Wiring Diagram; Alarm Output - nVent RAYCHEM VIA-DU-20 Mode D'emploi

9. WIRING DIAGRAM

EN
9.1 VIA-DU-20 with contactor
DE
L1
FR
L2
L3
IT
N
PE
RU
30 mA
**
heating of
open space
When using MI heating cables a 300 mA
RCD should be used.
* L ocal values, standards and rules require two- or
four-pole switching using a electrical protection
** Depending on the application, both one- and three-
pole circuit breakers of contactors are possible.
9.2 Alarm output
Alarm 2(1)A
L
N
PE
|
14 nVent.com/RAYCHEM
*
Contactor
Connection of an
alarm lamp (diagram)
or horn (rest position)
alarm lamp
current loop
VIA-DU-20
***
VIA-DU-S20
*** Optional and can be activated in a BMS.
**** Air temperature sensor will be needed only if in
menu freezing rain precaution the parameter
"local detection" has been selected. When weather
forecast has been selected you have to connect
the voltfree contacts of additional device to these
terminals.
Connection of a
current loop
(rest position)
Notice:
Alarm 2(1)A The alarm relay is always active
(switched on) as long as there is no
fault. The alarm relay is potentialfree
but not suitable for the switching of
safety low voltage (SELV) as there is
no double insulation in the device.
DC
AC
Relais
4(1)A
N L L L'
****
VIA-DU-A10
Alarm
2(1)A