4
GB
GB
GB
GB
GB
3)
Use copper conductors only.
4) Do not run input wires together with power
line cables.
The following recommendations avoid serious
problems which may occur it when using relay
output to drive inductive loads.
INDUCTIVE LOADS
INDUCTIVE LOADS
INDUCTIVE LOADS
INDUCTIVE LOADS
INDUCTIVE LOADS
High voltage transients may occur when switching
inductive loads.
These transients may introduce disturbances
through the internal contacts which can affect the
performance of the instrument.
The internal protection (varistors) assures correct
protection up to 0.5 A of inductive component but
the OUT 1 NC contact is not protected.
The same problem may occur when a switch is
used in series with the internal contacts.
Fig. 7 EXTERNAL SWITCH IN SERIES WITH
THE INTERNAL CONTACT
In these cases an additional RC network should
be installed across the external contact as shown
in Fig. 7
The value of the capacitor (C) and resistor (R) are
shown in the following table.
R
C
LOAD
POWER
LINE
RELAY OUTS
RELAY OUTS
RELAY OUTS
RELAY OUTS
RELAY OUTS
Fig. 6 RELAY OUTS
The OUT 1 NO contact and the OUT 2 and OUT 3
contacts are protected by varistors against inductive
load with inductive component up to 0.5 A.
The OUT 1 contact rating is 3A/250V AC on
resistive load.
The OUT 2 and OUT 3 contact rating is 2A/250V
AC on resistive load.
The number of operations is 1 x 10
5
at specified
rating.
NOTES:
NOTES:
NOTES:
NOTES:
NOTES:
1) To avoid electric shock, connect the power
line at the end of the wiring procedure.
2) For power connections use No 16 AWG or
larger wires rated for at least 75°C.
7
6
C
NO
OUT 2
14
15
C
NO
OUT 3
1
3
2
C
NC
NO
OUT 1
02-0316-1-DER.pmd
22/04/2004, 16.19
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