Level and temperature switch with display NV 71D § Highly visible LED display indicates the switching outputs § High performance air breather with replaceable element § Optional air breather clogging indicator § Up to 4 programmable temperature switching outputs § Continuous temperature signal (adjustable current or voltage) plus one programmable switching output § Switching output adjustable as window or hysteresis § Two switching outputs adjustable as frequency output (1 to 100 Hz) § Menu structure based on the VDMA guidelines § Min/Max memory, logbook function Level and temperature switch NV 71 § Flange according to DIN 24557 Part 2 § High performance air breather with replaceable element § Optional air breather clogging indicator § Multiple connector options § Up to 4 level contacts or 2 switching outputs for level plus RTD or analogue output for temperature § Reliable dynamic float system § Probe length up to 1.5 m (longer on request) § Up to 230 V applicable Bühler Technologies GmbH D - 40880 Ratingen, Harkortstr. 29 Tel.: + 49 (0) 2102 / 49 89-0 Fax: + 49 (0) 2102 / 49 89-20 Internet: www.buehler-technologies.com e-mail: [email protected]

Technical data Basic units max. operating pressure operating temperature min. density of fluid Function switching point °C tolerance max. hysteresis 1 bar -20 °C to +80 °C 0.80 kg/dm³ / SK 610 0.85 kg/dm³ / SK 221 280, 370, 500 (standard) variable up to max. 1500 MS 790 g 30 g Temperature sensor tolerance Air breather filter grade of filtration accessories NC= normally open / NO = normally closed (at low temperature) other temperatures & designs with 2 x TK contacst on request HY Type Hydac BF 7 3 µm filling protection cover Temperature transmitter KT sensor element Pt 100 class B, DIN EN 60751...

B C Options / Accessories VS = clogging indicator Service Indicator BFA** = filling adapter SSR** = stilling tube with filling adapter MT = for Multiterminal MTS = for Multiterminal incl. stilling tube FCT = Fluidcontrolterminal Design MS brass VA* float and immersion tube stainless steel Connector M3 S6 M12 2M12 Lengths (max. 1500 mm) 280 370 500 other lengths (please specify) Level contact K = NC/NO W = change over Description Connecting cable M12x1, 1,5 m, elbow connector (female) and straight connector (male) Connecting cable M12x1, 3,0 m, elbow connector (female) and straight connector (male)...

Technical Data Basic units max. operating pressure operating temperature min. density of fluid The following temperature outputs are available: -2T connector (base) max. contact load PNP transistor output, max. current PNP output sustained short-circuit proof 1 bar -20 °C to +80 °C 0.80 kg/dm³ / SK 610 0.85 kg/dm³ / SK 221 280, 370, 500 (standard) variable to max. 1500 Air breather filter grade of filtration accessories -1T-KT connector (base) max. contact load PNP transistor output, max. Current PNP output analogue output HY Typ Hydac BF 7 3 µm filling protective cover immersion tube flange/...

Series Nivovent NV 71D-HY Design MS brass VA* float and immersion tube stainless steel Options / Accessories VS = clogging indicator Service Indicator BFA** = filling adapter SSR** = stilling tube with filling adapter O MT = for Multiterminal MTS = for Multiterminal incl. stilling tube FCT = Fluidcontrolterminal P Length (max. 1500 mm) Variable (please quote) -2T LED temperature indicator 2 x temperature outputs # level contacts 1K or 2K K = NO/NC -4T LED temperature indicator 4 x temperature outputs Position L1=...mm 1st level contact -1T-KT LED temperature indicator 1 x temperature output 1...

Standard pin assignment NV 71 Connector only level contact(s) Type K10 only level contact(s) Type W11 level contact(s) Type K10 and temperature level contact(s) Type K10 and 2 temp. contacts level contact(s) Type W11 and Pt100 (RTD) level contact(s) Type W11 and temperature level contact(s) Type K10 and Pt 100 (RTD) level contact Type W11 and 2 temp. contacts TK/TM = Thermo switch other configurations on request Options / Accessories visual clogging indicator for the air breather: analog underpressure indicator, display range 0.35 bar. filling adapter incl. ribbed flange with sieve insert: this...