OPERATING MANUAL
MN-SST70
ED-19-01
SPRIANO® TECHNOLOGIES
- www.spriano.it – [email protected]
a TERRANOVA® Srl brand
- www.terranova-instruments.com - VAT IT07848810151
Factory & Sales: Via Gramsci 1 – 26827 Terranova dei Passerini (LO) – Italy
Head Office: Via Rosso Medardo 16 – 20159 Milano – Italy Ph: +39 0377 919119 – Fax: +39 0377 855720
Pa
g.
16
/52
M
ANDATORY
!
In order to obtain a 4 ÷ 20 mA + Hart® output a minimum load of 250 Ohm is
required.
TAG
-
1
2
3
4
Vdc
12.5
17.4
24
25.2
30
Ohm
23
250
558
615
837
Figure 10: operating area for Ex d protection
The electronic transmitters series SST70 are fully comply with the HART® protocol specification
Revision 6.0, so they include remote process variable interrogation, parameter setting and
diagnostics. The device is a 4 ÷ 20mA 2-wire transmitter, with FSK communication.
It is possible to read via HART® the following variables:
PV
: transmitter primary measure;
SV
: % of the span;
TV
: analog output;
FV:
sensor temperature.
for the 4÷20 mA + Hart® modem connection.
the multidrop Hart® connection type is shown.
Vdc