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U
S
A1/+
A2/-
A1/+
A2/-
U
S
X1
A1/+
A2/-
L1/+
X1
A1/+
A2/-
L1/+
U
S
U
S
X1
RS-485
Bus
A1/+
A2/-
L1/+
A1/+
A2/-
L1/+
I1 I2
I3
A1/+
A2/-
L1/+
A1/+
A2/-
L1/+
+
Q1 Q2 M+
U
S
X1
ETH
X1
ETH
A1/+
A2/-
L1/+
A1/+
A2/-
L1/+
X1
ETH
X1
ETH
X1
ETH
X1
ETH
X1
ETH
X1
ETH
L1/+
L2
L3/-
L1/+
L2
L3/-
11 12 14
ETH
R
L2
L3/-
KE
E
ETH
R
11
12
14
L2
L3/-
KE E
RS-485
Bus
L2
L3/-
KE
E
L2
L3/-
KE
E
A B
L2
L3/-
KE E
Deactiv.
RESET
L2
L3/-
KE E
Device
low active
11 12 14
21 22 24
R
Currentmeter
A
R
11
12
14
21
22
24
Voltagemeter
V
L2
L3/-
KE
E
active
L2
L3/-
KE E
11 12 14
21 22 24
R
11 12 14
21 22 24
R
R
11
12
14
21
22
24
R
11
12
14
21
22
24
11 12 14
21 22 24
R
R
11
12
14
21
22
24
L1
L2
L3
N
PE
Wiring diagram
Legend to terminal diagrams
Terminal
KE
E
A1/+ A2/- ** Power supply,
KE E
L1/+, L2, L3/- Connections to the system to be monitored
L1
KE E
L2
I1...I3 (X1)
L3
N
PE
A, B (X1)
+ (X1)
L1
21 22 24
L1
L2
L2
L3
L3
21
22
24
N
N
PE
PE
Q1, Q2 (X1)
TEST
M+ (X1)
L1
L2
L3
GND (X1)
high active
N
RJ45 (ETH)
PE
R
11 12 14
21 22 24
i
isoHR685W-x-I-B_D00261_05_Q_DEEN/12.2021
ISOMETER® isoHR685W-x-I-B
Connections
U
= 24...240V (50...400 Hz)
s
AC 0...1000 V, 3AC 0...690 V
DC 0...1300 V
AC/DC 0...1000 V for UL applications
Connection to ground
Configurable digital inputs (e.g. Test,
Reset,...)
Serial interface RS-485 (BS bus)
Supply voltage of the inputs and outputs
I, Q and M.
Electrical overload protection.
Automatic shutdown in the event of a short
circuit and transient (resettable).
If the supply is via an external 24 V source,
then A1/+, A2/- must not be connected.
Configurable digital output
Configurable analogue output (e.g. measu-
ring instrument)
Reference potential ground
Ethernet connector, webserver, modbus, IP
Termination for the BS bus
Relay 1
Relay 2
** Provide line protection! According to DIN
VDE 0100-430, a line protection shall be provi-
ded for the supply voltage
5
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