Bender iso1685 Series User manual

Manual
EN
ISOMETER® iso1685...
Insulation monitoring device for unearthed
AC, AC/DC and DC power supplies (IT systems)
up to AC 1000 V / DC 1500 V
Software version D408 v1.0x
iso1685P_D00003_01_M_XXEN / 12.2016

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
Customer service
Service-Hotline: 0700-BenderHelp (Telephone and Fax)
Carl-Benz-Straße 8 • 35305 Gruenberg • Germany
Tel.:[phone]
Fax:[phone]
E-Mail:[email protected]
© Bender GmbH & Co. KG
All rights reserved.
Reproduction only with permission
of the publisher.
Subject to change.

Table of contents
3iso1685P_D00003_01_M_XXEN / 12.2016
1. Important information .................................................................... 5
1.1 How to use this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.1 First level support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.2 Repair service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.3 Field service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Training courses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Delivery conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Safety instructions ............................................................................ 7
2.1 General safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Work activities on electrical installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Device-specific safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Work activities on electrical installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6 Address setting and termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Function ............................................................................................. 9
3.1 Device features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.1 General product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3.1 Insulation monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.2 Insulation fault location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.3 Assignment of the alarm relays K1, K2, K3 . . . . . . . . . . . . . . . . . . . . . . 10
3.3.4 Deactivate device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.5 Measured value transmission to the control inputs of the
inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.6 History memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Self test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.4.1 Self test after connection to the supply voltage . . . . . . . . . . . . . . . . .11
3.4.2 Automatic self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.4.3 Manual self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4. Display and operating controls ....................................................12
4.1 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.2 Terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4.3 Display and operating controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.3.1 Display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.3.2 Operating controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.3.3 Access to the DIP switch and µSD card via the service cover . . . . .15
5. Installation and connection ..........................................................16
5.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
5.2 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
5.2.1 Connection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
5.2.2 Step-by-step connection of the ISOMETER® . . . . . . . . . . . . . . . . . . . . .17
5.2.3 Connecting the EDS to the ISOMETER® . . . . . . . . . . . . . . . . . . . . . . . . .17
5.3 Connection to an AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
5.4 Connection example of the ISOMETER® with an insulation fault
locator (EDS440-L) to a 3AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
5.5 Connection example of the ISOMETER® with an insulation fault
locator (EDS460) to an AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
6. Commissioning ...............................................................................21
6.1 Commissioning flow chart insulation fault monitoring . . . . . . . . . . . . . .21
6.2 Commissioning flow chart insulation fault location . . . . . . . . . . . . . . . . .21

Table of contentsTable of contents
iso1685P_D00003_01_M_XXEN / 12.2016
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7. Settings ............................................................................................. 22
7.1 Setting the BMS bus adress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2 Alarm for insulation faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.3 Setting the permissible system leakage capacitance
or measurement speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.4 Digital Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.4.1 Digital Input 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.4.2 Digital Input 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.4.3 Mode of the digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.5 Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.5.1 TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
7.5.2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.5.3 Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.6 Insulation fault location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.6.1 Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.6.2 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.6.3 Deactivate device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.7 Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.8 Resetting fault messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8. Device communication via the BMS bus .................................... 26
8.1 RS-485 interface with BMS protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.2 Topology RS-485 network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.3 BMS protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.4 Commissioning of an RS-485 network with BMS protocol . . . . . . . . . . . 28
8.5 Setting the BMS address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.6 Starting the firmware update via the BMS bus . . . . . . . . . . . . . . . . . . . . . . 28
8.7 Alarm and operating messages via the BMS bus . . . . . . . . . . . . . . . . . . . . 28
8.7.1 Alarm messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.7.2 Operating messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.7.3 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9. Diagrams ...........................................................................................30
9.1 The measurable leakage capacitance depends on the insulation
resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
9.1.1 Response time for insulation measurement . . . . . . . . . . . . . . . . . . . . .31
9.2 Example of alarms stored in the history memory . . . . . . . . . . . . . . . . . . . .33
10. Technical data ...............................................................................34
10.1 Data for iso1685P in tabular form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
10.2 Factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
10.3 Standards and certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
10.4 Ordering data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
INDEX .......................................................................................................37

