Loop-Powered Isolator – PR Electronics 6185

Features

  • 1-, 2- and 4-channel galvanic isolation
  • Slimline channel width of less than 6 mm
  • No separate supply necessary
  • Low response time
  • High noise suppression
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Application

  • Galvanic separation of analog current signals.
  • Elimination of ground loops and measurement of floating signals.
  • A competitive choice in terms of both price and technology for galvanic isolation of current signals to SCADA systems or PLC equipment.
  • Especially useful in applications necessitating an unproblematic transmission of current signals according to NAMUR (sensor error detection).

Technical characteristics

  • PR 6185 is powered by the measured signal and loads the loop with max. 1.8 VDC.
  • The input is protected against overvoltage and polarity error.
  • The drop voltage for each channel can be calculated according to the following expression: Vdrop = 1.8 + (Iout. * Rload.
  • The output is voltage-limited to 15 VDC.
  • Inputs and outputs are floating and galvanically separated.

Mounting / installation

  • Mounted vertically or horizontally on a DIN rail. As the devices can be mounted without distance between neighboring units, up to 168 channels can be mounted per meter.

Specification

ENVIRONMENTAL CONDITIONS
Operating temperature -20°C to +60°C
Calibration temperature 20…28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP20
MECHANICAL SPECIFICATIONS
Dimensions (HxWxD) 109 x 23.5 x 104 mm
Weight approx. 155 / 180 / 230 g (1 / 2 / 4 channels)
DIN rail type DIN 46277
Wire size 1 x 2.5 mm2 stranded wire
Screw terminal torque 0.5 Nm
COMMON SPECIFICATIONS
Supply
Power dissipation, per channel 40 mW
Isolation voltage
Test voltage 2 kVAC
Response time
Response time (0…90%, 100…10%) < 4 ms
Voltage drop < 1.8 VDC, min. 1.8 V + (Iout.*Rload), max.
Signal / noise ratio Min. 60 dB (0…100 kHz)
Accuracy Better than 0.1% of sel. range
EMC immunity influence < ±0.5% of span
INPUT SPECIFICATIONS
Current input
Measurement range 0…23 mA
Input resistance ≈ 90 Ω + Rload (@ 20 mA)
OUTPUT SPECIFICATIONS
Current output
Signal range 0…23 mA
Min. signal range 1:01
Load (@ current output) ≤ 600 Ω
Load stability < 0.03% of span / 100 Ω
Current limit 50 mA
Voltage limit 15 VDC
of span = of the presently selected range
OBSERVED AUTHORITY REQUIREMENTS
EMC 2014/30/EU
EAC TR-CU 020/2011

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