Bender ISOMETER iso1685DP-425 User manual

EN
Manual
Insulation monitoring device for unearthed
AC, AC/DC and DC power supplies (IT systems)
up to AC 1000 V/DC 1500 V or AC 200 V/DC 3000 V
Software versions
iso1685DP-425: D0484 V2.1x, D0485 V1.1x
isoHV1685D-425: D0588 V2.1x, D0589 V1.0x
isoLR1685DP-325: D0538V2.0x, D0539V1.0x
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
ISOMETER®
iso1685DP-425
isoHV1685D-425
isoLR1685DP-325

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]

Content
3isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Training courses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Delivery conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 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 Address setting and termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3. Function .......................................................................................................10
3.1 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Function description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.1 Insulation monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.2 Insulation fault location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.3 Assignment of the alarm relays K1, K2, K3 . . . . . . . . . . . . . . . . . . . . . . 11
3.3.4 Deactivating the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.5 Measured value transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 History memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5 Self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5.1 Self test after connection to the supply voltage . . . . . . . . . . . . . . . . 11
3.5.2 Automatic self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5.3 Manual self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4. Device overview .........................................................................................13
4.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Display and operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.1 Display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.2 Device buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.3 Operating elements in the service lid . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.4 Operation and Navigation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
5. Installation and connection .....................................................................17
5.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
5.2 Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
5.2.1 Connection requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
5.2.2 Step-by-step connection of the ISOMETER® . . . . . . . . . . . . . . . . . . . . .18
5.2.3 Connecting the EDS to the ISOMETER® iso1685DP . . . . . . . . . . . . . .18
5.3 Connection to an AC system (L1; L2) or an DC system (+; –) . . . . . . . . .19
5.4 Connection with an insulation fault locator (EDS440/441-L)
to an 3AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.5 Connection with an insulation fault locator (EDS460)
to an AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6. Commissioning .......................................................................................... 22
6.1 Commissioning flow chart insulation fault monitoring . . . . . . . . . . . . . .22
6.2 Commissioning flow chart iso1685DP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
6.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.3.1 Setting the language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.3.2 Setting date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.3.3 Setting the profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.3.4 Setting response value Ran1 for Alarm 1 . . . . . . . . . . . . . . . . . . . . . . .23
6.3.5 Setting response value Ran2 for Alarm 2 . . . . . . . . . . . . . . . . . . . . . . .23
6.3.6 Setting EDS mode (only iso1685DP) . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.3.7 Set the EDS current(only iso1685DP) . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.3.8 TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.4 Recommissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.5 Commissioning EDS (only isoxx1685DP) . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7. Display ......................................................................................................... 26
7.1 Standard display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
7.2 Fault indication (active) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
7.3 Fault indication (inactive) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
7.4 Acknowledging a fault message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
7.5 Data-isoGraph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
7.6 History memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
7.7 Insulation fault location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

