Bender ISOMETER iso685-D-P User manual

Manual
EN
iso685-x-P_D00170_05_M_XXEN/05.2018
Insulation Monitoring Device
with integrated locating current injector
for IT AC systems with galvanically connected
rectifiers and inverters and for IT DC systems
ISOMETER®
iso685–D–P
iso685W–D–P
iso685–S–P
iso685W–S–P

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.

Table of contents
3iso685-x-P_D00170_04_M_XXEN/01.2018
1. Important information .................................................................... 7
1.1 How to use this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.1 End customer support and advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.2 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.3 Customer service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Training courses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4 Delivery conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2. Safety instructions ............................................................................ 9
2.1 General safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Work activities on electrical installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Device-specific safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Function ........................................................................................... 11
3.1 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.1 Features EDS44x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.1 General product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.2 Special ISOMETER® characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Function description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4 Insulation fault location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.5 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.6 Self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.7 Compatibility with EDS devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4. Device overview .............................................................................. 15
4.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Device variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Connections and panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 Display elements and device buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.1 Display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.2 Device buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5 Operation and Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.1 Menu selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.2 Selecting from a list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.3 Parameter selection and value setting . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.4 Character input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.5 Multiple selection in the device menu . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5. Mounting ..........................................................................................19
5.1 General instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
5.2 Screw mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
5.3 DIN rail mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
6. Connection .......................................................................................21
6.1 Connection requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6.2 Connection to a 3(N)AC system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
6.3 Connection to an AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
6.4 Connection to a DC system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.5 Connection to the supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.6 Connection to the X1 inteface1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.7 Connection to the Ethernet interface ETH. . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.8 Connection to relay interfaces 1 and 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.9 Position the terminal covers and click it into place . . . . . . . . . . . . . . . . . .24
6.10 Connection to the BB bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6.11 Connecting the EDS to the ISOMETER® . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6.11.1 Connection example ISOMETER® to EDS . . . . . . . . . . . . . . . . . . . . . . .26
6.11.2 Connection to a 3(N)AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6.11.3 Connection to an AC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
6.11.4 Connection to a DC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
6.11.5 System structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
7. Commissioning ...............................................................................31
7.1 General initial commissioning process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
7.2 Commissioning procedure - steps for commissioning . . . . . . . . . . . . . . .31
7.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7.3.1 Set language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7.3.2 Set time and date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7.3.3 Set system type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7.3.4 Set profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7.3.5 Setting EDS mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7.3.6 Setting EDS current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.3.7 Set response value Ran1 for Alarm 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.3.8 Set response value Ran2 for Alarm 2 . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.4 Commissioning EDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.5 Recommissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table of contents
4iso685-x-P_D00170_04_M_XXEN/01.2018
8. Display .............................................................................................. 35
8.1 Standarddisplay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.2 Fault display (active) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.3 Fault display (inactive) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.4 Acknowledging a fault message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.5 Data-isoGraph. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.6 History memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.7 Initial measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.8 ISOnet mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.9 Automatic test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.10 Isolationsfehlersuche . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9. Menu structure ................................................................................ 41
10. Settings .......................................................................................... 43
10.1 Settings in the device menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.0) Alarm settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.1) Insulation alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.1.1) Alarm 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.1.2) Alarm 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.1.3) Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.2) DC alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.2.1) Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.2.2) U(DC-E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.1 (1.3) Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.4) System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.5) ISONet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.5.1) ISOnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.5.2) Number of devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.6) Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.7) t(Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.8) Coupling monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.9) Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.9.1) Digital 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.9.1.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 (1.9.1.2) t(on) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10.1 (1.9.1.3) t(off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10.1 (1.9.1.4) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10.1 (1.9.2) Digital 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10.1 (1.9.3) Digital 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10.1 (1.10) Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.1 (1.10.1) Relay 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10.1 (1.10.1.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.1 (1.10.1.2) Relay mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.1 (1.10.1.3) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
10.1 (1.10.1.4) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.1 (1.10.1.5) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.1 (1.10.2) Relay 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.1 (1.10.3) Digital 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.1 (1.10.3.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.1 (1.10.3.2) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.1 (1.10.3.3) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.1 (1.10.3.4) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.1 (1.10.3.5) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10.1 (1.10.4) Digital 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.1 (1.10.5) Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.1 (1.10.5.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (1.10.5.2) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (1.10.5.3) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (1.10.5.4) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (1.10.6) Analogue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10.1 (1.10.6.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (1.10.6.2) Midscale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (1.10.6.3) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (1.10.6.4) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
10.1 (2.0) EDS (insulation fault location) . . . . . . . . . . . . . . . . . . . . . . . . . . .49
10.1 (2.1) General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
10.1 (2.1.1) Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
10.1 (2.1.2) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
10.1 (2.1.3) Using a portable EDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
10.1 (2.2) Scanning channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
