Siemens 6ES5455-4UA12 Simatic S5 PLC Interface Module

Siemens 6ES5455-4UA12 is a SIMATIC S5 digital output module for the 455-series expansion, delivering 16 floating outputs to switch AC loads in the 24–60 VAC range, with a maximum of 2 A per output, in the compact U-version. Specifically designed for use with SIMATIC S5 135U/155U controllers, this module installs in the S5 rack to directly drive external devices from the PLC. Each of the 16 outputs is floating, meaning outputs are independently isolated, enabling separate control of connected loads without a common return line. The 6ES5455-4UA12 designation identifies the 455-4 family and aligns with 6ES5455-4UA12 on legacy Siemens S5 systems. Typical applications include control of AC-relay coils, small actuators, and other AC devices within automation cabinets where dense 16-channel output capacity is needed in a compact form factor.