Siemens 6ES7 135-4FB00-0AB0 Terminal Base

Siemens 6ES7 135-4FB00-0AB0 Terminal Base is a two-channel analog voltage output module (AO) for the SIMATIC ET 200S distributed I/O system. This 15 mm-wide module plugs into an ET 200S rack and provides two voltage outputs (U) with selectable ranges including +/-10 V and 1–5 V, delivering up to 13-bit resolution per channel and update times around 1 ms per channel for fast control loops. As part of the ET 200S family, it integrates with Siemens PLCs (S7-300/ET 200S) via the standard backplane interface, enabling direct analog control of actuators like valves or proportional controllers. The module is designed for 24 V DC field signals and is typically used in automation tasks that require two independent analog outputs to drive sensors, actuators, or analog signal conditioners; its compact footprint and 15 mm width support high-density installation on ET 200S racks in control cabinets. Typical applications include process control, valve positioning, and test rigs where precise voltage control on two channels is needed.