InhaltsverzeichnisInhaltsverzeichnis
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
4
8. Settings ........................................................................................................29
8.1 Overview of the device menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.2 Settings of the device menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.1 (1.0) Alarm settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 (1.1) Insulation alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 (1.1.1) Alarm 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 (1.1.2) Alarm 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 (1.2) Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 (1.3) Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 (1.4) Coupling monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.2 (1.5) Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.5.1) Digital 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.5.1.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.5.1.2) t(on) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.5.1.3) t(off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.5.1.4) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.5.2) Digital 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.6) Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.6.1) Relay 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.6.1.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.6.1.2) Operating mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.6.2) Relay 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 (1.6.3) Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 (1.6.3.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 (1.6.3.2) Function 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 (1.6.3.3) Function 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 (2.0) EDS (insulation fault location only iso1685DP) . . . . . . . . . . . . . 32
8.2 (2.1) General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 (2.1.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 (2.1.2) Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2 (2.2) Scanning channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2 (2.3) Activating channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2 (2.4) Group settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2 (2.4.1) Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 (2.4.1.1) Current transformer (CT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 (2.4.1.2) CT monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 (2.4.1.3) I∆L Response value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 (2.4.1.4) I∆n Response value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 (2.4.2) Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 (2.4.2.1) Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 (2.4.2.2) Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.2 (2.4.2.3) Digital output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.2 (2.4.2.4) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.2.5) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.2.6) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.3) Dig. input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.3.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.3.2) t(on) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.3.3) t(off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.3.4) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.4) Device settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.4.1) System type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.4.2) Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 (2.4.4.3) Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.4.4.4) Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.5) Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.5.1) Name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.5.2) Current transformer monitoring . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.5.3) Response value I∆L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.5.4) Response value I∆n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6) Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.1) Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.1.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.1.2) Operating mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.1.3) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.1.4) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.1.5) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.2) Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.2.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.2.2) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.2.3) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.2.4) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.2 (2.6.3) Digital output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.6.3.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.6.3.2) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.6.3.3) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.6.3.4) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.7) Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.7.1) Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.7.2) t(on). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.7.3) t(off). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.7.4) Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Content
5isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
8.2 (2.8) Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.8.1) Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.8.2) Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (2.9) Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (3.0) Data measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (4.0) Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (5.0) History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 (6.0) Device settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.1) Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.2) Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.2.1) Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.2.2) Format (time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.2.3) Summer time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.2.4) Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.2.5) Format (date). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.2 (6.3) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.2) BMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.2.1) BMS address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.3) Modbus/RTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.3.1) Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.3.2) Baud rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.3.3) Parity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.3.3.4) Stop Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.4) Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.4.1) Brightness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.5) Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.5.1) Password. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.5.2) Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.6) Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (6.7) Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.2 (7.0) Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
8.3 Factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9. Device communication via the BMS bus ............................................... 42
9.1 RS-485 interface with BMS protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
9.1.1 Topology RS-485 network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
9.1.2 BMS protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.1.3 BMS master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.1.4 Commissioning of an RS-485 network with BMS protocol . . . . . . .43
9.1.5 Setting BMS address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.1.6 Alarm and operating messages via the BMS bus . . . . . . . . . . . . . . . .44
9.1.6.1 Alarm messages ......................................................................................................... 44
9.1.6.2 Operating messages ................................................................................................ 44
9.1.6.3 Resetting error messages ...................................................................................... 44
9.1.6.4 Error codes ................................................................................................................... 45
9.2 Modbus/RTU Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
10. Insulation fault location (only iso1685DP) ......................................... 46
10.1 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.2 Required settings for insulation fault location . . . . . . . . . . . . . . . . . . . . .46
10.3 Indication on the display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.4 Starting and stopping the insulation fault location. . . . . . . . . . . . . . . . .46
11. Device profiles ......................................................................................... 47
12. Alarm messages .......................................................................................48
13. Diagrams ...................................................................................................49
13.1 Response time profile Power circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
13.2 Response time profile High capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . .49
13.3 Response time profile Inverter > 10 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
13.4 Response time profile Inverter < 10 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
13.5 Response time profile Fast 2000 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
13.6 Leakage capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
14. Technical data .......................................................................................... 51
14.1 Tabular data iso1685Dxx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
14.2 Standards and certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
14.3 Ordering details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Index...........................................................................................................54

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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
For commissioning and troubleshooting Bender offers you:
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]*
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 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
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
7
1.2.3 Customer service
On-site service for all Bender products
• Commissioning, parameter setting, maintenance, troubleshooting for Bender prod-
ucts
• 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: [e-mail]
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 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 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.

isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
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
This manual is intended for qualified personnel working in electrical
engineering and electronics!
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.
DANGER
Danger as a result of excessive locating current or excessive locating
voltage!
An excessive locating current of the internal locating current injector may
damage sensitive loads (e.g. control circuits) or trigger unwanted switch-
ing operations. Select a low locating current for these systems. In case of
doubt, please contact our service department.
DANGER
Risk of electric shock!
When opening the device, you may come into contact with live parts.
Switch off the mains voltage before opening the device!
WARNING
Make sure that the basic settings meet the requirements of the IT system.
Persons without the required expertise, in particular children, must not
have access to or contact with the ISOMETER®.
CAUTION
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 ISO-
METER® is connected in each interconnected system. If IT systems are in-
terconnected 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 ISOME-
TER®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.