10.1 (2.3) Activating channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
10.1 (2.4) Group settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
10.1 (2.4.1) Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
10.1 (2.4.1.1) Current transformer (CT) . . . . . . . . . . . . . . . . . . . . . . . .50
10.1 (2.4.1.2) CT monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
10.1 (2.4.1.3) I∆L Response value . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
10.1 (2.4.1.4) I∆n Response value . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Table of contents
5iso685-x-P_D00170_04_M_XXEN/01.2018
10.1 (2.4.2) Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
10.1 (2.4.2.1) Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
10.1 (2.4.2.2) Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 (2.4.2.3) Digital output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 (2.4.2.4) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 (2.4.2.5) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 (2.4.2.6) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 (2.4.3) Dig. input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 (2.4.3.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.3.2) t(on) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.3.3) t(off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.3.4) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.4) Device settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.4.1) System type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.4.2) Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.4.3) Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.4.4.4) Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10.1 (2.5) Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.5.1) Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.5.2) Current transformer monitoring . . . . . . . . . . . . . . . . . . . 54
10.1 (2.5.3) Response value I∆L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.5.4) Response value I∆n. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6) Outputs 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
10.1 (2.6.1) Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.1.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.1.2) Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.1.3) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.1.4) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.1.5) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.2) Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.2.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.2.2) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.2.3) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.2.4) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.3) Digital output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.3.1) TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.3.2) Function 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.3.3) Function 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.6.3.4) Function 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.7) Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
10.1 (2.7.1) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10.1 (2.7.2) t(on) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (2.7.3) t(off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (2.7.4) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (2.8) Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
10.1 (2.8.1) Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (2.8.2) Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (2.9) Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
10.1 (3.0) Data measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
10.1 (4.0) Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
10.1 (5.0) History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
10.1 (6.0) Device settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
10.1 (6.1) Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
10.1 (6.2) Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (6.2.1) Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (6.2.2) Format (time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1 (6.2.3) Summertime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.2.4) Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.2.5) Format (date) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.2.6) NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.2.7) NTP server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.2.8) UTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.3) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
10.1 (6.3.1) Write access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.3.2) Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.3.2.1) DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
10.1 (6.3.2.2) IP (manual configuration). . . . . . . . . . . . . . . . . . . . . . . 56
10.1 (6.3.2.3) SN (manual configuration) . . . . . . . . . . . . . . . . . . . . . .56
10.1 (6.3.2.4) Std. GW (manual configuration) . . . . . . . . . . . . . . . . .57
10.1 (6.3.2.5) DNS server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
10.1 (6.3.2.6) Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
10.1 (6.3.3) BCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.3.3.1) System name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
10.1 (6.3.3.2) Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
10.1 (6.3.3.3) Device address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
10.1 (6.3.3.4) Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
10.1 (6.3.3.5) TTL for subscription . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Table of contents
6iso685-x-P_D00170_04_M_XXEN/01.2018
10.1 (6.3.4) Modbus/TCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.3.4.1) Port 502 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.3.5) BS-Bus / RS-485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.3.5.1) Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.4) Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.4.1) Brightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.5) Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.5.1) Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.1 (6.5.2) Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.1 (6.6) Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.1 (6.7) Data backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.1 (6.8) Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.1 (7.0) Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
11. Device communication ............................................................... 59
11.1 Ethernet interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.2 BCOM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.3 Modbus/TCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.4 Web server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.4.1 Web server user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
11.4.2 Web server device menu (first level) . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
11.4.3 Webserver submenu tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
11.5 BS bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11.5.1 Master-slave principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11.5.2 Addresses and address ranges on the BS bus . . . . . . . . . . . . . . . . . . 61
11.5.3 RS-485 specifications/cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11.5.4 Cable routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
12. Device profiles .............................................................................. 62
13. Special functions for coupled IT systems ................................. 63
13.1 Particularities when monitoring coupled IT systems . . . . . . . . . . . . . . . 63
13.2 System isolation via digital input with two coupled systems . . . . . . . 63
13.3 System separation via ISOnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
13.3.1 System structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
13.3.2 Configuration and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
14. Insulation fault location ..............................................................66
14.1 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
14.2 Required settings for insulation fault location . . . . . . . . . . . . . . . . . . . . .66
14.3 Indication on the display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
14.4 Starting and stopping the insulation fault location. . . . . . . . . . . . . . . . .66
15. Diagrams ........................................................................................67
15.1 Response time profile power circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
15.2 Response time profile control circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
15.3 Response time profile generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
15.4 Response time profile high capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . .67
15.5 Response time profile inverter > 10 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
15.6 Response time profile inverter < 10 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
15.7 Response time DC Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
15.8 Operating uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
16. Alarm messages ............................................................................69
16.1 Alarm messages of the ISOMETER® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
16.2 Alarm messages of the EDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
17. Factory settings ............................................................................71
18. Technical data ...............................................................................72
18.1 Tabular data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
18.2 Device feature W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
18.3 Standards and certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
18.4 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
18.4.1 Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
18.4.2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
18.4.3 Insulation fault locators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
18.4.4 Suitable system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
19. Glossary ..........................................................................................76
Index ...............................................................................................77