iso1685P_D00003_01_M_XXEN / 12.2016
5
Important information
1. Important information
1.1 How to use this manual
Always keep this manual within easy reach for future reference.
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!
This signal word indicates that there is a high risk of danger that will re-
sult in electrocution or serious injury if not avoided.
This signal word indicates a medium risk of danger that can lead to
death or serious injury if not avoided.
This signal word indicates a low level risk that can result in minor or mo-
derate injury or damage to property if not avoided.
This symbol denotes information intended to assist the user in making
optimum use of the product.
DANGER
WARNING
CAUTION
1.2 Technical support
For commissioning and troubleshooting Bender offers you:
1.2.1 First level support
Technical support by phone or e-mail for all Bender products
• Questions concerning specific customer applications
• Commissioning
• Troubleshooting
Telephone: [phone]*
Fax: [phone]
In Germany only: 0700BenderHelp (Tel. and Fax)
E-mail: [email protected]
1.2.2 Repair service
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 in the event of faulty or incorrectly delivered
Bender devices
• Extended guarantee for Bender devices, which includes an in-house repair service or
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

Important informationImportant information
iso1685P_D00003_01_M_XXEN / 12.2016
6
1.2.3 Field service
On-site service for all Bender products
• Commissioning, parameter setting, maintenance, troubleshooting for Bender
products
• 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.com
*Available from 7.00 a.m. to 8.00 p.m. 365 days a year (CET/UTC+1)
**Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m.
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 licen-
sing of standard software as part of deliveries, modifications and changes to general deli-
very conditions for products and services in the electrical industry) set out by the ZVEI
(Zentralverband Elektrotechnik- und Elektronikindustrie e. V.) (German Electrical and
Electronic Manufacturer's Association) also applies.
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 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 po-
licies 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.

iso1685P_D00003_01_M_XXEN / 12.2016
7
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.
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.
Hazard due to excessively high locating current or excessively high
locating voltage!
An excessively high locating current may damage sensitive loads (e.g. in
control circuits) or trigger unintended switching processes. For this reason
select a lower locating current for these systems. In case of doubt, please
contact our service department.
DANGER
DANGER
Make sure that the basic settings meet the requirements of the IT system.
Children and unauthorised persons must not have access to or contact
with the ISOMETER®.
Make sure that the operating voltage is correct!
Prior to insulation and voltage tests, the ISOMETER® must be disconnected
from the IT system for the duration of the test. In order to check the correct
connection of the device, a functional test has to be carried out before start-
ing the system.
In the event of an alarm message of the ISOMETER®, the insulation fault
should be eliminated as quickly as possible.
If the ISOMETER® is installed inside a control cabinet, the insulation fault
message must be audible and/or visible to attract attention.
When using ISOMETER®s in IT systems, make sure that only one active
ISOMETER® is connected in each interconnected system. If IT systems are
interconnected via coupling switches, make sure that ISOMETER®s not
currently used are disconnected from the IT system and deactivated. IT
systems coupled via diodes or capacitances may also influence the insu-
lation monitoring process so that a central control of the different
ISOMETER®s is required.
Prevent measurement errors!
When a monitored IT system contains galvanically coupled DC circuits, an
insulation fault can only be detected correctly if the rectifier valves (e.g.
rectifier diode, thyristors, IGBTs, frequency inverters, …) carry a minimum
current of > 10 mA.
WARNING
CAUTION

Safety instructionsSafety instructions
iso1685P_D00003_01_M_XXEN / 12.2016
8
2.4 Intended use
The device is used for monitoring the insulation resistance of extensive systems which
are designed as IT systems. The specific measurement technique monitors the insulation
resistance also in extensive installations where extremely high system leakage capacitan-
ces against earth exist due to interference suppression methods. Also, the adaptation to
high system leakage capacitances occurs automatically.
The device generates locating current pulses required for insulation fault location. That
allows the detection of the insulation fault using permanently installed or mobile insula-
tion fault locators.
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.
Unspecified frequency range
When connecting to an IT system with frequency components below the
specified frequency range, the response times and response values may
differ from the indicated technical data. However, depending on the ap-
plication and the selected measurement method, continuous insulation
monitoring is also possible in this frequency range.
There is no influence on the insulation monitoring for IT systems with fre-
quency components above the specified frequency range, e.g. within the
range of typical switching frequencies of frequency inverters (2…20 kHz).
Only qualified personnel are permitted to carry out the work necessary
to install, commission and run a device or system.
2.5 Work activities on electrical installations
• Only skilled persons are permitted to carry out the work necessary to install, com-
mission and run a device or system.
• Follow the relevant provisions which apply to working governing on electrical
installations particularly EN 50110 or the regulations which take its place.
• If the device is being used in a location outside the Federal Republic of Germany, the
applicable local standards and regulations must be complied with. European stand-
ard EN 50110 can be used as a guide.
2.6 Address setting and termination
Correct address setting and termination of the iso1685… series insulation monitoring de-
vice is essential for correct functioning.
Ensure correct address setting and termination of the device!
Risk of electric shock!
Touching uninsulated live conductors can result in death or serious injury.
Therefore avoid any physical contact with active conductors and ensure
compliance with the regulations for working on electrical installations.
Risk of bus errors!
Double assignment of addresses on the respective BMS busses can cause
serious malfunctions.
DANGER
CAUTION

