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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
- 1:1 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.
- 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.
DNV-GL marine certificate
EAC Ex certificate
|Operating temperature||-25°C to +70°C|
|Storage temperature||-40°C to +85°C|
|Relative humidity||< 95% RH (non-cond.)|
|Installation in||Pollution degree 2 & meas. / overvoltage cat. II|
|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...2.5 mm2 / AWG 26...12 stranded wire|
|Screw terminal torque||0.5 Nm|
|2...25 Hz||±1.6 mm|
|25...100 Hz||±4 g|
|Power dissipation, per channel||30 mW|
|Isolation voltage, test / working||2.5 kVAC / 300 VAC (reinforced)|
|Zone 2 / Div. 2||250 VAC|
|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|
|Measurement range||0...23 mA|
|Input voltage drop||(Unit voltage drop) + Vout.|
|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.)|
|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|
|FM, US||Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, AEx nA IIC T4|
|FM, CA||Cl. I, Div. 2, Gp. A, B, C, D T4 or Cl. I, Zone 2, Ex nA IIC T4|
|EAC Ex||2Ex nA IIC T4 Gc X|
Observed authority requirements
|EAC Ex||TR-CU 012/2011|
|ATEX||KEMA 10ATEX0147 X|
|c FM us||FM17US0004X / FM17CA0003X|
|EAC Ex||RU C-DK.HA65.B.00355/19|