DMA801 VAISALA | Alldatasheet

Document overview

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Technical content

Features

  • Allows connecting analog sensors to Vaisala Data Management Unit DMU801
  • One plug ‑ in module adds 4 differential analog inputs to the system
  • Converts analog signals into digital format with 24‑ bit resolution
  • Rejection filter for 50/60 Hz frequencies
  • 2 × 0–30 V single ‑ ended measurement channel
  • Sophisticated, software controllable sensor power control
  • Heating power connection with overcurrent and surge protection (surge protectors on baseboard)
  • Rugged lightning surge protection for all sensor connections For analog sensor interfaces Many sensors for measuring temperature, pressure, and solar radiation have analog interfaces. DMA801 provides analog channels and converts the analog data into digital format for DMU801. Analog inputs of DMA801 support Pt100, Pt1000, NTC thermistor, and voltage‑ out sensors such as pyranometers. 4–20 mA current loop measurement can be supported with an additional DCA420 adapter module or with external shunt resistor. Highly accurate DMA801 has unmatched accuracy and is thus well suited for various analog measurement applications. Rugged solution with internal surge protection DMA801 operates in a wide temperature range and withstands fast temperature changes. Because of its internal rugged surge protection (up to 3 kA), external surge protection is not required. Easy expansion when needed DMA801 is easy to install during initial system setup and can also be plugged in later to expand the selection of sensors. Several DMA801 modules can be plugged into the same DMU801 base unit, if needed. DMA801 can be configured with the intuitive, node‑ based Vaisala DMU801 Configuration Tool. Vaisala Analog Measurement Module DMA801 provides analog channels to Vaisala Data Management Unit DMU801. Each DMA801 includes 4 differential analog channels and 2 additional single‑ ended high voltage channels. Depending on the size of DMU801, it is possible to add up to 8 DMA801 modules to DMU801.

Temperature measurement (Pt100 sensor) 1) Measurement range −60 … +85 °C (−76 … +185 °F) Maximum error over −40 … +70 °C (−40 … +158 °F) < ±0.03 °C Maximum error over −60 … +85 °C (−76 … +185 °F) < ±0.04 °C Maximum error at 0 °C (+32 °F) 2) < ±0.01 °C Voltage measurement Uncertainty over temperature range −40 … +70 °C (−40 … +158 °F): ±2.5 V range < 0.05 % of reading ±1.85 μV ±1.25 V range < 0.04 % of reading ±2.3 μV ±620 mV range < 0.04 % of reading ±0.9 μV ±310 mV range < 0.04 % of reading ±0.75 μV ±156 mV range < 0.04 % of reading ±0.8 μV ±78 mV range < 0.04 % of reading ±1.25 μV ±39 mV range < 0.04 % of reading ±0.8 μV Uncertainty over temperature range −60 … +85 °C (−76 … +185 °F): ±2.5 V range < 0.05 % of reading ±1.85 μV ±1.25 V range < 0.04 % of reading ±2.3 μV ±620 mV range < 0.04 % of reading ±0.9 μV ±310 mV range < 0.04 % of reading ±0.85 μV ±156 mV range < 0.04 % of reading ±1.2 μV ±78 mV range < 0.05 % of reading ±1.25 μV ±39 mV range < 0.06 % of reading ±0.95 μV Common mode range +2.5 V / −0.9 V Voltage measurement 0–30 V Uncertainty over temperature range −40 … +70 °C (−40 … +158 °F): To be defined Uncertainty over temperature range −60 … +85 °C (−76 … +185 °F): To be defined 1) Verified by measuring ±20 °C from ambient temperature, while ambient temperature spreads across the entire range. 2) Verified with DMU801 at 0 °C (+32 °F). Operating environment Operating temperature −40 … +85 °C (−40 … +185 °F) Extended operating temperature (available on request) Storage temperature −60 … +85 °C (−76 … +185 °F) Operating humidity 0–100 %RH, non‑ condensing Powering specifications Sensor supply voltage 3–26 V, software controllable Current limit 0.7 A, −25 % … +20 % per port Sensor heating current limit 2 A per plug‑ in module Inputs and outputs Inputs • 4 × differential analog inputs

  • 2 × 0–30 V single-ended measurement channels
  • 2 × counter measurement channels Mating connectors 4 × Phoenix Contact DFMC 1,5/4‑ ST‑ 3,5‑ LR (included) Power output Each port has a separate, software controllable power output pin and a separate excitation pin Heating output Each port has separate heating power supply pins A/D conversion Low noise 24‑ bit A/D converter with internal diagnostics Mechanical specifications Dimensions (H x D) 123 × 79 mm (4.84 × 3.11 in) Distance between 2 plug‑ in module slots in DMU801 frame 18 mm (0.71 in) Weight 64 g (2.26 oz) Material UL‑ rated fire-resistive FR4 Handles Stainless steel Coating Conformally coated against humidity Compliance EU directives and regulations EMC, RoHS EMC immunity EN 61326‑ 1, industrial environment EMC emissions CISPR 32 / EN 55032, Class B FCC part 15 B, Class B ICES‑ 3 / NMB‑ 3 (Class B) Compliance marks CE, FCC, ICES, RCM, UKCA Test Applied standard Description/Value Maritime IEC 60945 – Vibration (sinusoidal) IEC 60068‑ 2‑ 6 5–13.2 Hz, 1 mm (0.04 in) amplitude 13.2–200 Hz, 0.7 g Rough handling IEC 60068‑ 2‑ 31 Drop height 100 cm (39.37 in) Shock IEC 60068‑ 2‑ 27 15 g, 11 ms, saw‑ tooth Dry heat IEC 60068‑ 2‑ 2 +85 °C (+185 °F) Damp heat IEC 60068‑ 2‑ 78 +40 °C (+104 °F), 95 %RH Cold IEC 60068‑ 2‑ 1 −60 °C (−76 °F) Published by Vaisala | B211831EN-F © Vaisala 2023 All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. Any reproduction, transfer, distribution or storage of information contained in this document is strictly prohibited. All specifications — technical included — are subject to change without notice. www.vaisala.com