iso685-x-P_D00170_05_M_XXEN/05.2018
7
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: [e-mail]
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
iso685-x-P_D00170_05_M_XXEN/05.2018
8
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.

iso685-x-P_D00170_05_M_XXEN/05.2018
9
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 instructions
Only qualified personnel are permitted to carry out the work necessary
to install, commission and run a device or system.
DANGER
Danger of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
• A life threatening electric shock
• Damage to the electrical installation
• Destruction of the device
Before installing and connecting the device, make sure that the
installation has been de-energised. Observe the rules for working on
electrical installations.
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 that the de-
vice has been correctly connected, a functional test must be carried out be-
fore starting the system.
In the event of an alarm message of the ISOMETER®, the insulation fault
should be eliminated as quickly as possible.
If the ISOMETER® is installed inside a control cabinet, the insulation fault
message must be audible and/or visible to attract attention.
When using ISOMETER®s in IT systems, make sure that only ONE active
ISOMETER® is connected in each galvanically interconnected system. If IT
systems are interconnected via coupling switches, make sure that ISOME-
TER®s not currently used are disconnected from the IT system and deacti-
vated. IT systems coupled via diodes or capacitances may also influence
the insulation monitoring process so that a central control of the different
ISOMETER®s is required.
Prevent measurement errors!
When a monitored IT system contains galvanically coupled DC circuits, an
insulation fault can only be detected correctly if the rectifier valves (e.g.
rectifier diode, thyristors, IGBTs, frequency inverters, …) carry a minimum
current of > 10 mA.
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 profile, 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).

Safety instructionsSafety instructions
iso685-x-P_D00170_05_M_XXEN/05.2018
10
2.4 Intended use
The ISOMETER® iso685–x–P 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 operating
range of the nominal voltage Uncan be extended via coupling devices.
DC components existing in AC/DC systems do not influence the operating characteristics.
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.
Intended use also implies:
• Observation of all information in the operating manual
• Compliance with test intervals
In order to meet the requirements of applicable standards, customised parameter set-
tings must be made on the equipment in order to adapt it to local equipment and oper-
ating conditions. Please heed the limits of the range of application indicated in the
technical data.
Any use other than that described in this manual is regarded as improper.
Only qualified personnel are permitted to carry out the work necessary
to install, commission and run a device or system.
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.