iso1685P_D00003_01_M_XXEN / 12.2016
9
Function
3. Function
3.1 Device features
• Insulation monitoring in extensive unearthed power supply systems up to
AC 1000 V / DC 1500 V
• Measurement of low-resistance insulation faults
• Separately adjustable response values Ran1 (Alarm 1) and Ran2 (Alarm 2)
(both 200 Ω…1 MΩ) for prewarning and alarm
• Automatic adaptation to high system leakage capacitances up to 2000 µF,
selectable range
• Integrated locating current injector up to 50 mA
• Device self test with automatic fault message in the event of a fault
• Alarm relays separately adjustable for insulation fault 1, insulation fault 2 and device
error
• RS-485 interface (BMS bus), e.g. to control insulation fault location
• µSD card with data logger and history memory for alarms
3.2 Product description
3.2.1 General product description
The ISOMETER® is an insulation monitoring device for IT systems in accordance with IEC
61557-8 and IEC 61557-9. The device is applicable in AC/DC systems.
3.3 Function
Insulation monitoring is carried out using an active measuring pulse which is superimpo-
sed onto the IT system to earth via the integrated coupling.
When the insulation resistance between the IT system and earth falls below the set
prewarning response value Ran1 the LED "Alarm 1” lights and the alarm relay K1 swit-
ches. When the values fall below the alarm response value Ran2 , also LED "Alarm 2” lights
and the alarm relay K2 switches.
The locating current injector integrated in the device for insulation fault location is exter-
nally activated via the BMS interface. When starting insulation fault location, the LED
"PGH on" signals the locating current pulse.
The integrated µSD card is used as data logger for storing all relevant events.
The following measured values, statuses and alarms are stored during operation:
• Insulation resistances and leakage capacitances
• System voltages, partial voltages to earth, supply voltages
• Temperatures: current controller of the locating current injector, coupling L1/+,
L2/–
• Insulation fault
• Connection fault
• Device error
Following each device start-up, a new file is generated. If the current file size exceeds 10
MByte during operation, a new file is generated. The file name contains the time and date
of the creation time. Usually, it takes two days until the maximum file size is reached.
Hence, a µSD card with a memory space of 2 GByte can record data for approx. 400 days.
When the card has reached the maximum data volume, always the oldest file will be over-
written. The history memory on the µSD card contains all saved alarms in csv. format.

FunctionFunction
iso1685P_D00003_01_M_XXEN / 12.2016
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3.3.1 Insulation monitoring
For insulation monitoring, a pulsating AC measuring voltage is superimposed on the IT
system. The measuring pulse consists of positive and negative rectangular impulses of
the same amplitude. The period depends on the system leakage capacitances in each
case and the insulation resistance of the system to be monitored.
Abb. 3.1: Pulse sequence of the measuring voltage for insulation fault monitoring
An insulation fault between system and earth closes the measuring circuit. When the in-
sulation resistance between the IT system and earth falls below the set response values
Ran1 and Ran2 (response value Ran1 musst be set higher than Ran2), the associated alarm
relay switches K1 (11, 12, 14).
Detected insulation faults are signalled to other bus devices via the BMS bus. In addition,
the alarm LEDs Alarm 1 and Alarm 2 will light up.
3.3.2 Insulation fault location
For insulation fault location, a suitable locating current is superimposed onto the faulty
IT system with which EDS… insulation fault locators can locate insulation faults. iso1685P
utilises an internal locating current injector with IL ≤ 50 mA DC.
Abb. 3.2: Pulse sequence of the internal locating current injector for insulation fault location
Um
t
2 s 4 s 2 s 4 s
I
L
t
If the EDS function is activated, the ISOMETER® starts with the insulation fault location as
soon as the resistance value falls below the set response values Ran1 and Ran2. The LED
"PGH ON" flashes during insulation fault location.
When permanently installed insulation fault locators (with master capability) are used,
such as EDS460-D or EDS490-D, control and synchronisation of the locating current injec-
tor is carried out by one of the insulation fault locators in BMS master mode. For this pur-
pose, the iso1685P has to communicate with the insulation fault locator via the BMS bus.
3.3.3 Assignment of the alarm relays K1, K2, K3
• K1 switches when the value falls below the prewarning response value Ran1
(insulation resistance).
• K2 switches when the value falls below the alarm response value Ran2 (insulation
resistance).
• K3 switches in the event of a device or connection error.
During the insulation fault location process, the function of insulation re-
sistance measurement is deactivated.