Safety instructionsSafety instructions
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
9
2.4 Address setting and termination
Correct address setting and termination is essential for proper functioning of the
iso1685… series insulation monitoring device.
Ensure correct address setting and termination of the device!
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).
CAUTION
Risk of bus errors!
Double assignment of addresses on the respective BMS busses can cause
serious malfunctions.
2.5 Intended use
The device is used for monitoring the insulation resistance in large power supply systems
designed as IT systems. The specific measurement technique (AMP+) monitors the insu-
lation resistance also in installations where extremely high system leakage capacitances
to earth exist due to interference suppression methods. The adjustment also to high sys-
tem leakage capacitances occurs automatically.
The device generates locating current pulses required for insulation fault location. That
allows the localisation of the insulation fault using permanently installed or mobile insu-
lation 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, the equipment must be ad-
justed to local equipment and operating conditions by means of customised parameter
settings. Please heed the limits of the range of application indicated in the technical data.
Any other use than that described in this manual is regarded as improper.
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.

isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
10
Function
3. Function
3.1 Features
• ISOMETER® for IT AC systems with galvanically connected rectifiers or inverters and
for IT DC systems (IT = unearthed systems)
• Automatic adaptation to the existing system leakage capacitance
• Combination of and other profile-specific measurement methods
• Two separately adjustable response value ranges of 1 k…10 M for Alarm 1 and
Alarm 2
• Hgh-resolution graphical LC display
• Connection monitoring (monitoring of the measuring lines)
• Automatic device self test
• Graphical representation of the insulation resistance over time (isoGraph)
• History memory with real-time clock (buffer for three days) for storing 1023 alarm
messages with date and time
• Freely programmable digital inputs and outputs
• Remote setting via the Internet or Intranet (COMTRAXX® gateway)
• Worldwide remote diagnosis via the Internet (made available by Bender Service
only)
• RS-485 interface for data exchange to other Bender devices
iso1685DP-425
• measuring insulation faults 200…1M
isoLR1685DP-325
• Measunring insulationfaults 20…100k
isoHV1685DP-425
• measuring insulation faults 200…1M at mains voltages AC 2000V, DC 3000 V
iso1685DP-425 and isoLR1685DP-325
• Locating current injection for selective insulation fault location
• Indication of the insulation faults selectively located by the EDS system
• Parameter setting of EDS systems
• Customer-specific texts for each measuring channel
AMPPlus
3.2 Product description
The ISOMETER® isoxx1685Dx-x25 is used for insulation monitoring of extensive IT sys-
tems . The specially developed measurement method monitors the insulation resistance
also in installations where extremely high system leakage capacitances against earth ex-
ist due to interference suppression methods. Adaptation to system-related high leakage
capacitances also occurs automatically.
The ISOMETER® iso1685Dxx generates locating current pulses required for insulation
fault location. That allows the localisation of the insulation fault using permanently in-
stalled or mobile insulation fault locators.
3.3 Function description
Insulation monitoring is carried out using an active measuring pulse which is superim-
posed onto the IT system to earth via the integrated coupling. When the insulation resist-
ance between the IT system and earth falls below the set prewarning response value
Ran1, the “ALARM 1” LED lights and the relay K1 (11/12/14) switches. When the insulation
resistance falls below the alarm response value Ran2, the alarm relay K2 (21/22/24) switch-
es and the “ALARM 2” LED lights.
The locating current injector integrated in the device for insulation fault location is acti-
vated externally via the BMS interface. When starting the insulation fault location, the LED
“PGH ON” signals the locating current pulse.
The ISOMETER® cannot take over the master function. If there is no master in the system,
the device can act as a backup master and communicate with the slaves in the system.
3.3.1 Insulation monitoring
For insulation monitoring, a pulsating AC measuring voltage is superimposed onto the IT
system. The measuring pulse consists of positive and negative rectangular impulses of
the same amplitude. The period duration depends on the system leakage capacitances in
each case and the insulation resistances of the system to be monitored.
Pic. 3.1: Pulse sequence of the measuring voltage for insulation fault monitoring
U
m
t

