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 alternate 2 or 3 pumps in a multiple pump system. In case of need (i.e.: overflow) the second, or even the third pump can be activated together with the first one. In case more than one pump is required to start at the same time, the pumps start 10safterthepreviousto Type Selection 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 MountingOutputFunction Supply: 24/48 VAC Supply: 115/230 VAC DIN-rail2 x SPSTFor two pumps DLA 71 D B48 2PDLA 71 D B23 2P DIN-rail3 x SPSTFor three pumpsDLA 71 T B48 3PDLA 71 T B23 3P InputSpecifications Contact input Terminals DLA71...2P (normal mode) ON/OFF 1 pumpC, S1 ON/OFF 2 pumpsC, S2 DLA71...2P (differential mode) first pump startsC, S1 first pump stopsC, S3 second pump startC, S2 second pump stopC, S4 DLA71...3P (normal mode) ON/OFF 1 pumpC, S1 ON/OFF 2 pumpsC, S2 ON/OFF 3 pumpsC, S3 DLA71...3P (full mode) ON 1 pumpC, S1 ON 2 pumpsC, S2 ON 3 pumpsC, 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 OutputDLA71...2P 2 x SPST NO relay DLA71...3P 3 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 (03.06.10)1
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