Connection To A Dc System; Connection To The Supply Voltage - Bender ISOMETER isoRW685W Manual

Connection

6.4 Connection to a DC system

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
WARNING to be monitored can be omitted if the wiring is designed in such a manner
that the risk of a short circuit is reduced to a minimum. Ensure short-cir-
cuit-proof and earth-fault-proof wiring.
U
n
U
S
*
A1/+ A2/– L1/+
A1/+ A2/- L1/+
In systems with a nominal system voltage of more than 690 V and with ov-
ervoltage category III, a fuse for the connection to the system to be moni-
tored must be provided. * 2A fuses recommended.
19
L+
L−
*
*
U > 690 V
n
=> F 2A
L3/- KE E
L2 L3/- KE E
Connection

6.5 Connection to the supply voltage

Danger of damage to property due to faulty connections!
The device may be damaged if it is simultaneously connected to the sup-
ply voltage via the "X1" interface and via "A1/+" and "A2/-".
CAUTION Do not connect the device simultaneously via "A1/+", "A2/-" and "X1" to
different supply voltage sources.
Supply via external voltage sources
In case of external supply (24 V) the device can be supplied via "A1+"/"A2"
– OR via "X1". In case of supply via "A1+"/"A2", make sure that +24 V are
applied to "A1/+" and that "A2/-" is connected to "GND" (ground).
External power supply units for voltage supply of the ISOMETER® via ter-
minal X1 must meet the immunity and emission requirements of the rele-
vant application standard. For connecting cables longer than 1 m,
shielded cables must be used.
U
S
A1/+ A2/–
A1/+ A2/- L1/+ L2 L3/- KE E
isoRW685W-D_D00178_04_M_XXEN/02.2019