iTEMP TMT82 Technical data
Endress+Hauser 47
12.3 Power supply
Supply voltage Values for non-hazardous areas, protected against polarity reversal:
• Head transmitter
– 11 V ≤ Vcc ≤ 42 V (standard)
– 11 V ≤ Vcc ≤ 32 V (SIL mode)
– I: ≤ 23 mA
• DIN rail device
– 12 V ≤ Vcc ≤ 42 V (standard)
– 12 V ≤ Vcc ≤ 32 V (SIL mode)
– I: < 23 mA
Values for hazardous areas, see Ex documentation .
Current consumption • 3.6 to 23 mA
• Minimum current consumption 3.5 mA, multi-drop mode 4 mA (not possible in the SIL
mode)
• Current limit ≤ 23 mA
Terminals Choice of screw or spring terminals for sensor and fieldbus cables:
Terminal version Cable version Cable cross-section
Head
transmitter / DIN
rail device
Head transmitter
Screw terminals Rigid or flexible ≤ 2.5 mm² (14 AWG)
Head transmitter
Spring terminals (cable
version, stripping length =
min. 10 mm (0.39 in)
Rigid or flexible
0.2 to 1.5 mm²
(24 to 16 AWG)
Flexible with wire end
ferrules without plastic
ferrule
0.25 to 1.5 mm²
(24 to 16 AWG)
Flexible with wire end
ferrules with plastic ferrule
0.25 to 0.75 mm²
(24 to 18 AWG)
When connecting flexible cables to spring terminals, it is recommended not to use
wire end ferrules.
Residual ripple Permanent residual ripple U
ss
≤ 3 V at U
b
≥ 13.5 V, f
max.
= 1 kHz
12.4 Performance characteristics
Response time The measured value update depends on the type of sensor and connection method and
moves within the following ranges:
Resistance thermometer (RTD) 0.9 to 1.3 s (depends on the connection method 2/3/4-wire)
Thermocouples (TC) 0.8 s
Reference temperature 0.9 s
When recording step responses, it must be taken into account that the times for the
measurement of the second channel and the internal reference measuring point are
added to the specified times where applicable.
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