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User Guide
PRESSURE TRANSMITTER SX SERIES
8.1.1 Important information
Read this instruction manual carefully before installing and commissioning the unit. Keep it in a safe place, where it is
accessible to users at any time.
The safety of any instrument results from the careful selection of the model and installation in the system, as well as from
compliance with the maintenance procedures drawn up by the manufacturer. The persons tasked with the selection, installation
and maintenance must be able to recognise the conditions that have a negative impact on the instrument's ability to perform its
function and which may lead to premature breakage or failure. Therefore, qualified, trained technicians are to be employed for
carrying out the procedures laid down in the plant regulations.
Incorrect use may result in damage to the instrument, and possibly cause breakage or damage to personnel or the plant.
In order to correctly select the functional and constructive characteristics of the instruments, we recommend consulting the most
up-to-date version of the catalogue data sheets, available on-line at the website
The user is entirely responsible for ensuring correct installation and maintenance.
8.1.2 Function
The pressure transmitter is used to transform an input pressure into an electrical 4 - 20 mA output signal.
The electrical signal changes in proportion to the input pressure applied.
8.1.3 Application
The SX series of pressure transmitters are used for measuring the pressure of liquid and gas fluids, and are suitable for
use in places in which there is a risk of explosion. Ambient and process temperatures must be within the limits stated
on the tag.
8.1.4 Classification
II 1GD Ex ia IIC T6 Ex ia IIIC T85°C
II 1/2GD Ex ia IIC T6 Ex ia IIIC T85°C
8.1.5 Electrical characteristic
2
Directive requirements
ATEX 2014/34/EU
Ci (equivalent internal capacity): 19 nF
Ci (equivalent internal capacity + permanent cable): 19 nF + 0,2 nF/m
Li (equivalent internal inductance): ~ 0
Li (equivalent internal inductance + permanent cable): ~ 0 + 2 µH/m
( ) For some configurations the minimum power supply voltage is 8 V.
www.nuovafima.com
Reference to Standards
CEI EN 60079-0
CEI EN 60079-26
T6 (T85°C) @ Ta≤60°C
T5 (T100°C) @ Ta≤80°C
T4 (T135°C) @ Ta≤100°C
T6 (T85°C) @ Ta≤60°C
T5 (T100°C) @ Ta≤80°C
T4 (T135°C) @ Ta≤100°C
Power supply voltage: (8)10 ... 30 V
Output: 4 ... 20 mA
Ui (maximum voltage): 30 Vdc
Ii (corrente massima): 100 mA
Pi (maximum current): 1 W
NUOVA FIMA - Industrial instrumentation for Pressure and Temperature
CEI EN 60079-11
UNI EN 1127-1
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