Bender ISOMETER iso685W-S-B User manual

Manual
EN
iso685-D-B_D00177_01_M_XXEN/01.2016
ISOMETER® iso685-D-B
iso685W-D-B
iso685-S-B
iso685W-S-B
Insulation Monitoring Device for IT AC systems
with galvanically connected rectifiers and inverters
and for IT DC systems

Bender GmbH & Co. KG
P.O. Box 1161 • 35301 Gruenberg • Germany
Londorfer Straße 65 • 35305 Gruenberg • Germany
Tel.: [phone]
Fax: [phone]
Email: [e-mail]
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 Gruenberg • Germany
Tel.:[phone]
Fax:[phone]
Email: [email protected]
PLEASE READ THIS MANUAL AND ANY ACCOMPANYING DOCUMENTS CAREFULLY
AND KEEP THEM IN A SECURE PLACE FOR FUTURE REFERENCE.

iso685-D-B_D00177_01_M_XXEN/01.2016
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1. Safety instructions ........................................................ 7
1.1 Explanation of symbols and notes . . . . . . . . . . . . . . . . . . . . . 7
1.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Warranty and liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.1 Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.2 About the operating manual . . . . . . . . . . . . . . . . . . . . . . 8
1.3.3 Hazards when handling the ISOMETER®
iso685-D-B/-S-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.4 Inspection, transport and storage . . . . . . . . . . . . . . . . . 8
1.3.5 Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2. Function ......................................................................... 9
2.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Special characteristics ISOMETER® iso685-S-B with
front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5 Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6 Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Device overview .......................................................... 11
3.1 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Device variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Connections and panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4. Mounting ...................................................................... 14
4.1 Screw mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 DIN rail mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5. Connection ...................................................................15
5.1 Connection conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Connection to a 3(N)AC system/system type 3AC . . . . . 16
5.3 Connection to an AC system/system type AC . . . . . . . . . 16
5.4 Connection to a DC system/system type DC . . . . . . . . . . 17
5.5 Connection to the X1 interface . . . . . . . . . . . . . . . . . . . . . . . 17
5.6 Connection to the supply voltage . . . . . . . . . . . . . . . . . . . . 18
5.6.1 Connection to A1/+, A2/- . . . . . . . . . . . . . . . . . . . . . . . . 18
5.6.2 Connection to X1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.7 Connection to the Ethernet interface . . . . . . . . . . . . . . . . . 19
5.8 Connection to the relay 1 interface (11 12 14) . . . . . . . . 19
5.9 Connection to the relay-2 interface (21 22 24). . . . . . . . 20
6. Commissioning ...........................................................20
6.1 Device buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2 General initial commissioning process . . . . . . . . . . . . . . . 20
6.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.1 Set language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.2 Set time and date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.3 Set system type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3.4 Set profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.3.5 Set response value Ran1 for Alarm 1 . . . . . . . . . . . . . 22
6.3.6 Set response value Ran2 for Alarm 2 . . . . . . . . . . . . . 22
6.4 Recommissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table of contents

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7. Display .......................................................................... 23
7.1 Standarddisplay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.2 Fault display (active) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3 Fault display (inactive) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.4 Acknowledge fault message . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.5 Data-isoGraph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.6 History memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8. Menu ............................................................................. 27
1. Alarm settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.1 Insulation alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.1.1 Alarm 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.1.2 Alarm 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.1.3 Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.2 Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.3 System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.4 ISONet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.4.1 ISONet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.4.2 Number of devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1.5 Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.6 T(Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.7 Coupling monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8 Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8.1 Digital 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8.1.1 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8.1.2 t(on) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8.1.3 t(off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8.1.4 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8.2 Digital 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.8.3 Digital 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1.9 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.1 Relay 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.1.1 TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.1.2 Relay mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.1.3 Function 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.1.4 Function 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.1.5 Function 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.2 Relay 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1.9.3 Digital 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.3.1 TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.3.2 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.3.3 Function 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.3.4 Function 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.4 Digital 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.5 Buzzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.5.1 TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.5.2 Function 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.5.3 Function 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.5.4 Function 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.6 Analog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.6.1 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1.9.6.2 Scale centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
1.9.6.3 TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
1.9.6.4 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2. Data measured values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3. Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4. History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5. Device settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.1 Language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2 Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.1 Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.2 Format (time). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.3 Summer time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.4 Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.5 Format (date). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.6 NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.7 NTP server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2.8 UTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table of contents