iso685-x-P_D00170_05_M_XXEN/05.2018
11
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
• Current or voltage output 0(4)…20 mA, 0…400 A, 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 the Internet (made available by Bender Service
only)
• RS-485/BS (Bender sensor bus) for data exchange with other Bender devices
• ISOnet: Internal separation of the ISOMETER® from the IT system to be monitored
(e.g. if several IT systems are interconnected)
• BCOM, Modbus TCP and web server
• 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
3.1.1 Features EDS44x
• Insulation fault location in AC, 3AC and DC IT systems
• Up to 12 measuring current transformers of the W…, WR…, WS… measuring cur-
rent transformer series can be connected
• Response sensitivity insulation fault location:
EDS440 2…10 mA
EDS441 0.2…1 mA
• Response sensitivity residual current measurement:
EDS440 100 mA…10 A
EDS441 100 mA…1 A
Communication of the components via BS bus (RS-485) or BB bus
3.2 Product description
3.2.1 General product description
The ISOMETER® is an insulation monitoring device for IT systems in accordance with
IEC 61557-8.
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).
3.2.2 Special ISOMETER® characteristics
The ISOMETER® iso685–D–P belongs to the iso685 device family and features an integrat-
ed display. This manual applies in full to this ISOMETER®.
The ISOMETER® iso685–S–P is the sensor variant from the iso685 device family. The only
difference between this variant and the ISOMETER® isoHR685-D-B is that it does not have
a display. The ISOMETER® iso685–S–P must be used in combination with a front panel
through which it is operated. The operation of the front panel is equal to the operation of
the ISOMETER® with an integrated display, which is described in this manual.
Hereafter, the ISOMETER®s with integrated display are described. This description is sim-
ilar to the combination of ISOMETER® sensor variants and the front panel FP200. The
devices to which this manual applies will be referred to as ISOMETER®s hereafter.
Only the sensor variant (i.e. ISOMETER® iso685–S–P) can be connected to
the front panel. Connection to the display variant (i.e ISOMETER® iso685–
D–P) is not possible.

FunctionFunction
iso685-x-P_D00170_05_M_XXEN/05.2018
12
3.3 Function description
The insulation monitoring device continuously monitors the entire insulation resistance
of an IT system during operation and triggers an alarm when the value falls below a pre-
set response value. To obtain a measurement the device has to be connected between
the IT system (unearthed system) and the protective earth conductor (PE). A measuring
current in the A range is superimposed onto the system which is recorded and evaluat-
ed by a microprocessor-controlled measuring circuit. The measuring time is dependent
on the selected measurement profiles, the system leakage capacitance, the insulation re-
sistance and possible system-related disturbances.
The response values and other parameters are set using a commissioning wizard as well
as 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 lan-
guages can be selected for the setup menus as well as the messages indicated on the dis-
play. The device utilises a clock for storing fault messages and events in a history memory
with time and date stamp. The settings can be password protected to prevent unauthor-
ised changes.
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/-.
The insulation monitoring device iso685–x–P is able to measure the insulation resistance
reliably and precisely in all common IT systems (unearthed systems). Due to various ap-
plications, system types, operating conditions, application of variable-speed drives, high
system leakage capacitances etc., the measurement technique must be able to meet var-
ying requirements inorder toensure an optimised response time and relative uncertain-
ty. Therefore different measuring profiles can be selected with which the device can
optimally adjusted.
If the preset response value falls below the value of Alarm 1 and/or Alarm 2, the associat-
ed alarm relays switch, the LEDs ALARM 1 or ALARM 2 light and the measured 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 activated, the fault message
will be stored. Pressing the RESET button resets the insulation fault message, provided
that the current insulation resistance displayed at the time of resetting is at least 25 %
above the actual 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 ISOMETER® has an internal system isolating switch, which makes it possible to oper-
ate several ISOMETER®s in coupled IT systems. For this purpose, the ISOMETER®s are con-
nected via an Ethernet bus. The integrated ISOnet function ensures that only one
ISOMETER® is actively measuring at a time, while the other devices arecompletely isolat-
ed from the system and waiting in standby mode for measuring permission.