FunctionFunction
iso1685P_D00003_01_M_XXEN / 12.2016
11
3.3.4 Deactivate device
When the device is deactivated, the coupling unit of the device is galvanically isolated
from the system being monitored. The device does not measure the insulation resistance.
The IT system is NOT being monitored! The device uncouples itself from the system to be
monitored through an internal system isolating switch.
For example, this allows team operation of inverters, since in interconnected systems
only one insulation monitoring device is allowed to be connected in each system.
For further information see page 25.
3.3.5 Measured value transmission to the control inputs of the inverter
All recorded measured values, operating messages and alarms are made available via the
BMS bus.
3.3.6 History memory
All warnings, alarms and device errors are stored in the internal history memory with date
and time. The time the event started, the time of acknowledgement and end of the event
are recorded.
The history data is copied from the internal EEPROM to the History.csv file on the µSD card
under the following conditions:
• following device start-up
• during operation once an hour
• when a compatible µSD card has been inserted
For the evaluation of the history memory, the Excel tool "iso1685 History.xlsx" can be
made available. By way of example, history memory entries are shown on page 33.
3.4 Self test
3.4.1 Self test after connection to the supply voltage
Once connected to the supply voltage, all internal measurement functions, the compo-
nents of the process control such as data and parameter memory as well as the connec-
tions to earth are checked. Once the self test is finished, after approx. 5 s the normal
measurement mode begins.
If a device or connection error is detected, the corresponding alarm will be signalled via
the BMS bus as well as via the alarm relay K3 (31-32-34). This relay is continuously opera-
ting in N/C operation, i.e. it de-energises even in case of a complete device failure.
During this self test, when the device is being started, the alarm relays K1 and K2 are not
switched.
3.4.2 Automatic self test
All supply voltages are continuously monitored. The following tests are continuously
carried out in the background:
• Connection E-KE
• Temperature measurement of coupling device and locating current injector
A self test is automatically carried out at 24 hour intervals.
During the automatic self test, the alarm relays are not switched.
3.4.3 Manual self test
The self test is started via the BMS interface by a BMS master with test button.
Only in the manual self test mode, the following tests are carried out:
• internal Flash
• CPU register
• Watchdogs
• Oscillator
• Restart of the device including re-initialising and recalibration
During the automatic self test all alarm relays are switched.

iso1685P_D00003_01_M_XXEN / 12.2016
12
4. Display and operating controls
4.1 Dimensions
SERVICE
ALARM 2
ISOMETER
®
iso1685
ON
ALARM 1
PGH ON
246 mm
125 mm40.5 mm
40.75 mm
51 mm
368 mm
383 mm
401.5 mm
106 mm
64 mm
8.75 mm
5.2 mm
61.8 mm
76.6 mm
39.8 mm
55.7 mm

