Analog Devices CM-1-335 Isolated Current Input Conditioning Module

Analog Devices CM-1-335 Isolated Current Input Conditioning Module is a single‑channel signal conditioner that accepts a 4–20 mA current loop input and delivers an isolated, conditioned signal to downstream electronics. Designed for industrial environments, the module provides galvanic isolation between the current loop and the receiving circuitry, helping protect controllers and instrumentation from ground differences and transient disturbances while preserving the integrity of the measurement. The CM‑1‑335 designation is associated with Analog Devices’ legacy line of current‑input conditioning modules (including the model often cataloged as 18093 in used listings), which are commonly employed to interface analog sensors and transmitters with PLCs, data acquisition systems, or other high‑impedance inputs that require a clean, isolated current signal. In typical applications, engineers use this type of module to connect process transmitters and remote sensors to control or monitoring hardware where loop‑powered or externally powered current inputs must be isolated from the rest of the system. By conditioning the 4–20 mA input within an isolated channel, the CM‑1‑335 helps maintain signal fidelity and system safety in environments with electrical noise, voltage transients, or potential differences between equipment located on separate ground references.