23.402/1 DSD: Differential-pressure switch How energy efficiency is improved Demand-led controlling and monitoring, without auxiliary energy. Areas of application For controlling and monitoring pressures in liquids, gases and vapours, as well as for monitoring the flow of heating pumps. Especially suitable for equipment that is subject to vibrations. Features • Pressure range: 0.2 to 16 bar • Contact rating: 4 mA, 5 V to 10 A, 250 V • Up to 110 °C media temperature • Gold-plated silver contacts • Adjustable switching difference • Sealable • Mechanical service life: > 1x 106 switching cycles PD Technical description • Light-alloy housing with transparent cover made of impact-resistant thermoplastic • Ambient temperature: -20 to +70 °C • IP 65 • Standard housing-mounted plug with cable connector for cables of 6 to 10 mm in diameter bar Switching difference bar Max. sensor values bar Differential-pressure switch with variable switching difference DSD 137 F001 0,2...1,0 0,20...1,4 6 DSD 140 F001 0,4...2,5 0,40...1,6 10 DSD 143 F001 0,5...6,0 0,45...2,2 12 DSD 152 F001 1,0...16 0,60...3,4 25 Differential-pressure switch with fixed, small switching difference DSD 134 F101 0,05...0,4 0,04 6 Contact rating:as silver contacts 1) minimum as gold-plated contacts 2) minimum Permissible vacuum loading DSD 152 10(3) A, 250 V~ 50 W, 250 V= 100 mA, 24 V 160 mA, 50 V 4 mA, 5 V –0,7 bar –1,0 bar PD Weight °C kg 110 110 110 110 0,63 0,63 0,63 0,63 Xs Range Xsd Type Y03307 3 2 1 B06966 110 0,63 Ambient temperature Degree of protection Protection class –20...70 °C IP 65 (EN 60529) I (IEC 60730) Wiring diagram Dimension drawing Fitting instructions A01499 M06967 MV 505424 Accessories 0190403 005* 0259984 000* 0292110 001* 0296936 000* Brass connector with cap nut (Serto system), 2 pieces required Bracket for 3-point fixing Two throttle screws, Rp 1/8, for arresting pressure surges; stainless steel. Fixing bracket for top-hat rails EN 60715, 35 × 7,5 or 35 × 15 *) Dimension drawing or wiring diagram are available under the same number 1) 2) If under inductive load, take RC circuit into account If the contacts are loaded with more than 160 mA, 50 V, the gold plating suffers irreparable damage. They then lose the properties of gold contacts, and operate thenceforth as silver contacts Operation When the pressure falls below the lower switching point (variable setpoint XS), the contacts change over from 1-3 to 1-2. When the pressure rises by the switching difference XSd above the lower switching point, the contacts change from 1-2 to 1-3. The switching difference can be set externally using a grub screw: one turn changes the switching difference by approx. 20 % of its whole range. Sauter Components 7123402003 04 23.402/2 DSD Additional information Materials that come into contact with the medium are of stainless steel (material nos. 1.4104, 1.4435, 1.4541). Additional technical details Reproducibility of Xs Influence coefficient on switching difference 2) Radio suppressed Complies with:Directive 2006/95/EC EMC directive 2004/108/EC Not covered by the PED directive 1) 2) 0,017 as per EN 55014 EN 60730-1/ EN 60730-2-6 EN 61000-6-1/ EN 61000-6-2 EN 61000-6-3/ EN 61000-6-4 Art. 1.3.6 of the PED ± 2% of the range cos ϕ = 1: 10 A, 250,000 switching operations 5 A, 400,000 switching operations 2 A, approx. 106 switching operations cos ϕ = 0.6: 3 A, 400,000 switching operations cos ϕ = 0.3: 1) 3 A, 250,000 switching operations 2 A, 400,000 switching operations 1 A, 700,000 switching operations Mechanical life: > 1 × 106 switching operations cos ϕ < 0.3: substantial reduction in life expectancy; with RC circuitry, life expectancy is as for cos ϕ > 0.3 (see also technical notes). see technical notes Technical notes RC circuit under inductive load For the optimum RC circuitry, refer to the specifications supplied by the manufacturers of the relays, contactors etc. If these are not available, the following rule of thumb can be applied:• Capacitance of the RC circuit (μF) is equal to or greater than the operating current (A). • Resistance of the RC circuit (Ω) is approx. equal to the resistance of the coil (Ω). B03 772 Influence coefficient on switching difference The switching difference is slightly dependent on the setpoint. The switching differences stated in the PDS sheet are typical values at the start of the range. The influence of the setpoint on the switching difference is worked out thus: (setpoint XS - start of range) × influence coefficient. Wiring diagram Dimension drawing 45 80 DSD 10 P 50 25 1 2 3 61 67 A01499a 10 Pg11 166 Rp1/8 Ø4,5 6 Ø45 28 67 Sauter Components 45 48 95 Ø4,5 M06967 7123402003 04 DSD 23.402/3 Accessories 296936 259984 5 25 20 4,5 1,5 4,5 3,5 9 12 5 0, 13 37 10 25 40 32 30 4,5 13 18 M3X6 58 M00654 18 M00166 190403/005 292110 G1/8 24 14 R1/8 Ø6 33 M07633 10 sw14 R1/8 M09870 Sauter Components Printed in Switzerland Right of amendment reserved N.B.: A comma between cardinal numbers denotes a decimal point © Fr. Sauter AG, CH-4016 Basle 7123402003 04