Display and operating controls
iso1685P_D00003_01_M_XXEN / 12.2016
13
4.2 Terminals
A1 A2E KE
21 22 2431 32 34k l kT ITA B S
RS-485
Term.
off o
CAN 1 CAN 2
I2+ I2- I1+ I1-
K3 K2
11 12 14
K1
I2+ I2- I1+ I1- A B S k I kT IT 31 32 34 21 22 24 11 12 14 E KE A1 A2
I2+
I2-
I1+
I1-
Digital Inputs
no function
RS-485 Term.
off
on
CAN 1
CAN 2
no function
A, B, S
Connection to BMS
bus, RS-485
Protokoll: BMS
S= shield (connect
one end to PE)
k
I
kT
IT
no function
31, 32, 34
Alarm relay K3 for
internal
device error
(LED „Service“)
21, 22, 24
Alarm relay K2 for
insulation faults
11, 12, 14
Alarm relay K1 for
insulation faults
E, KE
Separate connection of E (eath) and
KE (control earth) to PE.
Connect both to PE
A1, A2
Connection to Us DC 24 V
via fuses 6 A each
L2/L- L1/L+
L1/+ L2/-
Connection to L2/-.
Connection to L2/- of the IT system
via 1 A fuses
Connection toL1/+.
Connection to L1/+ of the IT system
via 1 A fuses

Display and operating controls
iso1685P_D00003_01_M_XXEN / 12.2016
14
ISOMETER
®iso1685
PGH ON
LED’s:
- ON: Power on
- PGH ON: Insulation fault location
- SERVICE: device error, connection fault
- ALARM 1: Insulation fault
- ALARM 2: Insulation fault
DIP switch (SS8103)
Button (ST6101)
Memory Card (SDCard)

Display and operating controlsDisplay and operating controls
iso1685P_D00003_01_M_XXEN / 12.2016
15
4.3 Display and operating controls
4.3.1 Display elements
1ON
(green)
Power On indicator
Flashes with a pulse duty factor of approx. 80 % and 1 Hz.
Device error:
Lights continuously, when the device stops functioning (device stopped).
Software update:
Flashes approx. three times faster during firmware update. Update time
< 4 minutes
2PGH ON
(yellow)
Insulation fault location:
Flashes with the cycle of the locating current.
3PGH ON
(yellow)
The LED "PGH ON" flashes during insulation fault location . It indicates that
the locating current for the insulation fault location is generated.
4SERVICE
(yellow)
Internal device and connection error (system, earth): Lights continuously.
Also refer to the list of error codes on page 22.
5ALARM 1
(yellow)
Insulation fault 1 (prewarning):
The "ALARM 1" LED lights continuously when the insulation resistance
falls below the response value 1, RF < Ran1
Flashes: Connection fault, check earth and system (L1/+, L2/–)
6ALARM 2
(yellow)
Insulation fault 2 (alarm):
The "ALARM 2" LED lights continuously when the insulation resistance
falls below the response value 2, RF < Ran2
Flashes: Connection fault, check earth and system (L1/+, L2/–)
PGH ON
1
2
3
4
5
4.3.2 Operating controls
The representation below shows the relative position of the operating elements.
4.3.3 Access to the DIP switch and µSD card via the service cover
Open the service cover by applying a little pressure to the ribbed area. Then drag the
cover away from the device housing.
Once the cover has been removed, the following adjustments can be carried out:
• Change BMS address (SS8103)
• Set maximum leakage capacitance (SS8103)
• Change measurement speed t (SS8103)
• Reset Alarms (ST6101)
Additionally, you can read out e.g. alarms from the µSD card.
You can find a description of the DIP switch in "chapter 10. Technical data" and
"chapter 8.5 Setting the BMS address".
Controls Function
DIP switch
(SS8103)
BMS termination A4…A0
Leakage capacitance setting
Measurement speed setting
Button
(ST6101)
Alarm resetting
Firmware update
Memory card
(SDCard)
Memory for firmware and log files
(µSD-Card)
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
8
SS8103
ST6101
µSDCard
ISOMETER
®
iso1685
PGH ON

iso1685P_D00003_01_M_XXEN / 12.2016
16
Installation and connection
5. Installation and connection
5.1 Installation
Install the device using four M5 screws, also refer to the dimension diagram where the
drilling holes are illustrated. When operating he device, it has to be placed in vertical po-
sition with the system coupling (L1/+, L2/–) on top. See also the dimension diagram on
page 12.
5.2 Connection
5.2.1 Connection conditions
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 of insulation monitoring devices that do not work correctly!
Connect the terminals KE and E individually to the protective earth con-
ductor PE.
Risk of injury from sharp-edged terminals!
Risk of lacerations. Touch the enclosure and the terminals with due care.
Risk of property damage due to unprofessional installation!
If more than one insulation monitoring device is connected to a conduc-
tively connected system, the system can be damaged. If several devices
are connected, the device does not function and does not signal insulati-
on faults. Make sure that only one insulation monitoring device is connec-
ted in each conductively connected system.
DANGER
WARNING
CAUTION
CAUTION
Ensure disconnection from the IT system!
When insulation or voltage tests are to be carried out, the device must be
isolated from the system for the test period. Otherwise the device may be
damaged.
Check proper connection!
Prior to commissioning of the installation, check that the device has been
properly connected and check the device functions. Perform a functional
test using an earth fault via a suitable resistance.
All terminals are pluggable push-wire terminals. Solid connecting wires
can be directly plugged in. For connection of flexible cables, the push-wire
terminals must be pushed open by pressing the corresponding orange in-
terlocking mechanism with a flat-head screwdriver.
CAUTION

