has been de-energised. Observe the rules for working on elec-
trical installations.
Cable lengths
Install the measuring current transformers according to the instructions
in the respective data sheet of the measuring current transformer. When
connecting the measuring current transformers, it is essential that the
maximum cable lengths are observed.
Application in railway vehicles/DIN EN 45545-2:2016
If the horizontal or vertical distance to adjacent components which do
not meet the requirements in table 2 of DIN EN 45545-2 is less than 20 mm
or less than 200 mm respectively, they are to be regarded as grouped.
Refer to DIN EN 45545-2 chapter 4.3 Grouping rules.
5.2 Installation clearances
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
ISOSCAN®
EDS440
I LI n
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
I∆L
I∆n
-1
>3sADDR.
RESET
+1
+10
TEST
CHANNELS / ADDR.
12
11109
87
345621
+10 +20 +40
Addr. Mode
n
∆
I
ALARM
L
∆
I
ALARM
SERVICE
COM/ADDR.
ON
l1 l2 l3 l4 l5 l6 l7 l8 l9 l10 l11 l12
k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 k11 k12
ll
0 mm
0 mm
0 mm0 mm0 mm
20 mm
20 mm

MountingMounting
EDS44x_D00201_07_M_XXDE/06.2020
17
5.3 Screw mounting
1. Fix the two mounting clips provided with the device manually or using a tool as
illustrated below.
2. Drill the mounting holes for the M4 thread according to the dimensioned drilling
template.
3. Fix the EDS44x using two M4 screws.
36 mm
100 mm
107,3 mm
Ø M4
5.4 DIN rail mounting
1. Fix one of the provided mounting clips manually or using a tool as illustrated below.
2. Snap the EDS44x securely on the DIN rail.
3. Push the mounting clip until it clicks into place.
click!

MountingMounting
EDS44x_D00201_07_M_XXDE/06.2020
18
5.5 Connection of the BB bus
The BB bus is an interface that enables Bender devices to communicate with each other.
The BB bus can be used with an ISOMETER® and a maximum of two EDS44x or one
EDS44x-S and one IOM44-S. For this purpose, the BB bus is installed at the rear side of
both devices and afterwards, both devices are mounted next to each other on the DIN
rail. For further information, refer to the quick-start guide enclosed to the BB bus PCBs.
Voltage supply via BB bus
Sensor variants that are additionally connected to the ISOMETER®, e.g.
EDS44x-S, do not require additional supply voltage when the devices are
connected to the BB bus via X3.
Number of devices to be connected
A maximum of two EDS44x-S or one EDS44x-S with one IOM441-S canbe
connected to an ISOMETER®.
Mounting
When the BB bus is mounted, the EDS44x must always be mounted on
the right side of the ISOMETER®.
Error codes
In the case of the EDS44x-L variant, error codes of the BB bus are indicat-
ed by means of a combination of the SERVICE LED and various flashing
channel LEDs. See "Device error, BB bus error" on page 28.
5.6 Connection to the voltage supply
Back-up fuse voltage supply
If the device is supplied via an external power supply unit, the back-up
fuse Fback-up at connection "A1/+ A2/-" must be selected in such a way that
the feeding power supply unit is able to trip the DC-compatible back-up
fuse.
Example: A back-up fuse of 650 mA/T is recommended when using a 24-V
power supply unit (min. 1 A).
1
2
3
4
5
6
7
8
9
1
0
11
12
L
U
s
= AC/DC 24...240 V
A1/+
F
A2/-

MountingMounting
EDS44x_D00201_07_M_XXDE/06.2020
19
5.7 Connection of the X1 interface
5.8 Connection of the relays
I1 Input 1 M+ Dig. current output
I2 Input 2
T
Ground
ARS-485 A (input) ARS-485 A (output)
BRS-485 B (input) BRS-485 B (output)
The EDS44x-L is connected via the X1 plug.
The EDS44x-S does not feature an X1 interface and can only be connected
via the BB bus.
Alarm relay 1 13 N/O contact Alarm relay 2 23 N/O contact
14 24
23 24
24
2
3
2
13 14
4
1
3
1
BA
M+
BA
I2
I1
OFF
OFF
OFF
ON
ON
ON
R
I1 I2 A B
AB
M+
B
B
B
A
A
+
+
M+
M
B
B
B
B
A
A
A
A
I
2
2
I
1
23 24
13 14
OFF
OFF
OFF
ON
ON
ON
R
23 24
13 14
5.9 BS bus termination
Activating a terminating resistor to define the first and the last device in the bus system.
5.10 Connection of the k1-12/l1-12 interface
ON First and last device in a bus OFF All devices between the first
and the last device in the bus
B
B
B
A
A
+
+
M+
M
B
B
B
B
A
A
A
A
I
2
2
I
1
23
24
13
1
4
OFF ON
R
OFF ON
R
12 3 4 5 6 7 8 9 10 11 12
L
l1 l12l11l2 l10l9l 8l7l6l 5l4l3
k1 k12k11k2 k10k9k8k7k6k5k4k3
l1 Measuring current
transformer 1 k1
l2 Measuring current
transformer 2 k2
l3 Measuring current
transformer 3 k3

MountingMounting
EDS44x_D00201_07_M_XXDE/06.2020
20
5.10.1 Connection of W…, WR…, WS… series measuring current
transformers
For insulation fault location, the measuring current transformers of the W… (closed),
WR… (rectangular) and WS… (split-core) series are used.
Connection of W…, WR…, WS… series measuring current trans-
formers
Terminals 1 and 2 as well as terminals 3 and 4 of the measuring current
transformer are bridged internally. The connections k and l must not be
interchanged on the EDS44x.
Live conductors and measuring current transformers
You must ensure that all live conductors are routed through the measur-
ing current transformer. Do not route any existing PE conductors or
shields of shielded cables through the measuring current transformer!
Standard measuring current transformers are not suitable for the EDS44x
system and must not be used. An accurate measurement result can only
be obtained if these notes are observed.
For further information regarding measuring current transformers, refer
to the respective data sheets.
A1 A2
L1
L2
K1
K2
L
L
KKL
k
l
CTAC 2
k
l
CTAC 1
5.10.2 Connection of W…AB series measuring current transformers to
EDS441-LAB-4
Power consumption of measuring current transformers
A maximum of 6 measuring current transformers can be connected to an
AN420 or AN110 power supply unit.
Locating current
The EDS441-LAB-4 operates exclusively with a locating current of
max. 5 mA. Therefore, selecting the current range > 500 mA on
the current transformer is not suitable for measuring locating
currents < 5 mA.
W...AB b
a
CT1
A1 A2
l1
k1
l1k1
+12V GND -12V
A1 A1 A2A2
+12 V -12 VGND
AN420
EDS441-LAB-4
WXS ...
k:
l:
-12 V:
GND:
+12 V:
Yellow
Green
Black
Brown
Red
WXS…colour code: