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SENECA | AUTOMATION INTERFACES
Loop powered transmitters (B-Head mounting)

Loop powered transmitters (B-Head mounting)

Product catalog summary

Overview: The document provides technical specifications for T-Line loop-powered head-mounted temperature transmitters, specifically models T120 and T121. These devices are designed for use with various temperature sensors and offer configurable output ranges.

Specifications:

Output: 0..20 mA, 4..20 mA
Power Supply: T120: 5-30 Vdc, T121: 7-30 Vdc
Input Types: Pt100, Ni100, Ni500, Pt1000, Thermocouples (TC), Resistance (Ω), Voltage (V)
Accuracy: 0.1%
Resolution: Maximum 16 bit
Operating Temperature: -40 to +85°C
Connection: Push wire clamp

Model Details:

T120: 2-wire loop powered for Pt100 and Ni100 probes
T121: Isolated loop powered universal temperature transmitter

General Features:

Current Output: 4..20 mA, 20..4 mA (2-wire technique)
Isolation (T121 only): 1.5 kVac
Load Resistance: 1 kΩ @ 26 Vdc, 21 mA
Over-range/Fault Output: 102.5% / 105% full scale
Protection: Current output protection at 30 mA approx
Rejection: 50-60 Hz
Error Transmission: 0.1% or 0.1°C
Response Time: T120: <220 ms; T121: <1 s
Protection Index: IP 20
Standards: CE, EN 61000-6-4, EN 61000-6-2

Thermomechanical Features:

Operating Temperature: -40 to +85°C
Connection: Spring terminals
Conductor Section: 0.2 to 2.5 mm²
Box Material: Nylon/Glass
Dimensions: 20 mm, Ø 43.7 mm

Input Specifications:

Pt100: EN 60751/A2 (ITS-90), -200 to +650°C, min span 20°C, 2, 3, 4 wire
Ni100: Range: -60 to +650°C, min span: 20°C, 2, 3, 4 wire
Pt500: Range: -200 to +650°C, 2, 3, 4 wire
Pt1000: Range: -200 to +200°C, 2, 3, 4 wire
TC Types: J, K, R, S, T, B, E, N
Potentiometer: 450 to 1800 Ω (up to 100 kΩ with parallel resistance)
Voltage: -150 to +150 mV

Settings:

Factory Setting: RTD wiring: 3 wire; input filter enabled; reversed output; RTD type: Pt100; measurement scale: 0 to 100°C
PC Setting: Start/full scale value; RTD connection; rejection; measurement filter; RTD type; cable resistance; output fault/over-range

Loop powered transmitters (B-Head mounting)

Loop powered transmitters (B-Head mounting)

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