Monitoring Relays Pump alternating Type DLA73 • Pump alternating relay for 2 pumps • Output: 3 x 5 A SPST relay • 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 pump in case of simulta- neous activation is required • Built-in function for automatic rotation of the pumps • Alarm relay output managed by one indipendent input contact Product Description Ordering Key DLA 73 T B23 2P DLA73 is relay made to alternate 2 pumps in a multi- ple pump system. In case of need (i.e.: overflow) the sec- ond pump can be activated together with the first one. The unit actives the third outputrelay (i.e.: foralarm signal) by closing one indipendent input contact. In case more than one pump isrequiredtostartatthe same time, the pumps start 10 s after the previous to avoid big inrush current. The LED indicates the state of the alarm and the output relay. 35.5 mm wide housing suit- able both for back and front panel mounting. Housing Function Type Item number Output Power supply Number of pumps Type Selection MountingOutputFunctionSupply: 24/48 VAC Supply: 115/230 VAC DIN-rail3 x SPST For two pumps DLA 73 T B48 2PDLA 73 T B23 2P InputSpecifications Contact input Terminals Normal mode ON/OFF 1 pumpC, S1 ON/OFF 2 pumpsC, S2 ON/OFF 3rd SPST output (15-38) C, S3 Full mode ON 1 pumpC, S1 ON 2 pumpsC, S2 ON/OFF 3rd SPST output (15-38) C, S3 OFF all pumps C, S4 Disabled> 10 kΩ Enabled < 1 kΩ Voltage< 25 V Current< 2 mA Empting mode N.O. contacts Filling mode N.C. contacts Output Specifications Output3 x SPST NO relay Rated insulation voltage250 VAC Contact ratings (AgSnO2) µ Resistive loadsAC 15 A @ 250 VAC DC 125 A @ 24 VDC Small inductive loads AC 151.5 A @ 250 VAC DC 131.5 A @ 24 VDC Mechanical life ≥ 30 x 106 operations Electrical life ≥ 105 operations (at 5 A, 250 V, cos ϕ = 1) Operating frequency≤ 7200 operations/h Dielectric strength Dielectric voltage 2 kVAC (rms) Rated impulse withstand volt.4 kV (1.2/50 µs) Specifications are subject to change without notice (04.06.10)1
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