4EWPX 193(/E) 11/97 ing
in such separation by using separated in-
sulating pipes and special cable fixing sys-
tems.
EWPX ECHO (version /E only) operates at
very low safety voltage and shall be in-
stalled respecting the same insulation/sep-
aration conditions from the parts bearing
voltage and the wires of the relay contacts.
ERROR MESSAGES
In case of shorted, interrupted or discon-
nected probe the instrument displays error
message “E1” for the regulation probe,
“E2” for the defrost probe and “E3” for the
display probe. The same message will ap-
pear in case of “under range”, i.e. in case
the value is below the minimum readable
measurement, or “over range” (value ex-
ceeding the upper limit).
Before replacing the probe always check
its connections.
TECHNICAL DATA
Housing: plastic resin PC+ABS extin-
guishing grade V0.
Size: front panel 76x34 mm, depth
58 mm.
Mount: panel mount on 71x29 mm hole.
Protection: front IP65.
Connections: on screw terminal block for
wires max 2.5 mm
2
(one wire only per
block in compliance with VDE regulations).
Remote connection: serial connection to
the EWPX ECHO repeater (version /E only).
Serial connection: TTL port for the con-
nection to the EWRS 485 interface for
TELEVIS system linking.
Display: 3 digit plus “-” sign; digit height
12.5 mm.
Commands: all located on front panel.
Data storage: on non-volatile memory
(EEPROM).
Operating temperature: –5…65 °C;
(23…149 °F).
Storage temperature: –30…75 °C;
(–22…167 °F).
Main outputs: 1 on N.O. relay 8(3)A 250V
AC for the compressor, 2 on N.O. relay
5(2)A 250V AC for the fans and defrost
system of the first evaporator.
Second evaporator output: 1 output on
N.O. relay 8(3)A 250V AC.
Analogue inputs: three NTC probes for
temperature control and defrost manage-
ment for first evaporator and second evap-
orator.
Range: –50…100 °C (–58…212 °F).
Resolution: 1 °C, 0.1 °C, or 0.5 °C, se-
lectable through parameters.
Accuracy: better than 0.5% on full range.
Consumption: 3VA (5 VA in the “/E” ver-
sion with the EWPX ECHO module con-
nected).
Power supply: 12 Vac/dc ±15%.
Eliwell S.p.A.
via dell’Artigianato, 65
Zona Industriale
32010 Pieve d’Alpago (BL)
Italy
Telephone +39 (0)437 986111
Facsimile +39 (0)437 989066
A Siebe Group Company
To Previous Page
Loading...