PR 3185 Loop Power Isolator
Boost signal integrity and safety with the PR 3185 Loop Power Isolator. This compact, loop‑powered module isolates and converts current loop signals in one compact unit—no external power needed. Featuring top‑tier accuracy (< 0.1 %), fast response (< 5 ms), and reinforced isolation (2.5 kVAC), the PR 3185 protects your instrumentation from noise, ground loops, and transient spikes. Slim 6.1 mm design allows you to fit more channels in your existing panels. Certified for Zone 2, marine, and hazardous areas, it delivers dependable performance in demanding environments.
- Loop‑powered, eliminating external supply complexity
- Exceptional accuracy and fast response, even in noisy conditions
- Slim form factor & high isolation—perfect for high‑density mounting and safety‑critical installations
Description
The PR 3185 Loop Power Isolator offers efficient galvanic isolation and 1:1 signal conversion of standard current loop signals in a slim, space‑saving housing. Available as 1‑channel or 2‑channel units, it draws power directly from the loop, thus removing the need for external power supplies. The 3185, from PR electronics, features low input voltage drop (typical 1.35 V + Vout), excellent conversion accuracy (better than 0.1 % over 0-20.5 mA), fast response time (< 5 ms), and a strong signal‑to‑noise ratio (> 60 dB).
- 1 or 2 channel input loop power isolator
- Signal 1:1 functional range 0-23 mA
- Low input voltage drop as well as fast response time
- Excellent accuracy in addition to high load stability
- Slimline 6 mm housing
- DIN-rail mounting with up to 326 channels per meter
- Temperature operation range is from -13 to 158˚F (-25 to 70˚C)
PR 3185 Loop Power Isolator
The PR 3185 Loop Power Isolator supports floating, galvanically separated inputs and outputs. It also provides high isolation of 2.5 kVAC, and voltage‑limited outputs (max ~17.5 VDC). Thus, the 3185 ensures safety and integrity in challenging signal environments. With a compact design and narrow 6.1 mm housing, the PR 3185 Loop Power Isolator mounts densely on DIN-rails – up to 163 units per meter. Furthermore, it withstands high ambient temperatures: up to 158˚F (70˚C). The PR 3185 is certified for marine use as well as Safe Areas, Zone 2 / Div 2, ATEX, IECEx, UL, and more, thus making it suitable for harsh, regulated environments.
- 1:1 input loop-powered isolator of current signals in the range 0(4)-20 mA.
- The PR 3185 is an easy mounting DIN-rail unit.
- A very competitive choice in terms of both price as well as technology for galvanic isolation of current signals.
- Provides surge suppression and protects control systems from transients and noise.
- Eliminates ground loops and can also be used for measuring floating signals.
- This signal conditioning device can mount in Safe area or in Zone 2 and Cl. 1 Div 2. area.
Technical Characteristics
- The PR 3185 receives power through the analog input current signal loop.
- Low input voltage drop, typically 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 the PR 3185 is NAMUR NE43 compliant.
- Inputs and outputs are floating as well as 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.
Applications
- Isolation of current loops in process control panels feeding into PLCs, DCS or SCADA to prevent ground loops and noise interference.
- Use in oil and gas, chemical, water/wastewater, marine, or food & beverage sectors where explosion protection, signal robustness, and compliance matter.
- Retrofit applications in addition to space‑constrained panels where many channels are necessary with minimal footprint.
- Long cable runs or high‐electrical‑noise environments where high signal‑to‑noise ratio as well as galvanic isolation ensure accurate readings.
Brand
PR electronics
