Monitoring Relays DC Under Voltage Type DUA52 • DC undervoltage monitoring relay • Measuring if power supply is below the set level • Measures its own power supply • Measuring ranges: 8 - 28 V DC and 38 - 58 V DC • Adjustable hysteresis: 4 to 50% • Output: 5 A SPDT NE relay • For mounting on DIN-rail in accordance with DIN/EN 50 022 • 17.5 mm housing (DIN 43880) • LED indication for relay and power supply ON Product Description Ordering Key DUA 52 C 724 DUA52 is a voltage monitor- ing relay that measure its own power supply. The measuring ranges are 8-28 VDC and 38- 58 VDC. It has separate potentiometers for setpoint and hysteresis. Typical appli- cations are monitoring of backup batteries, batteries on diesel generator sets and the like. Housing Function Type Item number Output Power supply Type Selection Mounting OutputMeasuring rangeSupply : 12/24 VDC Supply: 48 VDC DIN-rail SPDT8 to 28 VDC DUA 52 C 724 DIN-rail SPDT38 to 58 VDCDUA 52 C 748 InputSpecifications Input (voltage level)Terminals A1, A2 Measures its own power supply Measuring ranges DirectLevel 48 VDC 38 to 58 VDC 12 to 24 VDC 8 to 28 VDC Output Specifications OutputSPDT relay Rated insulation voltage 250 VAC Contact ratings (AgSnO2) µ Resistive loadsAC 1 5 A @ 250 VAC DC 12 5 A @ 24 VDC Small inductive loads AC 15 2.5 A @ 250 VAC DC 13 2.5 A @ 24 VDC Mechanical life≥ 30 x 106 operations Electrical life≥ 105 operations (at 8 A, 250 V, cos ϕ = 1) Operating frequency ≤ 7200 operations/h Dielectric strength Dielectric voltage2 kVAC (rms) Rated impulse withstand volt. 4 kV (1.2/50 µs) Supply Specifications Power supplyOvervoltage cat. III Rated operational voltage(IEC 60664, IEC 60038) through terminals: A1 and A2 724 8 to 28 VDC 748 38 to 58 VDC Dielectric voltageNone Dielectric voltage Supply to output 2 kV Rated operational power 1.5 W Specifications are subject to change without notice (08.06.10)1
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