Installation and connectionInstallation and connection
iso1685P_D00003_01_M_XXEN / 12.2016
17
5.2.2 Step-by-step connection of the ISOMETER®
Connect the device according to the wiring diagram.
Proceed as follows:
1. Connect terminal E and KE to earth (PE)
2. Connect terminal A and B to the BMS bus
3. Connect terminal S to the bus conductor shield
(only at one end of the conductor)
4. Connect terminal L1/+ to L1 of the system to be monitored
5. Connect terminal L2/– to L2 of the system to be monitored
6. Connect terminal A1/A2 to the supply voltage Us
7. Connect alarm outputs 11/12/14, 21/22/24 and 31/32/34.
The coupling terminals L1/+ and L2/– are locked. To unplug the terminals,
the orange sliders must be slid towards the front (towards the device) to
unlock the terminal. Now the terminal can be unplugged.
5.2.3 Connecting the EDS to the ISOMETER®
Risk of malfunctions due to excessive locating current on sensitive
system parts!
The locating current flowing between the IT system and earth can cause
controller faults in sensitive parts of the system, such as the PLC or relay.
Ensure that the level of the locating current is compatible with the system
to be monitored.
Risk of incorrect measurement
The supplied locating current may influence other connected insulation
fault location systems. If they measure the injected locating current, the
measurement might be incorrect.
Insulation monitoring is deactivated
while the insulation fault location is active.
CAUTION
CAUTION

Installation and connection
iso1685P_D00003_01_M_XXEN / 12.2016
18
5. 3 Connection to an AC system
ISOMETER
®
iso1685
L1/+
L2/-
U
S
6A
31 32 34 11 12 1421 22 24
+
-
6A
PE
1A
1A
to COM465 or CP700
for parameter setting
2
PE
k I kT IT
I2+ I2- I1+ I1- A1 A2E KE
L2/-L1/+
A B S
K1
K3 K2
PGH ON

Installation and connection
iso1685P_D00003_01_M_XXEN / 12.2016
19
5.4 Connection example of the ISOMETER® with an insulation fault locator (EDS440-L) to a 3AC system
BMS bus
EDS44…-L
++
-
ISOSCAN®
EDS440
I L
7
6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
EDS440
ISOSCAN®
TEST
MUTE
RESET
ALARM
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11109
87
123456
9
7
ll
A1/+ A2/-
I L I n
I
∆L
I
∆n
to the
loads
to the
loads
L1
L2
L3
N
PE
US
Un
6A
ISOMETER
®
iso1685
US
6A
6A
1A
1A
k I kT IT
I2+ I2- I1+ I1- A1 A2E KE
L2/-L1/+
A B S
PGH ON
K1
K3 K2
31 32 34 11 12 1421 22 24
to COM465 or CP700
for parameter setting

Installation and connection
iso1685P_D00003_01_M_XXEN / 12.2016
20
5.5 Connection example of the ISOMETER® with an insulation fault locator (EDS460) to an AC system
BMS-Bus
EDS46…-D
to COM465 or CP700
for parameter setting
to the
loads
to the
loads
L1/+
L2/-
PE
US
Un
6A
ISOMETER
®
iso1685
U
S
6A
6A
1A
1A
k I kT IT
I2+ I2- I1+ I1- A1 A2E KE
L2/-L1/+
A B S 31 32 34 11 12 1421 22 24
SET
EDS46…L
SLAVE ADDRESS
( ERROR CODE)
TEST
RESET
2
1
ALARM
ON
1 2 3 4 5 6 7 8 9 10 11 12
ESC
I s
MONITOR
AB
A1 A2
k1 I k2
PGH ON
K1
K3 K2
+
-