18
18
18
18
18.1
18.1
18.1
18.1
ELECTRICAL
ELECTRICAL
ELECTRICAL
ELECTRICAL CONNECTIONS
CONNECTIONS
CONNECTIONS
CONNECTIONS
General
General
General
General warnings
warnings
warnings
warnings
<IMGINFO>
56,7
43,9
1
2
51
-28,35
-1
IMPORTANT!
IMPORTANT!
IMPORTANT!
IMPORTANT!
Make
Make
Make
Make sure
sure
sure
sure the
the
the
the machine
machine
machine
machine is
is
is
is switched
switched
switched
switched off
off
off
off before
before
before
before working
working
working
working on
on
on
on the
the
the
the
electrical
electrical
electrical
electrical connections
connections
connections
connections
.... The
The
The
The operations
operations
operations
operations must
must
must
must be
be
be
be carried
carried
carried
carried out
out
out
out by
by
by
by qualified
qualified
qualified
qualified personnel.
personnel.
personnel.
personnel.
To ensure proper connections, comply with the following:
•
A power supply with characteristics different from those specified can seriously damage the
system
.
•
Use
Use
Use
Use
cables
cables
cables
cables of
of
of
of suitable
suitable
suitable
suitable section
section
section
section for
for
for
for the
the
the
the terminals
terminals
terminals
terminals used.
used.
used.
used.
The instrument is equipped with screw-in clamps for connecting electrical cables of section up to 2.5 mm
2
(one wire per
terminal for power connections): for the capacity of the terminals, see the
label
on the instrument. When current exceeds 8A on relay outputs,
use
2 faston connector cables of 2.5
•
•
•
18.1.1
18.1.1
18.1.1
18.1.1
mm2 section for the outputs for each single contact so as to keep the temperature of the cables below 85°C.
Separate the cables of probes and
digital inputs
from inductive loads and high voltage connections to prevent any electromagnetic interference.
Do not place the probe cables near other electrical equipment (switches, meters, etc.)
Make connections as short as possible and do not wind them around electrically connected parts.
To avoid causing static discharges, do not touch the electronic components on the boards.
Power
Power
Power
Power supply
supply
supply
supply ---- High
High
High
High voltage
voltage
voltage
voltage inputs
inputs
inputs
inputs (relay)
(relay)
(relay)
(relay)
The relay outputs are voltage free. Do not exceed the maximum permitted current; for higher loads,
use
a contactor with sufficient power capacity.
Important!
Important!
Important!
Important!
Make sure that power supply is of the correct voltage for the device.
18.1.2
18.1.2
18.1.2
18.1.2
Analogue
Analogue
Analogue
Analogue inputs-Probes
inputs-Probes
inputs-Probes
inputs-Probes
Temperature
Temperature
Temperature
Temperature
probes
probes
probes
probes
Humidity
Humidity
Humidity
Humidity probes
probes
probes
probes
The
temperature probes
have no characteristic insertion polarity and can be extended using standard bipolar cable (note that extending cables can affect
the performance of the device in terms of electromagnetic compatibility: take great care with the wiring).
Important!
Important!
Important!
Important!
Humidity probes
have a specific insertion polarity which must be observed.
Signal cables (temperature/pressure probes,
digital inputs
,
TTL serial
) must be cabled separately from high voltage cables.
Eliwell supplied cables are recommended. Contact Eliwell sales department for item availability.
EWHT 1800LX
101/141
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