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3185
 
 

3185

 

Loop powered isolator

 

  • 1 or 2 channel input loop powered isolator
  • Signal 1:1 functional range 0...23 mA
  • Low input voltage drop and fast response time
  • Excellent accuracy and high load stability
  • Slimline 6 mm housing
  1. Overview +

  2. Technical details +

  3. Accessories +


Application

  • 1:1 input loop powered isolator of current signals in the range 0(4)...20 mA.
  • 3185 is an easy mounting DIN rail unit.
  • A very competitive choice in terms of both price and technology for galvanic isolation of current signals.
  • Provides surge suppression and protects control systems from transients and noise.
  • 3185 eliminates ground loops and can be used for measuring floating signals.
  • The device can be mounted in Safe area or in Zone 2 and Cl. 1 Div 2. area.

Technical characteristics

  • 3185 is powered by the analog input current signal loop.
  • Low input voltage drop, typ 1.35 V + Vout.
  • Excellent conversion accuracy, better than 0.1% in the range 0…20.5 mA.
  • Functional range is 0...23 mA which means that 3185 is NAMUR NE43 compliant.
  • Inputs and outputs are floating and galvanically separated.
  • The output is voltage limited to 17.5 VDC.
  • High galvanic isolation of 2.5 kVAC.
  • Fast response time < 5 ms.
  • Excellent signal/noise ratio > 60 dB.

Mounting / installation / programming

  • DIN rail mounting with up to 330 channels per meter.
  • Temperature operation range is from -25...+70°C.

Environmental Conditions

  • Operating temperature

    -25°C to +70°C

  • Storage temperature

    -40°C to +85°C

  • Calibration temperature

    20...28°C

  • Relative humidity

    < 95% RH (non-cond.)

  • Protection degree

    IP20

  • Installation in

    Pollution degree 2 & measurement / overvoltage cat. II

Mechanical specifications

  • Dimensions (HxWxD)

    113 x 6.1 x 115 mm

  • Weight approx.

    70 g

  • DIN rail type

    DIN EN 60715/35 mm

  • Wire size

    0.13 x 2.5 mm2 / AWG 26...12 stranded wire

  • Screw terminal torque

    0.5 Nm

  • Vibration

    IEC 60068-2-6

  • 2...25 Hz

    ±1.6 mm

  • 25...100 Hz

    ±4 g

Common specifications

  • Supply

  • Power dissipation, per channel

    30 mW

  • Isolation voltage

  • Isolation voltage, test / working

    2.5 kVAC / 300 VAC (reinforced)

  • Zone 2 / Div. 2

    250 VAC

  • Response time

  • Response time (0...90%, 100...10%)

    < 5 ms

  • Signal / noise ratio

    > 60 dB

  • Signal dynamics, input

    Analog signal chain

  • Signal dynamics, output

    Analog signal chain

  • Accuracy

    Better than 0.1%

  • Cut-off frequency (3 dB)

    100 Hz

  • EMC immunity influence

    < ±0.5% of span

  • Extended EMC immunity: NAMUR NE21, A criterion, burst

    < ±1% of span

Input specifications

  • Current input

  • Measurement range

    0...23 mA

  • Input voltage drop

    (Unit voltage drop) + Vout.

  • Signal conversion

    1:1

  • Start-up current, typ.

    10 uA

  • Current input overload, max.

    50 mA

  • Input to output voltage drop, typ.

    1.35 V + (0.015 x Vout.)

Output specifications

  • Current output

  • Signal range

    0...23 mA

  • Load (@ current output)

    ≤ 600 Ω

  • Load stability

    < 0.01% of span / 100 Ω

  • Voltage limit

    17.5 V

  • of span

    = 0...20 mA

I.S. / Ex marking

  • ATEX

    II 3 G Ex nA IIC T4 Gc

  • IECEx

    Ex nA IIC T4 Gc

  • FMus

    Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, AEx nA IIC T4

  • FMca

    Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, Ex nA IIC T4

Observed authority requirements

  • EMC

    2014/30/EU

  • LVD

    2014/35/EU

  • RoHS

    2011/65/EU

  • EAC

    TR-CU 020/2011

Approvals

  • ATEX 2014/34/EU

    KEMA 10ATEX0147 X

  • IECEx

    KEM 10.0068X

  • FM

    FM17US0004X / FM17CA0003X

  • DNV-GL Marine

    Stand. f. Certific. No. 2.4

  • UL

    UL 61010-1

  • CCOE

    P337347/1

  • EAC Ex TR-CU 012/2011

    RU C-DK.GB08.V.00410

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