TERRANOVA® is a group gathering the oldest and most historical Italian Brands of Process Instrumentation: Spriano® (1923), Valcom® (1974) and Mec-Rela® (1976).

Head Office
Via Rosso Medardo 16, 20159 Milano, Italy
Operative Office
Via Gramsci 1, 26827 Terranova dei Passerini (LO), Italy

Tel. +39 0377 911066
Fax +39 0377 919156


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    TSU Series

    TSU series galvanically isolated safety barriers are designed for connection to ON-OFF sensors (two wires) with current (5 mA / 13 mA ? 1 mA) or frequency (1,2 kHz / 3,8 kHz ? 0,2 kHz) output.

    Inputs are constantly monitored to reveal any possible wiring anomalies (such as short circuit, open circuit or dispersion to ground). The ON-OFF signals from the sensors are retransmitted to the output with the control signals separated for each channel. The presence of bicolor LED?s in input and output circuits allows to locally monitor the status of barrier and sensors.

    The small size of the housing and the presence of two channels per unit offer the possibility of a high density wiring on DIN rail 35mm.


    TSU series barriers can be used in all applications where is requested an isolation between sensors for ON-OFF service (current or frequency output) and the power supply. TSU barriers are especially suitable for ships applications, and for hazardous areas installations being ATEX certified.

    Great advantages are offered by the use of TSU series barriers interfaced with Valcom? level switches ASL & LSG series.

    Additional information


    Measure Principle

    Measuring Range

    Process Temperature

    Accuracy Class





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