User`s manual

4
GBGB
GBGB
GB
line cables.
5) OUT 3 and logic input are mutually exclusive.
The follow these recommendations to avoid serious
problems which may occur when using relay
output to drive inductive loads.
INDUCTIVE LOADSINDUCTIVE LOADS
INDUCTIVE LOADSINDUCTIVE 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. 6 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. 6
The value of the capacitor (C) and resistor (R) are
shown in the following table.
In every case the cable connected to the relay
outs must be routed as far away as possible from
input or communication cables.
LOAD
(mA)
<40 mA
<150 mA
<0.5 A
C
(mF)
0.047
0.1
0.33
R
(W)
100
22
47
P.
(W)
1/2
2
2
OPERATING
VOLTAGE
260 V AC
260 V AC
260 V AC
RELAY OUTSRELAY OUTS
RELAY OUTSRELAY OUTS
RELAY OUTS
Fig. 5 RELAY OUTS
The OUT 1 NO contact, 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 are 2A/250V
AC on resistive load.
The number of operations is 1 x 10
5
at specified
rating.
WARNING WARNING
WARNING WARNING
WARNING
Electric shock HazardElectric shock Hazard
Electric shock HazardElectric shock Hazard
Electric shock Hazard
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.
3) Use copper conductors only.
4) Do not run input wires together with power
7
6
C
NO
OUT 2
14
15
C
NO
OUT 3
1
3
2
C
NC
NO
OUT 1
LOAD
R
C
POWER
LINE
1601-03-1-CX.pmd 13/01/2004, 10.424