iTEMP TMT142B Technical data
Endress+Hauser 49
Device description files (DTM, DD) Information and files under:
www.endress.com
www.fieldcommgroup.org
HART load min. 250 Ω
HART device variables Measured value for primary value (PV)
Sensor (measured value)
Measured values for SV, TV, QV (secondary, tertiary and quaternary
variable)
• SV: device temperature
• TV: sensor (measured value)
• QV: sensor (measured value)
Supported functions • Squawk
• Condensed status
Wireless HART data
Minimum starting voltage 11 V
DC
Start-up current 3.58 mA
Start-up time until HART communication is possible 2 s
Start-up time until measured value is available 7 s
Minimum operating voltage 11 V
DC
Multidrop current 4.0 mA
Write protection for device
parameters
• Hardware: write protection via DIP switch
• Software: user role-based concept (password assignment)
Switch-on delay • ≤ 2 s until the start of HART® communication.
• ≤ 7 s until the first valid measured value signal is present at the current output.
While switch-on delay: I
a
≤ 3.8 mA.
13.3 Power supply
Supply voltage Values for non-hazardous areas, protected against polarity reversal:
U = 11 to 36 V
DC
(standard)
Values for hazardous areas, see Ex documentation → 60
Current consumption
Current consumption 3.6 to 23 mA
Minimum current consumption ≤ 3.5 mA, Multidrop mode 4 mA
Current limit ≤ 23 mA
Terminals 2.5 mm
2
(12 AWG) plus ferrule
Overvoltage protection The surge arrester can be ordered as an optional extra. The module protects the electronics
from damage from overvoltage. Overvoltage occurring in signal cables (e.g. 4 to 20 mA,
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