Analog output modules provide 4 or 8 channels of voltage/current signals for controlling actuators in an RSTi‑EP system. They are compact (about 120 × 11.5 × 76 mm), snap onto DIN rails with a double‑click and carry an IP20 rating. Up to 64 I/O modules can be installed per station, but total throughput depends on data size and network speed. While these modules are easy to install, they offer limited resolution and lack features like channel isolation found in higher‑end analog output cards; evaluate whether they meet your accuracy requirements.