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5.3 Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.1 Write access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2 Ethernet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2.1 DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2.2 IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2.3 SN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2.4 Std. GW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2.5 DNS server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.2.6 Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3 BCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3.1 System name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3.2 Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3.3 Device address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3.4 Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3.5 TTL for subscription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.3.4 Modbus/TCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.3.4.1 Port 502 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.3.5 BMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4.1 Brightness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.5 Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.5.1 Password. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.5.2 Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.6 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.7 Data backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.8 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6. Info. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9. Device communication .............................................. 36
9.1 Ethernet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.2 BCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.3 Modbus/TCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.4 Web server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10. Special functions for coupled IT systems .............38
10.1 Particularities when monitoring coupled IT systems . 38
10.2 System isolation via digital input with two
coupled systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10.3 System isolation via digital input with several
coupled systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
10.4 System isolation via ISOnet . . . . . . . . . . . . . . . . . . . . . . . . . 39
11. Settings .......................................................................41
11.1 Profile overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
11.2 Settings insulation alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
11.3 Digital input mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
11.4 Typical circuit of the digital inputs. . . . . . . . . . . . . . . . . . . 42
11.5 Digital output modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
11.6 Description of the output functions . . . . . . . . . . . . . . . . . 43
11.7 Description of the analogue output. . . . . . . . . . . . . . . . . 44
11.7.1 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
11.7.2 Midscale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
11.7.3 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table of contents

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12. Diagrams .................................................................... 46
12.1 Response time profile power circuits . . . . . . . . . . . . . . . . 46
12.2 Response time profile control circuits . . . . . . . . . . . . . . . 46
12.3 Response time profile generator . . . . . . . . . . . . . . . . . . . . 47
12.4 Response time profile high capacitance . . . . . . . . . . . . . 47
12.5 Response time profile inverter > 10 Hz . . . . . . . . . . . . . . 48
12.6 Response time profile inverter < 10 Hz . . . . . . . . . . . . . . 48
12.7 Relative uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
13. Alarm messages ........................................................ 50
14. Technical data ........................................................... 52
14.1 Data in tabular form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
14.2 W option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
14.3 Standards and certifications . . . . . . . . . . . . . . . . . . . . . . . . 54
14.4 Ordering details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Index ................................................................................... 56
Table of contents

iso685-D-B_D00177_01_M_XXEN/01.2016
7
1. Safety instructions
1.1 Explanation of symbols and notes
This manual is intended for qualified personnel working in electrical
engineering and electronics!
To make it easier for you to understand and revisit certain sections of text and
instructions in this manual, we have used symbols to identify important instruc-
tions and information.
DANGER: This signal word indicates that there is a high risk of dan-
ger that will result 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.
NOTE: This symbol denotes information intended to assist the user
in making optimum use of the product.
DANGER
WARNING
CAUTION
1.2 Intended use
The ISOMETER® iso685-D-B/-S-B monitors the insulation resistance of unearthed
AC/DC main circuits (IT systems) with mains voltages of AC 0…690 V or
DC 0…1000 V. The nominal voltage range Un can be extended via coupling
devices.
DC components existing in AC/DC systems do not influence the operating charac-
teristics. Due to the separate supply voltage, de-energised systems can also be
monitored. The maximum permissible system leakage capacitance is 0…1000 µF,
depending on the profile.
Any other use than that described in this manual is regarded as improper. The
Bender companies shall not be liable for any losses or damage resulting from im-
proper use. Intended use implies:
The observation of all information in the operating manual.
Compliance with test intervals.
As a basic principle, our "General Conditions of Sale and Delivery" shall apply. At
the latest, these shall be available to the operator when the contract is concluded.
When using ISOMETER®s in IT systems, make sure that only one ac-
tive 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 sys-
tem and deactivated. IT systems coupled via diodes or capacitanc-
es may also influence the insulation monitoring process so that a
central control of the different ISOMETER®s is required.

