Isometer® iso685-d-p iso685W-d-p iso685-s-p iso685w-s-p insulation Monitoring Device with integrated locating current injector for it ac systems with galvanically connected rectifiers and inverters and for it dc systems

Connection
iso685-D-P_D00170_03_M_XXEN/07.2017
29
 6.11.2 Connection to a 3(N)AC system
BS-Bus
PGH ON
IT-System
O
K
R(an) 40kΩ/10kΩ
O
K
>20
MΩ
>20
MΩ
L1
L2
L3
N
PE
U
S
U
n
to the loads
to the loads
A1/+ A2/-
L1/+
L3/-
L2
KE E
X1
ISOSCAN®
EDS440
I
L
7 6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
EDS440
ISOSCAN®
TEST
MUTE
RESET
ALARM 
ALARM 
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11
10
9
8
7
1
2
3
4
5
6
1
7
I
L
I
n
I
∆
L
I
∆
n
A1/+ A2/-
l
k
1 2 3 4 5 6 7 8 9 10 11 12
13 14
23 24
X1
U
S
A1 A2
l l
X1

Connection
iso685-D-P_D00170_03_M_XXEN/07.2017
30
 6.11.3 Connection to an AC system
BS-Bus
IT-System
O
K
R(an) 40kΩ/10kΩ
O
K
>20
MΩ
>20
MΩ
L1
L2
PE
U
S
U
n
to the loads
to the loads
PGH ON
A1/+ A2/-
L1/+
L3/-
L2
KE E
X1
ISOSCAN®
EDS440
I
L
7 6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
EDS440
ISOSCAN®
TEST
MUTE
RESET
ALARM 
ALARM
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11
10
9
8
7
1
2
3
4
5
6
1
7
I
L
I
n
I
∆
L
I
∆
n
l l
X1
13 14
23 24
X1
A1/+ A2/-
l
k
1 2 3 4 5 6 7 8 9 10 11 12
U
S
A1 A2

Connection
iso685-D-P_D00170_03_M_XXEN/07.2017
31
 6.11.4 Connection to a DC system
For systems > 690 V and with overvoltage category III a fuse for the connection to the system to be monitored must be provided. 
Recommendation: 2A screw fuses.
BS-Bus
IT-System
O
K
R(an) 40kΩ/10kΩ
O
K
>20
MΩ
>20
MΩ
L+
L-
PE
U
S
U
n
to the loads
to the loads
A1/+ A2/-
L1/+
L3/-
L2
KE E
X1
ISOSCAN®
EDS440
I
L
7 6
5
3
8
4
2
0
1
6
5
3
4
2
0
1
9
8
EDS440
ISOSCAN®
TEST
MUTE
RESET
ALARM
ALARM 
ON
COM
SERVICE
CHANNELS
SLAVE ADDRESS
12
11
10
9
8
7
1
2
3
4
5
6
1
7
I
L
I
n
I
∆
L
I
∆
n
l l
X1
A1/+ A2/-
l
k
1 2 3 4 5 6 7 8 9 10 11 12
13 14
23 24
X1
U
S
A1 A2
PGH ON

Connection
iso685-D-P_D00170_03_M_XXEN/07.2017
32
 6.11.5 System structure
The application example below shows the monitoring of a control system with the ISOMETER® iso685-D-P and the EDS441-S.
PGH ON
IT-System
O
K
R(an) 40kΩ/10kΩ
O
K
>20
MΩ
>20
MΩ
A1/+ A2/-
L1/+
L3/-
L2
KE E
X1
ISOSCAN®
EDS440
EDS441
ISOSCAN®
I
L
I
n
ON
PLC
Input Output
VFD
AC 24 V 
DC 110 V
L1
L2
PE
U
S
U
n
M

