Product Info

iTEMP TMT142
6 Endress+Hauser
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.
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 →  23
The device must be powered only by a power unit that operates using a limited energy circuit in
accordance with UL/EN/IEC 61010-1, Section 9.4 and the requirements in Table 18.
Terminal assignment
3
3
3
3
3
3
1
1
1
1
1
1
1
4
4
2
2
2
2
2
RTD
W
RTD
W
RTD
W
TC
+
-
1
2
3
4
+
-
3
4
S1
-
+
!
4-wire
2-wire 3-wire
11 to 36 V DC
4 to 20 mA
HART® - Signal
Sensor
Sensor
A0026193-EN
 3 Wiring the transmitter
A shielded cable that is grounded on both sides must be used for sensor cable lengths of 30 m (98.4
ft) and more. The use of shielded sensor cables is generally recommended.
Connection of the functional grounding may be needed for functional purposes. Compliance with the
electrical codes of individual countries is mandatory.
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, communication
lines (fieldbus systems) and power supply is diverted to ground. The functionality of the transmitter
is not affected as no problematic voltage drop occurs.
Connection data:
Maximum continuous voltage (rated voltage) U
C
= 36 V
DC
Nominal current I = 0.5 A at T
amb.
= 80 °C (176 °F)