Siemens 6ES5 318-8MC12 SIMATIC S5 IM 318-8 Interface Module
$ 78.08
Description
Siemens 6ES5 318-8MC12 SIMATIC S5 IM 318-8 Interface Module. System Compatibility: SIMATIC S5-135U, S5-155U, and S5-185U. The S5 backplane is sensitive to "hot-swapping.". Module Type: Interface Module (IM). The IM 318-8 serves as the "bridge" between the central rack and the expansion racks, allowing the PLC to communicate with I/O modules located further away. The Siemens 6ES5 318-8MC12 is a specific interface module from the legacy SIMATIC S5 family. Specifically, it is an IM 318-8 Interface Module used to connect expansion units to a central controller in an S5-135U or S5-155U system. Since the S5 series was officially discontinued by Siemens years ago, this part is now primarily found in the surplus and refurbished industrial market. Technical Specifications & Role The IM 318-8 serves as the "bridge" between the central rack and the expansion racks, allowing the PLC to communicate with I/O modules located further away. Module Type: Interface Module (IM) System Compatibility: SIMATIC S5-135U, S5-155U, and S5-185U. Connection: Used with 721-series interface cables. Function: It manages the signal transmission between the Central Controller (CC) and the Expansion Unit (EU). Distance: Typically supports distributed configurations where expansion racks are located within a short range (usually up to 1.5 meters depending on the cable used). Market Value & Sourcing Because these units are critical for maintaining older manufacturing lines, they hold significant value in the secondary market. Factor Status Availability Obsolete (Available as Refurbished or Surplus only) Condition Look for "New Old Stock" (NOS) or "Pulled/Tested" units. Key Inspection Point Check the front connector pins for any signs of corrosion or bending. Integration Tips Addressing: Ensure the DIP switches (if applicable on your specific rack configuration) are set correctly so the CPU recognizes the expansion I/O. Replacement: When swapping this module, ensure the system is completely powered down. The S5 backplane is sensitive to "hot-swapping." Step 7 Compatibility: Remember that while S5 hardware is old, it can often be integrated into newer TIA Portal environments using S5-S7 adapters or IM 308-C PROFIBUS modules if you are looking to modernize.
