Universal Input DIN Rail Signal Conditioner

DRI-U_SERIES

Temperature Input Signal Conditioner

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INVIA ORDINE

Accepts Thermocouple, RTD, Resistance and Voltage Input
AC (DRI-U-AC) or DC (DRI-U-DC) Powered Models
3-Way Isolation, Eliminates Ground Loops
Provides an Isolated DC Output in Proportion to the Input

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Descrizione

The DRI-U is a DIN rail mount signal conditioner for thermocouple, RTD, resistance or voltage inputs, with 1800V isolation between input, output and power. The user configurable input and output offers flexible, wide ranging capability for most temperature signal conditioning applications. The DRI-U is configured via DIP switch for Types J, K, T, E, R, S, B, N, or C thermocouples or Pt, Ni or Cu RTDs. Additionally, functions such as signal linearisation, up or down-scale burnout, number of RTD leads (2, 3 or 4) and voltage or current output are also set via dip-switches.

Accuracy and performance during warm-up and during changes in ambient temperature are maximized. The cold-junction compensation technique utilizes two temperature sensors to measure the differential temperature near the terminal block. Using heat transfer calculations with the measured differential temperature and the known thermal conductivity of the PCB, the terminal junction temperature is determined with extreme accuracy. Even during unstable thermal states such as start-up, ambient temperature changes or changing load or power, the DRI-U Series performs extremely accurate thermocouple temperature measurement.

Touch calibration technology allows easy field ranging for any of the thermocouple or RTD input types. For example, the dip-switch configured range for a J Type thermocouple is -210 to 760°C. Using a thermocouple simulator as a reference, the DRI-U could be ranged for 0 to 50°C or 0 to 500°C by simply applying the desired minimum and maximum input levels and pushing the range button to store the levels in non-volatile memory.

The factory default configuration for the DRI-U Series is as follows:

Input Type: Thermocouple, Type J
Input Range: 0 to 500°C
Burnout: Up-scale
Output Range: 4 to 20 mA

Specifications
INPUT
Input Types and Ranges: See tables
Impedance: ≥1.0 MΩ typical for thermocouple and voltage inputs
RTD Excitation: ≤ 0.3 mA
Burnout Detection: Upscale or downscale
CJC Error: ≤±0.1°C max (the output is ensured to be within ±0.5°C of rated accuracy 30 seconds after powering)

OUTPUT
Voltage:
    Range: DRI-U-AC; 0 to 10V: DRI-U-DC; 0 to 5V or 2 to 10V
    Drive: 10 mA (1000 Ω load min)
Current:
    Range: DRI-U-AC: 0 to 20 mA; DRI-U-DC; 0 to 20 mA, 4 to 20 mA
    Drive: 15V (750 Ω max)
Isolation: 1800 Vdc or peak AC between input, output and power
Configuration:
    Range: SW1: Push-button, input and output ranging
    Range: SW2: Linearisation, burnout, output (voltage or current), and initialization mode
    Range: SW3: Input type
Accuracy:
    Input A/D: See tables
    Linearisation: ≤±0.05% of accuracy range max
    Output: ≤±10 mA for current output; ≤±5 mV for voltage output
Thermal Stability:
    CJC: ±0.01°C/°C change in ambient max
    Zero: ±0.0075% of full scale/°C change in ambient max
    Span: ±0.0075% of full scale/°C change in ambient max
    Long Term: ±0.1% max over a 9 month period
Response Time: 400 msec, typical
Turn On Time: ≤5 seconds to establish output within 99% or 2°C of final value or 0.5°C within 30 seconds
LED Indicator:
    Power (Green): On when power is on, flashes for thermocouple burnout
    Input (Yellow): Flashes for out of range
    Red: Flashes for switch setting error
    Calibration: 1 green, 1 yellow and 1 red LEDs indicate steps in ranging process
Common Mode Rejection: 120 dB at DC, > 90 dB at 60 Hz
ESD Susceptibility: Capable of meeting IEC 801-2 level 3 (8 kV)
Humidity (Non-Condensing):
    Operating: 15 to 95% RH @ 45°C
    Soak: 90% RH for 24 Hours @ 60°C
Temperature:
    Operating: -25 to 65°C
    Storage: -25 to 70°C
Power:
    DRI-U-AC: 100 to 240 Vac ± 10%, 50 to 400 Hz; 2.5 W max
    DRI-U-DC: 9 to 30 Vdc ± 10%; 2.5 W max
Wire Terminal: Socketed screw terminals for 12 to 22 AWG
Weight: 227 g

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