2-wire current isolator 3186B1

Functional highlights

• 3186A is a 1:1 output loop-powered 2-wire transmitter isolator that excites and measures passive input signals.
• 3186B is a 1:1 output loop-powered 2-wire current isolator that measures active input signals.
• High 4-port isolation provides surge suppression that protects the control system from transients and noise and eliminates ground loops.
• The device can be mounted in Safe area or in Zone 2 / Division 2 areas and is approved for marine applications.

Technical highlights

• The device is powered by the host loop voltage.
• Excellent conversion accuracy, better than 0.05% in the range 3.8…20.5 mA.
• Fast response time < 5 ms.
• Wide supply range from 6...35 V.
• Low input to output voltage drop typ. 2.5 V (3186A).
• Low input drop ≤ 3 V (3186B), even when no loop power is applied to the output terminals.
• NAMUR NE21, NE43.
• Excellent signal/noise ratio > 60 dB.
• High galvanic isolation of 2.5 kVAC.
• Inputs and outputs are floating and galvanically separated.
• Wide ambient temperature range: -25...+70°C.

Mounting / installation

• The narrow 6.1 mm housing allows up to 163 units per meter.
• DIN rail mounting with up to 326 channels per meter.
• Units can be mounted side by side, horizontally and vertically, without air gap on a standard DIN rail, even at 70°C ambient temperature.

Is PR 3186B1 suitable for my signal?

PR 3186B1 is a single-channel galvanic current isolator. Version B accepts an active current input, while the output loop supplies operating power. Do not confuse it with version A, which excites and measures a passive input signal.

Official PR electronics documentation

Official PR 3186 family page (English)

Consult the manufacturer's Data sheet & Manuals section for the datasheet and manual. Check variant B1 and the manual version applicable to the actual device before wiring and commissioning.

Technical articles

• PR 3186B1: check the 4…20 mA loop supply before connecting to the PLC