iso685-D-P_D00170_03_M_XXEN/07.2017
33
Commissioning
7. Commissioning
7.1 General initial commissioning process
1. Check that the ISOMETER® is properly connected to the system to be monitored.
2. Connect the supply voltage to the ISOMETER®. Adjust the device using the commis-
sioning wizard. Afterwards, the ISOMETER® performs a self test in four steps. The 
alarm relays are not checked during this test. After completion of the test, the meas-
ured 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® in the system being monitored, e.g. using a suitable resistance 
to earth.
After setting the response value R
an2
for alarm 2, the device starts a self test, makes the 
first measurement and outputs the measured insulation resistance values of the IT sys-
tem being monitored, then commissioning is completed.
For customer-specific configured devices, the commissioning wizard
might be deactivated and cannot be run. In this case, the device is preset.
However, the commissioning wizard can be started as described at
“Recommissioning” on page 35
.
Observe device status!
The device is in an alarm state until initial commissioning has been
completed.
Commissioning flow chart
Commissioning the ISOMETER
®
Adjust basic settings if 
necessary
Control and/or connect the EDS 
to the ISOMETER
®
:
* EDS44…-L: use BS bus
* EDS44…-S: use BB-Bus
Make any other necessary 
settings for the EDS44… in the 
ISOMETER
®
menu: EDS 
Set the maximum locating current 
in the ISOMETER
® 
menu: 
EDS  General Current
* EDS440…: 10…50 mA
* EDS441…: 1…5 mA
Install the device according to the 
wiring diagram 
and documentation
Connect the supply voltage
Connect the system voltage
The ISOMETER
®
performs a self 
test
Function test with a suitable 
resistance between system and 
earth. Resistance value: 50% of 
the response value Alarm 2
Remove the resistance
The ISOMETER
®
is properly 
connected and 
functions reliably
Commissioning the EDS44…
Function test with a suitable 
resistance between system and 
earth. Resistance value: 50% of 
the response value Alarm 2
Remove the resistance
The ISOMETER
®
and EDS44... 
combination is properly connected 
and functions reliably
Set BS address = 1 (Master) 
System commissioning of
ISOMETER
®
 with EDS44…
Install the device according to the 
wiring diagram and documentation
Connect the supply voltage
Delete the alarm messages as 
described in the device 
documentation 
The EDS44… is properly 
connected and ready for operation
Disconnect supply voltage 
of all devices
Connect the supply voltage 
to all devices
Search for adjustable measuring 
channels in the ISOMETER
® 
menu: EDS  Scan for channels
Activate measuring channels in 
ISOMETER
® 
menu:
EDS Enable channel
Run the commissioning 
wizard
The ON LED flashes until the 
device is ready for use
Set EDS mode in the ISOMETER
®

menu: EDS General

Mode 
EDS44…-L:
Set the BS adress using
the rotary switches on the EDS
For further information regarding de-
vice settings, refer to chapter 
“Settings” 
from page 46
.

Commissioning
Commissioning
iso685-D-P_D00170_03_M_XXEN/07.2017
34
7.2 Initial commissioning
Follow the instructions of the commissioning wizard on the display.
 7.2.1 Set language
The language selected here will be used in the menu and for device messages.
 7.2.2 Set time and date
Alarm messages in the history memory and the insulation resistance value over time can 
only be assigned correctly to the isoGraph when the date and time are set correctly.
Check network function!
When the device has been integrated into a network, the influence on the
network has to be checked with the device switched on and off.
Language
6.6.2
• Deutsch
o English
o ...
6.6.4
14.01.2014
31
Date
min.
1
max. 
31
lle
Commissioning 6.6
2/9
Please set the
current date
and time. 
 7.2.3 Setting system type
By setting the system type the insulation monitoring device can be optimally adapted to 
the system to be monitored. The system type is essential information for the insulation 
monitoring device in order to determine the insulation resistance correctly.
 7.2.4 Set profile
In order to optimally adapt the insulation monitoring device to the system to be moni-
tored, select a profile here that suits your system. For an overview of the profiles refer to 
“Device profiles” on page 74
. The profile "Power circuits" is suitable for most IT systems.
 7.2.5 Setting EDS mode
Set the mode for the insulation fault location to manual, automatic or 1 cycle. 
For further information, refer to 
“Mode” on page 54
.
6.6.6
• DC
o AC
o 3AC
System type
lle
6.6
5/11
Commissioning
Please choose the 
type of system 
that best suits 
your installation.
6.6.7
Profile
• Power circuits
o Control circuits
o Generator
o High capacitance
o Inverter>10 Hz
o Inverter<10 Hz
lle
6.6
6/11
Commissioning
Please select a 
profile that suits 
your application. 
Mode
• 
manual
o 
auto
o 
1 cycle
6.6.8
lle
Commissioning 6.6
Please select the 
EDS mode. 
7/11

Commissioning
Commissioning
iso685-D-P_D00170_03_M_XXEN/07.2017
35
 7.2.6 Setting EDS current
Set the maximum locating current. 
EDS441: 1-5 mA
EDS440: 10-50 mA 
For further information, refer to 
“Current” on page 53
.

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