iso685-D-B_D00177_01_M_XXEN/01.2016
8
1.3 Warranty and liability
Warranty and liability claims in the event of injury to persons or damage to prop-
erty are excluded if they can be attributed to one or more of the following causes:
• Use of the ISOMETER® other than for its intended purpose
• Incorrect assembly or installation, commissioning, operation and maintenance
of the ISOMETER®
• Non-observance of instructions in this operating manual regarding transport,
commissioning, operation and maintenance of the ISOMETER®
• Unauthorised changes to the ISOMETER® made by parties other than the
manufacturer
• Non-observance of technical data. Repairs carried out incorrectly and the use of
replacement parts or accessories not approved by the manufacturer
• Case of disasters and force majeure
• Assembly and installation with device combinations not recommended by the
manufacturer
This operating manual, especially the safety instructions, must be observed above
all by personnel who work on the ISOMETER®. In addition, the rules and regula-
tions that apply for accident prevention at the place of use must be observed.
1.3.1 Personnel
Only appropriately qualified personnel may work with the ISOMETER®. Personnel
who are familiar with the assembly, commissioning and operation of the product
and have undergone appropriate training are considered qualified. Personnel
must have read this manual and understood all instructions relating to safety.
1.3.2 About the operating manual
This manual has been compiled with great care. It may nevertheless contain errors
and mistakes. Bender cannot accept any liability for injury to persons or damage
to property resulting from errors or mistakes in this manual.
1.3.3 Hazards when handling the ISOMETER® iso685-D-B/-S-B
The ISOMETER® are built in accordance with state-of-the-art technology and the
recognised safety regulations. However, the use of such devices may introduce
risks to the life and limb of the user or third parties and/or result in damage to the
ISOMETER® or other property.
Only use the ISOMETER®:
•As intended
• In perfect working order
Immediately rectify any faults that may endanger safety. Do not make any unau-
thorised changes and only purchase spare parts and optional accessories recom-
mended by the manufacturer of the devices. Failure to observe this requirement
can result in fire, electric shock and injury.
Unauthorised persons must not have access to or contact with the ISOMETER®.
Reference signs must always be clearly legible. Replace damaged or illegible signs
immediately.
1.3.4 Inspection, transport and storage
Inspect the packaging and equipment packaging for damage, and compare the
contents of the package with the delivery documents. In the event of damage in
transit, please inform the Bender company immediately.
The devices must only be stored in areas where it is protected from dust, damp
and spray or dripping water, and in which the specified storage temperatures can
be assured.
1.3.5 Note
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 proper connection
of the device, a functional test has to be carried out before starting the system.
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®.
1. Safety instructions

iso685-D-B_D00177_01_M_XXEN/01.2016
9
2. Function
2.1 Features
• ISOMETER® for IT AC systems with galvanically connected rectifiers or inverters
and for IT DC systems (IT = unearthed systems).
• The operating range of the nominal voltage Un can be extended via coupling
devices.
• Automatic adaptation to the existing system leakage capacitance.
• Combination of and other profile-specific measurement methods.
• Two separately adjustable response value ranges of 1 kΩ…10 MΩ for Alarm 1
and Alarm 2.
• High-resolution graphic LC display for excellent readability and recording of the
device status.
• 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.
• Current and voltage output 0(4)…20 mA, 0…400 µA, 0…10 V, 2…10 V
(galvanically separated) which is analogous to the measured insulation value of
the system.
• Freely programmable digital inputs and outputs.
• Remote setting via the Internet or Intranet
(Webserver / Option: COMTRAXX® Gateway).
• Worldwide remote diagnosis via Internet.
• ISOnet: Internal isolation of the ISOMETER®
(via control signal or terminals I1, I2, I3 of the plug X1) from the IT system to be
monitored (e.g. when coupling several ISOMETER®s).
• Modbus TCP, web server and BCOM.
*
2.2 Product description
The ISOMETER® iso685-D-B/-S-B is an insulation monitoring device for IT systems
according to IEC 61557-8. It is universally applicable in AC, 3(N)AC, AC/DC and DC
systems. AC systems may include extensive DC-supplied loads (such as rectifiers,
inverters, variable-speed drives).
2.3 Special characteristics ISOMETER® iso685-S-B with front
panel
The ISOMETER® iso685-D-B is a device of the iso685 device family with integrated
display. This manual applies in full to the ISOMETER® iso685-D-B.
Das ISOMETER® iso685-S-B is the sensor variant of the ISOMETER® iso685-D-B. The
only difference is that it does not feature a display. The ISOMETER® iso685-S-B must
be used in combination with a front panel because the device is operated via the
front panel. The operation of the front panel is similar to the operation of the ISO-
METER® iso685-D-B, which is described in this manual.
The ISOMETER® iso685-D-B, which is similar to the combination of ISOMETER®
iso685-S-B and front panel (e.g. FP200), is described below.
2.4 Functional description
The insulation monitoring device ISOMETER® iso685-D-B continuously monitors
the entire insulation resistance of an IT system during operation and triggers an
alarm when the value falls below a preset response value. To obtain a measure-
ment the device has to be connected between the IT system (unearthed system)
and the protective earth conductor (PE). A measuring current in the µA range is su-
perimposed onto the system which is recorded and evaluated by a micro-
controlled measuring circuit. The measuring time is dependent on the selected
measurement profiles, the system leakage capacitance, the insulation resistance
and possible system-related disturbances.

