The Siemens 6ES5491-0LB11 is a specialized hardware adaption capsule designed for the legacy SIMATIC S5 automation platform. Specifically engineered for the S5-115 series, this interface component facilitates the mechanical and electrical connection of modules originally designed for the S5-135U or S5-155U systems into an S5-115U rack. This bridging capability is vital for large-scale industrial facilities, such as power plants, steel mills, and chemical refineries, where maintaining legacy infrastructure is essential. By allowing the reuse of high-performance modules across different rack generations, the 6ES5491-0LB11 extends equipment lifecycles and reduces downtime during critical hardware maintenance.
This adaption capsule is primarily used in legacy Siemens S5-115U PLC environments to integrate specialized I/O or communication modules from the S5-135U/155U product lines. It is commonly found in heavy industrial control systems, automated manufacturing lines, and process control infrastructure.
| Model | 6ES5491-0LB11 |
| Brand | Siemens |
| Series | SIMATIC S5 |
| Module Type | Adaption Capsule |
| Capacity | Up to 2 modules |
| Operating Temperature | 0 to 55 deg C |
| Storage Temperature | -40 to 70 deg C |
| Tariff Code | 8537109070 |
It acts as a mechanical and electrical bridge, allowing S5-135U/155U modules to be installed into an S5-115U rack system.
No, this component was discontinued as of October 2022 and is currently sourced as a legacy spare part.
Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.
Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.
We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.