Siemens 6ES5316-8MA11 Programmable Logic Controller Module

Siemens 6ES5316-8MA11 is the IM316 interface module for the SIMATIC S5 family, designed to connect a central S5 CPU to up to three expansion racks in S5-100U, ET 100U, or ET 200U configurations. It draws a typical 27 mA from a +9 V supply and measures 45.4 x 135 x 39 mm, with a weight around 120 g, making it a compact bridging unit for legacy automation setups. This module is a discontinued product—the manufacturer halted production on November 1, 1994—and it is commonly described as an IM316 interface device; some catalogs note that it was replaced by the 6ES5316-8MA12 revision while preserving core functionality. In typical S5 installations, IM316 interface modules enable expansion of I/O and inter-rack communication across multiple expansion rails.