iso685-D-B_D00177_01_M_XXEN/01.2016
10
The response values and other parameters are set using a commissioning wizard
or via different setup menus using the device buttons and a high-resolution
graphical LC display. The selected settings are stored in a permanent fail-safe
memory. Different languages can be selected for the setup menus as well as the
messages indicated on the display. The device utilises a clock for storing fault
messages and events in a history memory with time and date stamp. The settings
can be protected against unauthorised modifications by entering a password. To
ensure proper functioning of connection monitoring, the device requires the
setting of the system type 3AC, AC or DC and the
required use of the appropriate
terminals
L1/+, L2, L3/-.
To extend the nominal voltage range, different coupling devices are available as
accessories which can be selected from a menu where the required adjustments
can also be made. The insulation monitoring device iso685 is able to measure the
insulation resistance reliably and precisely in all common IT systems (unearthed
systems). Due to various applications, system types, operating conditions, appli-
cation of variable-speed drives, high system leakage capacitances etc., the meas-
urement technique must be able to meet varying requirements in order to ensure
an optimised response time and relative uncertainty. Different measurement pro-
files which can be selected from a setup menu allow optimum adaptation of the
measurement technique to the specific application.
If the preset response value falls below the value of Alarm 1 and/or Alarm 2, the
associated alarm relays switch, the LEDs Alarm 1 resp. Alarm 2 light and the meas-
ured value is shown on the LC display (in case of insulation faults in DC systems, a
trend graph for the faulty conductor L+/L- is displayed). If the fault memory is ac-
tivated, the fault message will be stored. Pressing the RESET button resets the in-
sulation fault message, provided that the insulation resistance is at least 25 %
above the preset response value. As additional Information, the quality of the
measuring signal and the time required to update the measured value are shown
on the display. A poor signal quality (1-2 bars) may be an indication that the wrong
measurement profile has been selected.
The insulation monitoring device iso685-D-B has an internal system isolating
switch, which makes it possible to operate several ISOMETER®s in coupled IT sys-
tems. For this purpose, the ISOMETER®s are connected via an Ethernet bus. The in-
tegrated Isonet function ensures that only one ISOMETER® is actively measuring at
a time, while the other devices are completely isolated from the system and wait-
ing in standby mode for measuring permission.
2.5 Interfaces
• Communication protocol Modbus/TCP
• BCOM for communication of Bender devices via Ethernet
• Integrated web server for reading out measured values and for parameter set-
ting
2.6 Self-test
After switching on the supply voltage, the ISOMETER, by means of the self-test
functions, automatically and continuously checks all internal measuring func-
tions, the components of the process control, such as the data and parameter
memory, as well as the connections to the IT system and earth.
A manual self test can also be activated by means of the test button to check the
relay function (depending on the configuration).
The progress of the manual self test is shown on the LCD by a bar graph. Depend-
ing on the conditions in the IT system being monitored, the self test is completed
after 15...20 seconds. The device then returns to the standard mode (i.e. measure-
ment mode) and the actual measured value will be displayed after the measuring
time has expired.
The display shows the initial measurement message until the first valid value is
measured.
If an error is detected during a self-test, the corresponding device LEDs light (see
“Alarm messages” on page 50). In addition, the appropriate message is displayed
on the LCD and an output, if configured, provides a corresponding signal.
2. Function

iso685-D-B_D00177_01_M_XXEN/01.2016
11
3. Device overview
3.1 Dimensions
108 mm
110 mm
mm 39

iso685-D-B_D00177_01_M_XXEN/01.2016
12
3.2 Device variants
iso685-D-B: The device version iso685-D-B features a high-resolution graphical LC display and control elements for direct operating of the device functions.
iso685-S-B: Device version iso685-S-B neither features a display nor operating controls. It can only be used in combination with FP200 and is indirectly operated via
this front panel.
Option "W": Device variants with option W are available in case of extreme climatic and mechanical conditions.
ISOMETER® iso685-D-B
ISOMETER® iso685-S-B with front panel FP200 connected via RJ45 cable
3. Device overview

