The Siemens 6ES5318-8MB13 is an interface module for the Simatic S5 programmable controller series, providing expansion and communication capability between S5 CPU racks and peripheral I/O modules. It is designed for use in legacy Simatic S5 automation systems requiring reliable rack-to-rack interfacing. Key Benefits New condition — ready for immediate installation and commissioning Enables rack expansion and I/O interfacing in Simatic S5 systems Direct replacement or spare for existing S5 installations Siemens S5 series compatibility for seamless legacy system integration Reliable Siemens engineering for long-term industrial automation use Features Part Number: 6ES5318-8MB13 Type: Interface Module Compatible System: Siemens Simatic S5 Application: Rack expansion / peripheral I/O interfacing Manufacturer: Siemens Condition: New This is for 1 Unit What you see in the product images is exactly what you receive — no surprises. Note: Customs fees and import duties for international orders are the responsibility of the buyer.