Acromag 150I-20-I-20 Loop Isolator

Acromag 150I-20-I-20 Loop Isolator is a two‑wire, loop‑powered 4–20 mA signal isolator that provides galvanic isolation between the input loop and the isolated output. It transfers a 4–20 mA signal across an electrical boundary with an output loop capable of driving a load in the 10 to 300 ohms range, enabling direct connection to common process sensors and transmitters without grounding issues. This model is listed as 150I‑20‑I‑20 (often referenced with WL114) and weighs about 0.44 lb, reflecting its compact DIN‑rail friendly form factor. Note that Acromag discontinued this variant; it is no longer manufactured, though it remains cataloged in secondary sources. All Acromag isolators share high‑potential isolation ratings (up to 1500 V AC for 60 seconds) and continuous common‑mode protection of 250 V AC or 354 V DC, helping prevent ground loops and voltage transients in industrial environments. The 150I‑20‑I‑20 device is suited for applications where a 4–20 mA signal must cross an electrical boundary—for example process monitoring, instrumentation interfaces, and data acquisition systems that require robust isolation between source and load.