3
EWPC 902/S 7/2000 ing
Mounting
: flush panel mount with mount-
ing bracket.
Protection
: the instrument frontpanel is
waterproof IP65; an optional snap-on cov-
er can be supplied to provide additional
protection of the rear terminal block.
Connections
: screw terminal block
(2.5 mm
2
; one wire each terminal only, in
compliance with VDE norms).
Display
: 12.5 mm LED (0.50").
Push buttons
: located on front panel.
Data storage
: non-volatile EEPROM
memory.
Operating temperature
: –5…65 °C;
(23…149 °F).
Storage temperature
: –30…75 °C;
(–22…167 °F).
Output
: one (1) SPDT relay 8(3)A 250V
a
.
Auxiliary output
: 12 V
c
/60 mA (for trans-
ducer power supply, e.g. humidity sensor,
pressure transducer, etc.).
Inputs
(depending on model): PTC / Pt100
/ current (4…20 mA; Ri = 41
Ω
) for EWPC
902/T/S; EWHS 28/31 for EWPC 902/R/S
and EWPA 007/030 for EWPC 902/P/S.
NOTE: the four-wires EWHS 31 need the
external voltage.
Serial connection
: RS-485 serial port for
connection to the Televis system.
Televis system compatibility
: software
release 2.3.2 or greater.
Resolution
: 1 °C (°F) or 0.1 °C (°F). The
right-most digit can also be set to read-out
in 0 or 5 only, or in all 10 digits.
Accuracy
: better than 0.5% of full scale.
Power supply
: 12…24 V
a
/
c
.
DISCLAIMER
This manual and its contents remain the
sole property of Invensys Climate Controls
s.p.a., and shall not be reproduced or dis-
tributed without authorization. Although
great care has been exercised in the
preparation of this document, Invensys
Climate Controls s.p.a., its employees or
its vendors, cannot accept any liability
whatsoever connected with its use.
Invensys Climate Controls s.p.a. reserves
the right to make any changes or improve-
ments without prior notice.
EWHS 28
input
4…20 mA
input
12 Vdc out
blue
br
own
EWPC 902/S
6 7 8 9
POWER SUPPLY
5
10
7 8
PTC
Pt100
load
7 8
7 8
7 8
1 2 3
+
–
RS-485
EWPA 007
EWPA 030
br
own
white
7 8
CONNECTIONS
Invensys Climate Controls s.p.a.
via dell'Industria, 15
Zona Industriale Paludi
32010 Pieve d'Alpago (BL)
ITALY
Tel39 0437 986111
Fac39 0437 986066
Email [email protected]
Internet http:/www.climate-eu.invensys.com
7/2000 ing
cod. 9FT40075
