Technical data iTEMP TMT112
28 Endress+Hauser
12.2 Output
12.2.1 Output signal
Output signal 4 to 20 mA, 20 to 4 mA
Signal on alarm • Measurement range undercut:
Linear drop to 3.8 mA
• Exceeding measurement range:
Linear drop to 20.5 mA
• Sensor breakage; Sensor short circuit (not for
thermocouples TC):
≤3.6 mA or ≥ 21.0 mA (for configuration ≥ 21.0 mA,
output is ≥ 21.5 mA)
Load Max. (V
Power supply
–12 V) / 0.022 A (Current output)
Linearization / transmission behaviour Temperature linear, resistance linear, voltage linear
Filter Digital filter 1. degree: 0 to 100 s
Galvanic isolation U = 2 kV AC for 1 minute (Input/output)
min. current consumption ≤ 3.5 mA
Current limit ≤ 23 mA
Switch on delay 4 s (during power up I
a
3.8 mA)
12.3 Power supply
12.3.1 Electrical connection
RTD W
RTD W
RTD WTC
2-wire 3-wire 4-wire
12 to 35 V
12 to 30 V Ex
4 to 20 mA
HART Signal
®
OUT
GND -
5
6
1
2
3
4
6
5
1 1
1
2
4
2
1 1
1 1
3
3
3 3
2
2
2 2
4
4
A0040217
6 Temperature transmitter terminal connections
For the unit operation via HART® protocol (terminals 5 and 6) a minimum load resistance of
250 Ω is necessary in the signal circuit!
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