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T121 is a converter for Thermoresistance (mA, mV, PT100, Pt1000, Pt500, Ni100, TCs, Ohm) with 2,3,4 wires and convert / isolate it into 4..20mA loop powered signal. It’s completely configurable through PC software. T121 is suitable for in-head mounting (RTD or TC). A 2-way galvanic isolation among input // output circuits assures the integrity of your datas.

Technical Specification

General Data
Power supply 7..30 Vdc (loop powered)
Power consumption 500 mW
Isolation 1.500 Vac (2 way)
Power transducers ----
Accuracy 0,1%
Response time < 620 ms
Settings Easy-LP (PC software)
Mounting In-Head mounting (PT100) Available adapter for DIN RAIL guide
Protection Degree IP20
Operating Temperature -40..+85 °C
Dimension Ø 43,7 x 20 mm

Channel Numbers 1
RTD Pt100 (EN 60751/A2, -200..+650°C, min span 20°C)
Ni100 (-60..+250°C, min span 20°C)
Pt500 2,3,4 wires, range -200… 650 °C
Pt1000 2,3,4 wires, range -200… +200°C
TC: J, K, R, S, T, B, E, N
Potentiometer: 450..1.800 ohm
Voltage: -150..+150 mV

Channel Numbers 1
Current CURRENT (mA)
4..20, 20..4 mA (2 wire)
Resolution 2μA = 13 bit = 0.0125%

Approval CE
Norms EN 50081-2; EN 55011; EN 50082-2; EN 61000-2-2/4; EN
50140/141; EN 61010-1

Order codes
Code Description
T121 Isolated loop powered temperature transmitter (in head mounting), Power
supply 7..30 Vdc