FunctionFunction
iso685-x-P_D00170_05_M_XXEN/05.2018
13
3.4 Insulation fault location
An additional function of the ISOMETER® in combination with the EDS is the selective in-
sulation fault location. Therefore, the ISOMETER® generates a periodic locating current af-
ter the values has fallen below the set response value Ran2 (LED ALARM 2). Thereby, the
system conductors are alternately connected to earth via a defined resistance. The resul-
ting locating current depends on the size of the existing insulation fault and the system
voltage. It is limited by the ISOMETER® depending on the settings. The insulation fault is
selectively located by means of the EDS and the measuring current transformer con-
nected to it. The locating current flows from the locating current injector via the live lines
to the insulation fault position taking the shortest way. From there, it flows through the
insulation fault and the conductor PE back to the ISOMETER®. This locating current pulse
is detected by the measuring current transformer on the insulation fault path and si-
gnalled by the connected EDS.
For the duration of the insulation fault location, the function of the insulation monitoring
device is deactivated. If during the insulation fault location the locating current falls
below the value measurable by the EDS, the insulation fault location is ended by the
ISOMETER®.
3.5 Interfaces
• Communication protocol Modbus TCP
• BCOM for Bender device communication via Ethernet
• BS bus for communication of Bender devices (RS-485)
•BB bus for communication of Bender devices (Bender-internal device bus)
• Integrated web server for reading out measured values and for parameter setting
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.
3.6 Self test
After switching on the supply voltage, the ISOMETER, by means of the self-test functions,
automatically and continuously checks all internal measuring functions, the components
of the process control, such as the data and parameter memory, as well as the
connections to the IT system and earth.
The self test can also be activated manually by means of the test button to check the func-
tions of the relays (depending on the configuration) or it can be selected via the "Control"
menu (refer to “Control” on page 55).
The progress of the manual self test is shown on the LC display by a bar graph. Depending
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. measurement mode) and the
actual measured value will be displayed afterthe measuring time has expired. The display
shows the message
Initial measurement until the first valid value is measured (refer to
“Initial measurement” on page 39).
If a fault is detected during the self test, the respective LEDs of the device light (refer to
“Alarm messages” on page 69). In addition, the respective message will be indicated on
the display and a previously programmed output will provide the respective signal.
√
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

FunctionFunction
iso685-x-P_D00170_05_M_XXEN/05.2018
14
3.7 Compatibility with EDS devices
Full compatibility, communication with ISOMETER® via BS bus
Full compatibility, communication with ISOMETER® via BB bus
Full compatibility, no communication with ISOMETER®
Device Notes
EDS440-L EDS440-L
EDS440W-L
B91080202
B91080202W
EDS441-L EDS441-L
EDS441W-L
B91080205
B91080205W
EDS441-LAB EDS441-LAB
EDS441W-LAB
B91080207
B91080207W
EDS460/490L Not recommended for new systems
EDS460/490D Not recommended for new systems
EDS461/491L Not recommended for new systems
EDS461/491D Not recommended for new systems
Device Notes
EDS440-S EDS440-S
EDS440W-S
B91080201
B91080201W
EDS441-S EDS441-S
EDS441W-S
B91080204
B91080204W
Device Notes
EDS195P EDS195P B91082040

iso685-x-P_D00170_05_M_XXEN/05.2018
15
Device overview
4. Device overview
4.1 Dimensions
Dimensions in mm.
93
108
110
4.2 Device variants
iso685–D–P The device version iso685–D–P features a high-resolution graphical LC dis-
play and control elements for direct operation of the device functions. It
cannot be combined with an FP200.
iso685–S–P The device variant ISOMETER® iso685–S–P features neither a display nor
operating controls. It can only be used in combination with the FP200
and it is operated via this front panel.

Device overview
iso685-x-P_D00170_05_M_XXEN/05.2018
16
4.3 Connections and panel
11 12 13 14
10
10 A1/+, A2/- Connection to the power supply Us
11 L1/+ Connection to the IT system to be monitored
12 L2 Connection to the IT system to be monitored
13 L3/- Connection to the IT system to be monitored
14 KE, E Connection to PE
Top
5050505050505050505050
PGH ON
REMOTE
20
PGH ON
iso685–D–P
20 X4 REMOTE interface to connect to the FP200(W) *
50 X3 Optional expansion module (BB-Bus) for Bender devices (e.g. BB Bus)
iso685–S–P
RearFront
Panel
Connection Top
Connection
bottom
242221141211RETHX1
1918
1716
15
15 X1 Multifunctional I/O interface (refer to Page 24)
16 ETH (X2) Ethernet interface
17 R Switchable terminating resistor for termination of the RS-485 interface
18 11 12 14 Connector for alarm relay 1
19 21 22 24 Connector for alarm relay 2
* The connection between the iso685 device and an FP200 (W) may only be
established when the device is switched off and de-energized.
Bottom

