Connection - Bender ISOMETER isoES425 Manual

Installation, connection and commissioning
3.3

Connection

DANGER
Touching live parts of the system carries the risk of:
• Risk of electrocution due to electric shock
• Damage to the electrical installation
• Destruction of the device
Before installing the device and before working on its connections, make sure that the installation
has been de-energised. The rules for working on electrical systems must be observed.
For details about the conductor cross sections required for wiring, refer to chapter "6 Technical data".
Wiring diagram
E
L1/+ L2/-
L1/+
Test / Reset
ON
T
T/R
T/R
Figure: Wiring diagram
* For UL applications:
Use 60/75 °C copper lines only!
For UL and CSA applications, connect the supply voltage U
16 isoES425_D00214_01_M_XXEN/10.2023
Risk of fatal injury due to electric shock!
U
S
6 A 6 A
KE A1 A2
E KE A1 A2
L2/-
k
AL1 AL2
R MENU
R
24
14 11
on
off
A B
R
K1 K2
14 24 11 A
L1/+
Terminal
L2/-
L3
A1, A2
PE
E, KE
L1/+,
L2/–
T/R
11, 14
11, 24
A, B
COM465IP
B
RS-485
s
Connections
Connection to the supply voltage U
fuse (line protection):
If supplied from an IT system, protect both
lines by a fuse.*
Connect each terminal separately to PE:
Use same wire cross section as for "A1",
"A2".
Connection to the system to be monitored
Connection for the external combined test
and reset button
Connection to alarm relay "K1"
Connection to alarm relay "K2"
RS-485 communication interface with
connectable terminating resistor
Example: Connection of a BMS Ethernet
gateway COM465IP
via 5 A fuses.
via
s