iso685-D-B_D00177_01_M_XXEN/01.2016
13
3.3 Connections and panel
A1/+, A2/- Connection to the power supply voltage Us
L1/+ Connection to the IT system to be monitored
L2 Connection to the IT system to be monitored
L3/- Connection to the IT system to be monitored
KE, E Connection to PE
Top
Front
Reset
Data
LED display: SERVICE, ALARM 1, ALARM 2
Menu
ESC
Test
Info
OK
X3 Optional expansion module for Bender devices
LED display: ON/OFF
Display
ETH
X1 Digital interface
ETH Ethernet interface
R Selectable resistance R
11 12 14 Connector for alarm relay 1
21 22 24 Connector for alarm relay 2
Bottom
3. Device overview

iso685-D-B_D00177_01_M_XXEN/01.2016
14
4. Mounting
4.1 Screw mounting
15. Fix the three mounting clips delivered with the device (two of them packed
separately) manually or using a tool, as illustrated below.
16. Drill the mounting holes for the M4 thread according to the dimensioned
drilling template.
17. Fix the ISOMETER® iso685-D-B with three M4 screws.
72 mm
108 mm
54 mm
100 mm
107,3 mm
4.2 DIN rail mounting
1. Fix the three mounting clips delivered with the device (two of them packed
separately) manually or using a tool, as illustrated below.
2. Fix the ISOMETER® iso685-D-B onto the DIN rail until it snaps into place.

iso685-D-B_D00177_01_M_XXEN/01.2016
15
5. Connection
5.1 Connection conditions
Consider the minimum distance to adjacent devices:
lateral 0 mm, top 20 mm, bottom 20 mm.
Risk of electric shock!
Nominal voltages up to 1000 V may be present on the terminals L1/
+ to L3/- which can be lethal. Make sure that the terminal covers
are properly mounted and clicked in before you use the device.
Risk of electric shock!
High voltage is applied to the terminals which can be lethal if di-
rectly contacted. If the device is connected via the terminals L1/+,
L2, L3/- to an IT system that is live,‐for operational reasons, termi-
nals KE and E must not be disconnected from th protective earth
conductor (PE).
Warning of insulation monitoring devices that do not work
correctly!
Connect the terminals KE and E individually to the protective earth
conductor PE.
Risk of injury from sharp-edged terminals!
Risk of lacerations.
Touch the enclosure and the terminals with due care.
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.
DANGER
DANGER
WARNING
CAUTION
CAUTION
Risk of property damage due to unprofessional installation!
If more than one insulation monitoring device is connected to a
conductively connected system, the system can be damaged. If
several devices are connected, the device does not function and
does not signal insulation faults. Make sure that only one insula-
tion monitoring device is connected in each conductively connect-
ed system.
The ISOMETER® iso685-D-B is suitable for use in coupled systems.
For the necessary parameter setting, refer to “Special functions for
coupled IT systems” from page 38
Risk of property damage due to unprofessional installation!
The connecting lines L1/+, L2, L3/- to the system to be monitored
must be carried out as spur lines. Inadmissible load current can re-
sult in damage to property and personal injury. Do not run any
load current through the terminals.
Check proper connection!
Prior to commissioning of the installation, check that the device
has been properly connected and check the device functions. Per-
form a functional test using an earth fault via a suitable resistance.
Prevent measurement errors!
When the AC system being monitored contains galvanically cou-
pled DC circuits, observe that: an insulation fault can only be de-
tected correctly when the rectifier valves carry a minimum current
of > 10 mA.
For UL applications:
Only use 60/70°C copper lines!
UL and CSA application require the supply voltage to be protected
via 5-A fuses.
CAUTION
CAUTION

iso685-D-B_D00177_01_M_XXEN/01.2016
16
5.2 Connection to a 3(N)AC system/system type 3AC
Position the terminal cover and click it into place.
5.3 Connection to an AC system/system type AC
Position the terminal cover and click it into place.
Risk of injury, fire and damage to property due to a short-
circuit!
According to DIN VDE 0100-430,devices used to protect against a
short-circuit when terminals L1/+, L2 und L3/- are coupled to the IT
system to be monitored can be omitted if the wiring is carried out
in such a manner as to reduce the risk of a short-circuit to a mini-
mum. Ensure short-circuit-proof and earth-fault-proof wiring.
WARNING
L1
L2
L3
N
PE
US
6A
Un
Risk of injury, fire and damage to property due to a short-
circuit!
According to DIN VDE 0100-430,devices used to protect against a
short-circuit when terminals L1/+, L2 und L3/- are coupled to the IT
system to be monitored can be omitted if the wiring is carried out
in such a manner as to reduce the risk of a short-circuit to a mini-
mum. Ensure short-circuit-proof and earth-fault-proof wiring.
WARNING
L1
L2
PE
Un
US
6A
5. Connection5. Connection