Device overviewDevice overview
iso685-x-P_D00170_05_M_XXEN/05.2018
17
4.4 Display elements and device buttons
4.4.1 Display elements
1 ON The LED "ON" lights when the device is turned on.
2PGHON
The LED "PGH ON" flashes during insulation fault location. It indicates that
the locating current for the insulation fault location is generated.
3 SERVICE The LED "SERVICE" lights when there is either a device fault or a connection
fault, or when the device is in maintenance mode.
4 ALARM 1 The LED "ALARM 1" lights when the insulation resistance of the IT system
falls below the set response value Ran1.
5 ALARM 2 The LED "ALARM 2" lights when the insulation resistance of the IT system
falls below the set response value Ran2.
6Display
The device display shows information regarding the device and the meas-
urements.
Further information is available in the chapter“Display” from page 36.
1
3
4
5
6
78
910
11 12
PGH ON
2
4.4.2 Device buttons
The device settings can be adjusted 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.
7EDS Manually starts the insulation fault location, which runs continuously.
Stops the insulation fault location immediately when it is pressed again
Navigates up in a list or increases a value.
8
MENU Opens the device menu.
ESC Cancels the current process or
navigates one step back in the device menu.
9
RESET Resets alarms.
Navigates backwards (e.g. to the previous setting step) or
selects a parameter.
10
TEST Starts the device self test.
Navigates forwards (e.g. to the next setting step) or
selects a parameter.
11 DATA Indicates data and values.
Navigates down in a list or reduces a value.
12 INFO Shows information.
OK Confirms an action or a selection.

Device overviewDevice overview
iso685-x-P_D00170_05_M_XXEN/05.2018
18
4.5 Operation and Navigation
4.5.1 Menu selection
4.5.2 Selecting from a list
4.5.3 Parameter selection and value setting
The menu is activated with the
"Menu" button
IT system
OK
230 k
Ω
R(on) 40k Ω /10k Ω
Commissioning 5.6
Please set the
current date and
time
2/10
To select a value in a given list (Menu), nav-
igate with the button. Press "ESC" to
exit to the respective menu level.
Information about the device menu can be
found in the chapter entitled “” on page 42.
To select a value in a given list (Menu), nav-
igate with the and buttons. The cur-
rent value is indicated by a black menu
point.Confirm the selection with the "OK"
button. To exit the list, press the "ESC" but-
ton.
System type 5.6.6
• DC
O AC
O 3AC
Date 5.6.4
28.07.2016
Min. 1
Max. 12
The parameters are selected using the
and buttons.The current parameter is
indicated by the symbols. Values can be
changed with the and buttons. Con-
firm the text input with the "OK" button. To
exit text input, press "ESC".
4.5.4 Character input
4.5.5 Multiple selection in the device menu
Ethernet 6.3.2
192.
-.0123456789abcdef
ghijklmnopqrstuvwx
yz del
Select the required character with the
button (forwards) and the button (back-
wards). To enter the next character, use the
button to select the next position.
To delete a character that has been en-
tered, use the and buttons to navi-
gate to the character to be deleted and
then select "del" using the and but-
tons.
Confirm the entered text with "OK". Press
"ESC" to exit character input.
Activating Ch. 2.3
Select all
No selection
Invert selection
Channel 1 (BS 2/1)
Channel 2 (BS 2/2)
Select 1..n selection points using the
and buttons. Each selection in the List
must be confirmed with „OK“.
If you have made your selection, there are
two options depending on the menu-item:
• Navigating to the settings for the
selection usingr .
•Initiating the respective action (e.g.
activate selected channels) using .

iso685-x-P_D00170_05_M_XXEN/05.2018
19
Mounting
5. Mounting
5.1 General instructions
Only qualified personnel are permitted to carry out the work necessary
to install, commission and run a device or system.
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
Danger of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
• A life threatening electric shock
• Damage to the electrical installation
• Destruction of the device
Before installing and connecting the device, make sure that the
installation has been de-energised. Observe the rules for working on
electrical installations.

MountingMounting
iso685-x-P_D00170_05_M_XXEN/05.2018
20
5.2 Screw 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. Drill the mounting holes for the M4 thread according to the drilling template.
3. Fix the ISOMETER® using three M4 screws.
Dimensions in mm.
108
107,3
100
72
54
Ø M4
5.3 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. Mount the ISOMETER® onto the DIN rail.
3. Fix the ISOMETER® onto the DIN rail by pressing the mounting clips until they snap
into place
Dimensions in mm.
Mounting clips:
The installation of a third mounting clip is only required for "W variants".
108
54
18