Use Conditions; Mechanical Mounting; Electrical Connections; Mechanical Data - Eliwell EWTQ 905 Manual

USE CONDITIONS

The instrument CANNOT be used in dangerous
environments (flammable or explosive) without
adequate protection.
The installer must ensure that EMC rules are
respected, also after the instrument installation,
if necessary using proper filters.
Whenever a failure or a malfunction of the
device may cause dangerous situations for per-
sons, thing or animals, please remember that
the plant has to be equipped with additional
devices which will guarantee safety.

MECHANICAL MOUNTING

The instrument, in DIN case 48 x 48 mm, is
designed for flush-in panel mounting.
Make a hole 45 x 45 mm and insert the instru-
ment, fixing it with the provided special bracket.
We recommend that the gasket is mounted in
order to obtain the front protection degree as
declared. Avoid placing the instrument in envi-
ronments with very high humidity levels or dirt
that may create condensation or introduction of
conductive substances into the instrument.
Ensure adequate ventilation to the instrument
and avoid installation in containers that house
devices which may overheat or which may cause
the instrument to function at a higher tempera-
ture than the one permitted and declared.
Connect the instrument as far away as possible
from sources of electromagnetic disturbances
such as motors, power relays, relays, solenoid
valves, etc.
The instrument can be removed from its hous-
ing from the front side : it is recommended that
the instrument be disconnected from the
power supply when it is necessary to carry out
this operation.

ELECTRICAL CONNECTIONS

Warning! Never work on electrical connections
when the machine is switched on.
The instrument is equipped with screw terminal
boards for connection of electrical cables (one
conductor only per terminal for power connec-
tions): for the capacity of the terminals, see the
label on the instrument. The relay contacts are
voltage free.
Do not exceed the maximum current allowed;
in case of higher loads, use an appropriate con-
tactor. Make sure that power supply voltage
meets the instrument voltage.
It is also recommended that all the electrical
circuits connected to the instrument must be
protect properly, using devices (ex. fuses) pro-
portionate to the circulating currents.
It is strongly recommended that cables with
proper insulation, according to the working
voltages and temperatures, be used.
Furthermore, the input cable of the probe has
to be kept separate from line voltage wiring. If
the input cable of the probe is screened, it has
to be connected to the ground with only one
side.
EWTQ 905
TECHNICAL DATA - ELECTRICAL DATA
Power supply: 24, 115, 230 VAC, 24 VAC/VDC,
100... 240 VAC +/- 10%
Frequency AC: 50/60 Hz
Power consumption: 5 VA approx.
Input/s: 1 input for temperature probes: tc J,K;
RTD Pt 100 IEC; PTC KTY 81-121 (990 W @ 25
°C); NTC 103AT-2 (10KW @ 25 °C) or mV sig-
nals 0...50 mV, 0...60 mV, 12 ...60 mV or normal-
ized signals 0/4...20 mA, 0..1 V, 0/1...5 V ,
0/2...10 V.
Normalized signals input impedance: 0/4..20
mA: 51 W; mV and V: 1 MW
Output/s: Up to 2 outputs. Relay SPST-NO (8 A-
AC1, 3 A-AC3 / 250 VAC) ; or in tension to drive
SSR (8mA/ 8VDC).
Auxiliary supply output: 10 VDC / 20 mA Max.
Electrical life for relay outputs: 100000 operat.
Installation category: II
Measurement category: I
Protection class against electric shock: Class II
for Front panel
Insulation: Reinforced insulation between the
low voltage section (supply and relay outputs)
and the front panel; Reinforced insulation
between the low voltage section (supply and
relay outputs) and the extra low voltage section
(inputs, SSR outputs); No insulation between
input and SSR outputs.

MECHANICAL DATA

Housing: Self-extinguishing plastic, UL 94 V0
Dimensions: 48 x 48 mm DIN, depth 98 mm
Weight: 225 g approx.
Mounting: Flush in panel in 45 x 45 mm hole
Connections: 2 x 1 mm2 screw terminals block
Degree of front panel protection : IP 54 mount-
ed in panel with gasket
Pollution situation: 2
Operating temperature: 0 ... 50 °C
Operating humidity: 30 ... 95 RH% without con-
densation
Storage temperature: -10 ... +60 °C
FUNCTIONAL FEATURES
Control: ON/OFF, single and double action PID
Measurement range: according to the used
probe (see range table)
Display resolution: according to the probe used
1/0,1/0,01/0,001
Overall accuracy: +/- 0,5 % fs
Sampling rate: 130 ms.
Display: 4 Digit Red h 12 mm
PANEL CUT-OUT
PLEASE NOTE: The technical data included in this
document, related to measurement (range, accu-
racy, resolution, etc.) refer to the instrument
itself, and not to its equipment such as, for exam-
ple, sensors.
This means, for example, that sensor(s) error(s)
shall be added to the instrument's one.
LIABILITY AND RESIDUAL RISKS
Eliwell & Controlli srl shall not be liable for
any damages deriving from:
- installation/use other than that prescribed
and, in particular, that which does not com-
ply with safety standards anticipated by regu-
lations and/or those given herein;
- use on boards which do not guarantee ade-
quate protection against electric shock, water
or dust under the conditions of assembly
applied;
- use on boards which allow access to dan-
gerous parts without the use of tools;
- tampering with and/or alteration of the
products;
DISCLAIMER
This manual and its contents remain the sole
property of Eliwell & Controlli s.r.l., and shall
not be reproduced or distributed without
authorization. Although great care has been
exercised in the preparation of this docu-
ment, Eliwell & Controlli s.r.l., its employees
or its vendors, cannot accept any liability
whatsoever connected with its use. Eliwell &
Controlli s.r.l. reserves the right to make any
changes or improvements without prior
notice.
min. 15 mm
45
RECOMMENDED
PANEL CUTOUTS
6/8