Relay Outputs - ero electronic LIMITROL LHL Mode D'emploi

C.1) RELAY OUTPUTS C.1) RELAY OUTPUTS
C.1) RELAY OUTPUTS C.1) RELAY OUTPUTS C.1) RELAY OUTPUTS
OUT 1
1
2
Class 1
3
OUT 2
7
Class 1
(Alarm)
8
Fig.10 OUTPUTS RELAY WIRING
The OUT 1 contact rating is 3A/250V AC on
resistive load.
The OUT 2 contact rating is 2A/250V AC on
resistive load.
The number of operations is 1 x 10
rating.
NOTES NOTES NOTES 1) To avoid electric shock, connect power
NOTES NOTES
line at the end of the wiring procedure.
2) For power connections use No 16 AWG
or larger wires rated for at last 75 °C.
3) Use copper conductors only.
4) Don't run input wires with power
cables.
All relay contacts are protected by varistor against
inductive load with inductive component up to 0.5 A.
The following recommendations avoid serious
problems which may occur, when relay outputs
are used with inductive loads.
NO - OUT 1
C - OUT 1
NC - OUT 1
C
NO
at specified
5
GB GB GB GB GB
C.2) INDUCTIVE LOADS C.2) INDUCTIVE LOADS
C.2) INDUCTIVE LOADS C.2) INDUCTIVE LOADS C.2) INDUCTIVE LOADS
High voltage transients may occur switching
inductive loads.
Through the internal contacts these transients
may introduce disturbances which can affect the
performance of the instrument.
For all the outputs, the internal protection
(varistor) assures a correct protection up to 0.5 A
of inductive component.
The same problem may occur when a switch is
used in series with the internal contacts as shown
in Fig. 11
Fig. 11 EXTERNAL SWITCH IN SERIES WITH
THE INTERNAL CONTACT
In this case it is recommended to install an
additional RC network across the external contact
as show in Fig. 11
The value of capacitor (C) and resistor (R) are
shown in the following table.
LOAD C
(mA) (µF)
<40 mA 0.047
<150 mA 0.1
<0.5 A 0.33
Anyway the cable involved in relay output wiring
must be as far away as possible from input or
communication cables.communication cables.
7
C
R
POWER
LINE
LOAD
R
P. OPERATING
(Ω) ( W ) VOLTAGE
100
1/2 260 V AC
22
2 260 V AC
47
2 260 V AC