ero electronic TMS Mode D'emploi page 8

C) RELAY OUTPUTS C) RELAY OUTPUTS C) RELAY OUTPUTS C) RELAY OUTPUTS C) RELAY OUTPUTS
C - OUT 3
AL2/HBD 10
(OUT 3)
NO - OUT 3
11
NO/NC
[see Fig.11 (J303)]
AL1/COOL 16
(OUT 2)
C - OUT 2
17
C
OUT 1 20
NO
21
NC
22
Fig. 7 RELAY OUTPUT WIRINGS
The output 2 and the NO contact of the output 1 are
protected, by varistor, from inductive load with an
inductive component up to 0,5 A.
The rating of the out 1 contact is equal to 3A/250
V AC on resistive load.
The rating of the out 2 and 3 contacts is equal to
2A/250 V AC on resistive load.
The number of operations is 1 x 10 at specified
5
rating.
NOTES NOTES
NOTES NOTES NOTES:
1) To avoid electric shock, connect power 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 together with power cables.
5) Relay output and SSR drive output are both
available. When a relay output is desired it is
necessary to enable the SSR output and
viceversa (see chapter "Preliminary hardware
settings").
OUT 2
The following recommendations avoid serious
problems which may occur, when using relay
output for driving inductive loads.
INDUCTIVE LOADS INDUCTIVE LOADS INDUCTIVE LOADS INDUCTIVE LOADS INDUCTIVE LOADS
High voltage transients may occur when switching
inductive loads.
Through the internal contacts these transients
may introduce disturbances which can affect the
performance of the instrument.
The internal protection (varistor) assures a correct
protection up to 0.5 A of inductive component but
the OUT 1 NC contact and out 3 are not
protected.
The same problem may occur when a switch is
used in series with the internal contacts as shown
in Fig. 8.
C
R
LOAD
Fig. 8 EXTERNAL SWITCH IN SERIES WITH
THE INTERNAL CONTACT
GB GB
GB GB GB 5
POWER
LINE