This document introduces the 3B42 / 3B43 / 3B44 Rev. 0 series products from Analog Devices. The product is an AC sine wave input module used for industrial signal conditioning, isolation, and filtering. It utilizes AC averaging technique to rectify, amplify, and filter 50 Hz to 400 Hz sine wave signals. The module accepts inputs ranging from 20 mV to 550 V rms and provides an rms output reading. It also offers simultaneous precision voltage and current outputs. The module circuitry can withstand 130 V rms at the input screw-terminals. All 3B42, 3B43, and 3B44 series modules are mix-and-match and hot swappable.
The 3B42, 3B43 and 3B44 are single‑channel AC sine‑wave signal‑conditioning modules that use an AC averaging technique to rectify, amplify, and filter 50 Hz to 400 Hz signals. They accept inputs from 20 mV to 550 V rms and provide simultaneous precision voltage (0‑10 V) and current (4‑20 mA) outputs with up to 1500 V peak isolation. The modules are hot‑swappable, mix‑and‑match, and can be field‑calibrated via front‑panel zero and span adjustments.
The handbook includes model tables, pin‑out diagrams, mechanical dimensions (3.15" × 3.395" × 0.775"), environmental limits (‑28 °C to +85 °C), and detailed specifications such as accuracy (+0.05 % span), temperature stability (+0.005 % of span/°C), and input protection (220 V rms max).
| Input voltage range | 20 mV to 550 V rms |
|---|---|
| Output voltage range | 0 to +10 V |
| Output current range | 4‑20 mA (or 0‑20 mA) |
| Isolation voltage | 1500 V peak |
| Input protection voltage | 220 V rms max |
| Operating temperature range | -28 °C to +85 °C |
| Mechanical dimensions | 3.15" x 3.395" x 0.775" |
| Accuracy (voltage output) | +0.05 % span |
| Stability vs temperature | +0.005 % of span/°C |
They accept inputs from 20 mV up to 550 V rms.
Each module offers up to 1500 V peak isolation between input and output.
They are rated for operation from –28 °C to +85 °C.