Instruction manual

SITRANS TW
A5E00054075-05
119
Technical data
Auxiliary power
Universal power supply unit 115/230 V AC/DC or 24 V AC/DC
Tolerance range for power supply
• With 115/230 V AC/DC PSU 80 ... 300 V DC; 90 ... 250 V AC
• With 24 V AC/DC PSU
18 ... 80 V DC; 20.4 ... 55.2 V AC
(in each case interruption-resis-
tant up to 20 ms in the complete
tolerance range)
Tolerance range for mains frequency
47 ... 63 Hz
Power consumption with
• 230 V AC  5 VA
•230 V DC
 5W
• 24 V AC
 5 VA
•24 V DC
 5W
Electrically isolated
Electrically isolated circuits Input, output, power supply and
sensor fault/limit monitoring out-
put are electrically isolated from
one another. The HART interface
is electrically connected to the
output.
Working voltage between all electri-
cally isolated circuits
The voltage U
rms
between any
two terminals must not exceed
300 V
Measuring accuracy
Accuracy
• Error in the internal cold junction  3°C ± 0.1 °C / 10 °C
( 5.4 °F ± 0.18 °F / 18 °F)
• Error of external cold junction ter-
minal 7NG3092-8AV
 0.5 °C ± 0.1 °C / 10 °C
( 0.9 °F ± 0.18 °F / 18 °F)
• Digital output
See "Digital error"
• Analog output I
AN
or U
AN
 0.05 % of the span plus digital
error
Influencing effects (referred to the
digital output)
Compared to the max. span:
• Temperature drift
 0.08 % / 10 °C ( 0.08 % /18 °F)
 0.2 % in the range
-10...+60°C (14...140°F)
• Long-term drift
 0.1 % / year
Influencing effects referred to the
analog output I
AN
or U
AN
Compared to the span:
• Temperature drift
 0.08 % / 10°C ( 0.08 % / 18 °F)
 0.2 % in the range
-10...+60°C (14...140°F)
• Power supply
 0.05 % / 10 V
• Load with current output
 0.05 % on change from 50  to
650 
• Load with voltage output
 0.1 % on change in the load
current from 0 mA to 10 mA
• Long-term drift (start-of-scale val-
ue, span)
 0.03 % / month
Response time (T
63
without electri-
cal damping)
 0.2 s
Electromagnetic compatibility
According to EN 61 326 and
NAMUR NE21
Certificates and approvals
ATEX EN 60079-0 : 2009
EN 60079-11 : 2007
Intrinsic safety to EN 60079-11
for 7NG3242-.A.../.B...
II (1) G [Ex ia Ga] IIC resp.
II (1) D [Ex ia Da] IIIC
EC type-examination certificate
TÜV (German Technical Inspec-
torate) 01 ATEX 1675
Other certificates
GOST, NEPSI
Conditions of use
Installation conditions
Location (for devices with explosion
protection)
• Transmitters Outside the potentially explosive
atmosphere
• Sensor
Within the potentially explosive
atmosphere zone 1 (also in
zone 0 in conjunction with the
prescribed protection require-
ments for the sensor)
Ambient conditions
Permissible ambient temperature -25 ... +70 °C (-13 ... +158 °F)
Permissible storage temperature
-40 ... +85 °C (-40 ... +185 °F)
Climatic class
• Relative humidity 5 ... 95 %, no condensation
Design
Weight Approx. 0.24 kg (0.53 lb)
Enclosure material
PBT, glass-fibre reinforced
Degree of protection to IEC 529
IP20
Degree of protection to VDE 0100
Protection class I
Type of installation
35-mm DIN rail (1.38 inch)
(EN 50022) or 32-mm G-type rail
(1.26 inch) (EN 50035)
Electrical connection / process con-
nection
Screw plug connectors, max.
2.5 mm² (0.01 inch²)
Parameterization interface
Protocol HART, version 5.9
Load with connection of
• HART communicator 230 ... 650 
• HART modem
230 ... 500 
Software for PC/laptop
SIMATIC PDM version V5.1 and
later
EN 61241 : 2006