Monitoring Relays Pump alternating Type DLA71 Pump alternating relay for 2 or 3 pumps Output: 2 x 5 A SPST relay or 3 x 5 A SPST For mounting on DIN-rail in accordance with DIN/EN 50 022 35.5 mm DIN-rail housing LED indication for relay and power supply ON Galvanically separated power supply Built-in delay for the second or third pump in case of simultaneous activation is required Built-in function for automatic rotation of the pumps Product Description Ordering Key DLA 71 T B23 3P DLA71 is relay made to avoid big inrush current. Housing alternate 2 or 3 pumps in a Function multiple pump system. In The LED indicates the state Type case of need (i.e.: overflow) of the alarm and the output Item number the second, or even the third relay. Output pump can be activated Power supply together with the first one. 35.5 mm wide housing suit- Number of pumps In case more than one pump able both for back and front is required to start at the panel mounting. same time, the pumps start 10 s after the previous to Type Selection Mounting Output Function Supply: 24/48 VAC Supply: 115/230 VAC DIN-rail 2 x SPST For two pumps DLA 71 D B48 2P DLA 71 D B23 2P DIN-rail 3 x SPST For three pumps DLA 71 T B48 3P DLA 71 T B23 3P Input Specifications Output Specifications Contact input Terminals Output DLA71...2P 2 x SPST NO relay DLA71...3P 3 x SPST NO relay DLA71...2P (normal mode) Rated insulation voltage 250 VAC ON/OFF 1 pump C, S1 Contact ratings (AgSnO) 2 ON/OFF 2 pumps C, S2 Resistive loads AC 1 5 A 250 VAC DC 12 5 A 24 VDC DLA71...2P (differential mode) Small inductive loads AC 15 1.5 A 250 VAC first pump starts C, S1 DC 13 1.5 A 24 VDC first pump stops C, S3 6 Mechanical life 30 x 10 operations second pump start C, S2 5 Electrical life 10 operations second pump stop C, S4 (at 5 A, 250 V, cos = 1) DLA71...3P (normal mode) Operating frequency 7200 operations/h ON/OFF 1 pump C, S1 Dielectric strength ON/OFF 2 pumps C, S2 Dielectric voltage 2 kVAC (rms) ON/OFF 3 pumps C, S3 Rated impulse withstand volt. 4 kV (1.2/50 s) DLA71...3P (full mode) ON 1 pump C, S1 ON 2 pumps C, S2 ON 3 pumps C, S3 OFF all pumps C, S4 Disabled > 10 k Enabled < 1 k Voltage < 25 V Current < 2 mA Empting mode N.O. contacts Filling mode N.C. contacts Specifications are subject to change without notice (03.06.10) 1DLA71 Supply Specifications General Specifications (cont.) Power supply Overvoltage cat. III Indication for Rated operational voltage (IEC 60664, IEC 60038) Power supply ON LED, green, steady through terminals: One Pump ON as above, flashing 1 Hz A1, A2 or A3, A2 Two Pumps ON as above, flashing 2 Hz B48: 24/48 VAC 15% Three Pumps ON(DLA71...3P) as above, flashing 3 Hz 45 to 65 Hz, insulated Note: if more than one pump B23: 115/230 VAC 15% is active, the indication refers 45 to 65 Hz, insulated to the pump started last. Dielectric voltage First pump activated after Random Supply to input 4 kV (1.2/50 s) power up Supply to output 4 kV (1.2/50 s) Environment (EN 60529) Input to output 4 kV (1.2/50 s) Degree of protection IP 20 Rated operational power Pollution degree 3 AC 3 VA Operating temperature -20 to 60C, R.H. < 95% Storage temperature -30 to 80C, R.H. < 95% Housing Dimensions 35.5 x 81 x 67.2 mm Material PA66 or Noryl General Specifications Weight Approx. 135 g Screw terminals Reaction time Tightening torque Max. 0.5 Nm Closing input < 100 ms acc. to IEC 60947 Opening input < 100 ms Product standard EN 60255-6 Minimum delay to activate the rescue pumps 10 s Approvals UL, CSA Continous working time to CE Marking L.V. Directive 2006/95/EC activate the rotation pumps 6 h 10% EMC Directive 2004/108/EC EMC Immunity According to EN 60255-26 According to EN 61000-6-2 Emissions According to EN 60255-26 According to EN 61000-6-3 Mode of Operation DLA71 is made for pumping Example 2 described in example 1 Note (3-pump system) systems where 2 or 3 pumps (emptying a basin, 2-pump except that if switch S3 is If the system is continuously are in parallel. It lets the system, differential mode) reached three pumps work working with only one pump, pumps work alternatively, In this case the pumps are at the same time. When they after working for 6 hours, allowing more pumps to separately started and switch back the pumps are DLA71 stops the pump and work togheter in case of stopped by the two pairs of turned off in sequence start- the second one automatical- need. switches S1, S2 and S3, S4. ing from the one running ly starts. If also the second Appropriate positioning longer. pump works continuously Example 1 allows the pumps to work alone for 6 hours, it is (emptying a basin, 2-pump together in case of need. Example 4 stopped and the third pump system) (emptying a basin, 3-pump is then started. As soon as the liquid reach- Note (2-pump system) system, full mode) If a couple of pumps is con- es switch S1 one pump If the system is continuously As soon as the liquid reach- tinuously working for 6 starts. As soon as S1 working with only one pump, es switch S1 one pump hours, the one running for switches back the pump after working for 6 hours, starts. When it drops below more time stops and the free stops. When switch S1 is DLA71 stops the pump and switch S4 it stops. If switch one starts. activated again the other the second one automatical- S1 is triggered again another This rotation is repeated pump starts allowing uni- ly starts. pump starts. If switch S2 is every 6 hours of continuative form wear and tear of all the This rotation is repeated activated a second pump work of a pump or a couple pumps. If switch S2 is acti- every 6 hours of single and starts (rescue function). If of pumps. vated both pumps start (2 continuative work of a switch S3 is activated all the pumps running at the same pump. pumps operate. The only Note (2 and 3-pump sys- time). When S2 switches switch to stop all the pumps tems) back the pump running Example 3 active at a certain time is S4. In case the task is to fill a since most time stops. (emptying a basin, 3-pump basin, all the switches are system, normal mode) reversed in the basin itself. The system works exactly as 2 Specifications are subject to change without notice (03.06.10)