iso685-D-B_D00177_01_M_XXEN/01.2016
17
5.4 Connection to a DC system/system type DC
Position the terminal cover and click it into place.
5.5 Connection to the X1 interface
Position the terminal cover and click it into place.
Risk of injury, fire and damage to property due to a short-cir-
cuit!
According to DIN VDE 0100-430,devices used to protect against a
short-circuit when terminals L1/+, L2 und L3/- are coupled to the IT
system to be monitored can be omitted if the wiring is carried out
in such a manner as to reduce the risk of a short-circuit to a mini-
mum. Ensure short-circuit-proof and earth-fault-proof wiring.
WARNING
L+
L-
PE
US
6A **
* F 6A for
systems
> 690 V
overvoltage category III
Un
I1
I2
I3
A
B
M+
Q2
Q1
+
Input 1
Input 2
Input 3
RS-485 A
RS-485 B
Ground
Analogue output
Output 2
Output 1
+ 24 V
Electrical overload protection
Auto shut-off in the event of a short
circuit and transients (resettable)
5. Connection5. Connection

iso685-D-B_D00177_01_M_XXEN/01.2016
18
5.6 Connection to the supply voltage
5.6.1 Connection to A1/+, A2/-
5.6.2 Connection to X1
1
Danger of damage to property due to faulty connections!
The device can be damaged if the unit is simultaneously connected
to the supply voltage via the X1 interface, and A1/+, A2/- terminals.
Do not connect the device simultaneously via X1, and A1/+, A2/- to
different supply voltages.
CAUTION
U
S
6A
External Power supply for powering ISOMETER®s via terminal X1
must fulfil immunity and emission standards of the required appli-
cation. For wiring longer than 1 m the use of a shielded cable is
prescribed.
Danger of damage to property due to faulty connections!
The device can be damaged if the unit is simultaneously connected to
the supply voltage via the X1 interface, and A1/+, A2/- terminals. Do
not connect the device simultaneously via X1, and A1/+, A2/- to differ-
ent supply voltages.
Danger of damage to property due to incorrect nominal
voltage!
When the device is powered via the X1 interface, the nominal volt-
age must be 24 V otherwise the unit may be damaged. kann. Only
connect to a nominal voltage of 24 V to the X1 interface.
CAUTION
CAUTION
+
Us
5. Connection

iso685-D-B_D00177_01_M_XXEN/01.2016
19
5.7 Connection to the Ethernet interface
Position the terminal cover and click it into place.
5.8 Connection to the relay 1 interface (11 12 14)
Position the terminal cover and click it into place.
11
12
14
Relay 1
Common contact
Normally open (n.o)
Normally closed (n.c)
5. Connection

iso685-D-B_D00177_01_M_XXEN/01.2016
20
5.9 Connection to the relay-2 interface (21 22 24)
Position the terminal cover and click it into place
21
22
24
Relay 2
Common contact
Normally closed (n.c)
Normally open (n.o)
6. Commissioning
6.1 Device buttons
You can adjust the device settings in the respective menu using the menu buttons.
Depending on the menu entry, one of the options displayed below are assigned to
the buttons. The individual functions are:
6.2 General initial commissioning process
1. Check that the ISOMETER® iso685-D-B has been properly connected to the
system to be monitored.
2. Connect the supply voltage to the ISOMETER® iso685-D-B. Adjust the device
using the commissioning wizard. Then the ISOMETER® performs a self-test in
four steps, the alarm relays are not checked during this test. After completion
of the test, the measured insulation resistance is shown on the display. If the
value exceeds the response values indicated in the lowest line of the display,
the message "OK" will additionally be displayed.
3. Check the ISOMETER® iso685-D-B in the system being monitored, e.g. using a
suitable resistance against earth.
Observe the device status!
The device is in the alarm state until initial commissioning has
been complete.
Messages
Reset
Show
data value
Up /
Increase value
Back /
Select parameter
Down /
Decrease value
Show
information
Perform
self test
Device menu
start
OK /
Conrm
Forward /
Select parameter
Cancel /
Previous
5. Connection