FunctionFunction
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
11
An insulation fault between the IT system and earth closes the measuring circuit. If the in-
sulation resistance between system and earth falls below the set response values Ran1
and Ran2 (response value Ran1 can be set equal or higher than Ran2), the associated alarm
relays K1 (11, 12, 14) or K2 (21, 22, 24) switch. Detected insulation faults are signalled to
other bus devices via the BMS bus. In addition, the alarm LEDs Alarm 1 or Alarm 2 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 insulation fault locators of the EDS… series can locate insulation
faults. The ISOMETER® utilises an internal locating current injector with IL£ 50 mA DC.
Pic. 3.2: Pulse sequence of the internal locating current injector for insulation fault location
If the EDS function is activated, the ISOMETER® starts the insulation fault location after the
value has fallen below the response values Ran1 and Ran2. When starting the insulation
fault location, the LED "PGH on" signals the locating current pulse.
3.3.3 Assignment of the alarm relays K1, K2, K3
K1 switches when the value falls below the alarm response value Ran1 (insul. resistance).
K2 switches when the value falls below the alarm response value Ran2 (insul. resistance).
K3 switches in the event of a device error or a connection fault.
During the insulation fault location process, the function of insulation re-
sistance measurement is deactivated and the coupling is disconnected
from the mains.
2 s 4 s 2 s 4 s
I
L
t
3.3.4 Deactivating the 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 message Device inactive ap-
pears on the display. The IT system is NOT being monitored!
The device uncouples itself from the system to be monitored through an internal system
isolating switch.
Activation or deactivation is done via
• a digital input
• the menu item Alarm settings
• the BMS bus
The standby mode of the ISOMETER®, for example, enables application in coupled sys-
tems, since in interconnected systems only one insulation monitoring device is allowed
to be connected in each system.
3.3.5 Measured value transmission
All recorded measured values, operating messages and alarms are made available via the
BMS bus.
3.4 History memory
All warnings, alarms and device errors are stored in the internal history memory with date
and time stamp. The time the event started, the time of acknowledgement and the end
of the event are recorded. The history memory can be called up and reset via the device
menu (see "History" on page 38).
3.5 Self test
3.5.1 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. The self test is completed after approx. 60 s. Afterwards, the
normal measurement mode begins.
If a device error or a connection fault is detected, the corresponding alarm will be indicat-
ed in the display as well as via the alarm relay K3 (31-32-34). This relay continuously oper-
ates in N/C operation, i.e. it de-energises even in case of a complete device failure.

FunctionFunction
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
12
During this self test, when the device is being started, the alarm relays are not switched.
3.5.2 Automatic self test
All supply voltages are continuously monitored. The following tests are continuously car-
ried out in the background:
• Connection E-KE
• Temperature monitoring of coupling and locating current injector
A self test is automatically run at 24-hour intervals.
During the automatic self test, the alarm relays K1 (11-12-14) and K2 (21-22-24) are not
switched. K3 won't be switched either.
3.5.3 Manual self test
The self test is started via the Test button of the ISOMETER®.
The following tests are only carried out in the manual self test mode:
• Internal Flash
• CPU register
• Watchdogs
• Oscillator
• Restart of the device including re-initialisation and recalibration
• Connection monitoring system
During the manual self test, all alarm relays are switched.
√
33 %
Test successful
Test not successful
Test not available
(e.g. faulty device settings).
Test is being carried out.
Measurement
Coupling
Connection to earth
Outputs
TEST

isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
13
4. Device overview
4.1 Dimensions
ISOMETER
®
iso1685
PGH ON
246
12540,5
40,75
51
368
383
401,5
106
64
8,75
5,2
61,8
76,6
39,8
55,7

isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
14
4.2 Connections
I2+ I2- I1+ I1-
I2+ I2- I1+ I1-
CAN1 CAN 2 RS-485
Term.
off on A B S
A B S
k l kT IT
k I kT IT
31 32 34
K3
31 32 34
21 22 24
K2
21 22 24
11 12 14
K1
11 12 14
E KE
E KE
A1 A2
A1 A2
I2+
I2–
I1+
I1–
Digital inputs
RS-485 Term.
off
on
CAN 1
CAN 2
No function
A, B, S
RS-485 bus
connection (A,B)
protocol: BMS
S= PE potential
Connect one end of
shield
K
I
kT
IT
No function
31, 32, 34
Relay output for
internal
device errors
(SERVICE LED)
21, 22, 24
Relayoutput for alarm
insulation fault
11, 12, 14
Relay output for
alarm insulation
fault
E, KE
Separate connection of E (earth) and
KE (reference) to PE.
Connect both to PE
A1, A2
Supply voltage UsDC 24 V
Arbitrary polarity
Connection via fuses, 6 A each
L2/L-
L2/-
L1/L+
L1/+
Coupling terminal L2/–.
Connection to L2/– of the IT system
via 1 A fuse
Coupling terminal L1/+.
Connection to L1/+ of the IT system
via 1 A fuses

