Selected parameters MODULE TYPE Accessory HOUSING DIN-rail POWER SUPPLY none I/O TYPE None NUMBER OF I/O 0 Others MODULE TYPE Termination unit HOUSING H1 (W18) I/O TYPE None POWER SUPPLY none MAIN CHARACTERISTICS Dupline termination unit to avoid cable reflections
Cable Termination Unit Type DT 01 Duline® FieldbusInstallationbus • Removes distortion caused by reflections • H1-housing • For mounting on DIN-rail (EN 50022) • No power supply needed Product Description Ordering Key DT 01 Dupline®terminationunitfor removing distortion caused by Type Selection reflections from thecable ends. Type: Dupline® Type no. General Specifications Ordering no. Cable termination unit DT 01 No code module required Supply Specifications Rated operational currentTyp. 220 µA Power dissipation £ 10 mW Environment Degree of protection IP 20 Pollution degree3 (IEC 60664) Operating temperature-20° to +50°C (-4° to +122°F) Storage temperature -50° to +85°C (-58° to +185°F) Humidity (non-condensing)0 to 80% Mechanical resistance Shock15 G (11 ms) Vibration 2 G (6 to 55 Hz) Dimensions Material (see "Technical Information") H1-Housing Weight45 g Modeof Operation When a generator connected to a non-terminated cable emits a square-wave signal, the cable ends will always cause reflections.Depending ondistanceandfrequency, the signal can be distorted to a degree where the informa- tion becomes unreliable. However, these reflections can easily be removed by mounting the correct termina- tion at the cable end. In the case ofDupline®thecritical distance between the genera- tor and the far cable end is 2 km and above. Consequently, if as a rule of thumb a DT 01 termination unit is mounted at the cable end when the dis- tance to the channel genera- tor exceeds 1.2 km, reflec- tions are avoided. Note 1: In case ofbranches onthe cableit is only necessary to mount a second DT 01 if the distanceto the nearest DT 01 exceeds 1.2 km. In all other cases a second DT 01 should notbe mountedsince itin- creases thecapacityofthe cableandtherebyreduces the transmission distance. Note 2: The DT 01istheonlyunit which can remove reflections and consequently cannot be replaced by other Dupline® modules. Specifications are subject to change without notice (28.04.03)1 Dupline®is a registered trademark. A product of the CARLO GAVAZZI Group
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