Loop-Powered Isolator - PR Electronics 6185

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).

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.

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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