Device overviewDevice overview
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
15
4.3 Display and operating elements
4.3.1 Display elements
1ON
(green) The operation indicator lights continuously.
2
The device display shows information regarding the device and the
measurements.
Further information see "Display" on page 26.
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.
The LED "PGH ON" is only activated at iso1685DP.
4SERVICE
(yellow)
When a device error is detected, the SERVICE LED lights.
If the LED stays lit, please check the error code list.( see "Device communi-
cation via the BMS bus" on page 42)
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
6
7
8
9
10
11
12
4.3.2 Device buttons
You can adjust the device settings in the respective menu using the menu buttons. De-
pending on the menu entry, one of the options displayed below is assigned to the but-
tons.
4.3.3 Operating elements in the service lid
7
MENU Opens the device menu.
ESC Cancels the current process or
navigates one step back in the device menu.
8EDS Opens the EDS menu (only iso1685DP).
Navigates up in a list or increases a value.
9
TEST Starts the device self test.
Navigates forwards (e.g. to the next setting step) or
selects a parameter.
10
RESET Resets alarms.
Navigates backwards (e.g. to the previous setting step) or
selects a parameter.
11 INFO Shows information.
OK Confirms an action or a selection.
12 DATA Indicates data and values.
Navigates down in a list or reduces a value.
Operating elements Function
DIP switch (SS8103) No function
Button (ST6101) Alarm reset
Memory card (SD Card) No function

Device overviewDevice overview
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
16
4. 4 Operation and Navigation
Navigate through the device menu using the device buttons. The functions of the device
buttons are described in the chapter “Device buttons” on page 15.
Navigation in lists
To make a selection in a list, navigate
using the and buttons to the re-
quired menu item. Then click "OK".
Navigation with arrows
You can increase or decrease a value us-
ing the and buttons. You can
move to the left or the right to set differ-
ent values using the and buttons.
The value positioned between the
symbols is the value that is set.
lle
Current 6.6.9
o 1mA
o 1.5mA
o 2.5mA
o 3mA
o 10mA
lle
Current 6.6.9
o 1mA
o 1.5mA
o 2.5mA
o 3mA
o 10mA
lle
Date 6.6.3
14.08.2016
min. 1
max. 31

isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
17
Installation and connection
5. Installation and connection
5.1 Installation
Install the device using four M5 screws, refer also to the dimension diagram where the
drilling holes are illustrated (see "Dimensions" on page 13). Install the device so that it is
in a vertical position with the system coupling (L1/+, L2/–) positioned at the top when it
is being operated.
5.2 Connection
5.2.1 Connection requirements
CAUTION
Heat on the enclosure surface!
The surface temperature of 60 °C may be exceeded in case of specific ope-
rating modes. Keep the cooling slots free by keeping distance of at least 15
cm to the top and at least10 cm to the bottom to adjacent objects in order
to guarantee a constant air circulation.
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
Risk of injury from sharp-edged terminals!
Risk of lacerations. Touch the enclosure and the terminals with due care.
CAUTION
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 insula-
tion faults. Make sure that only one insulation monitoring device is con-
nected in each conductively connected system.
CAUTION
This signal word indicates a low-level risk that can result in minor or
moderate injury or damage to property if not avoided.
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.
Pluggable push-wire terminals
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.

Installation and connectionInstallation and connection
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
18
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.
5.2.3 Connecting the EDS to the ISOMETER® iso1685DP
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.
CAUTION
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.
CAUTION
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.

Installation and connection
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
19
5. 3 Connection to an AC system (L1; L2) or an DC system (+; –)
ISOMETER
®
iso1685
L1 / +
L2 / –
U
S
2A
31 32 34 11 12 1421 22 24
+
-
2A
PE
1A
1A
BMS-Master
2
PE
k I kT IT
I2+ I2- I1+ I1-
AC
DC
A1 A2E KE
L2/-L1/+
A B S
K1
K3 K2
PGH ON

Installation and connection
isoxx1685Dx-x25_D00272_05_M_XXEN/04.2018
20
5.4 Connection with an insulation fault locator (EDS440/441-L)
to an 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 LI n
I∆L
I∆n
to the
loads
to the
loads
L1
L2
L3
N
PE
US
Un
6A
to COM465 or CP700
for parameter setting
ISOMETER
®
iso1685
U
S
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