Product Overview
The Siemens 6ES5314-3UR11 is a specialized IM 314R interface module belonging to the world-renowned SIMATIC S5 programmable logic controller family, purpose-engineered to serve as the decentralized expansion-side communication bridge in Siemens S5-155H and S5-115H high-availability redundant control systems. Unlike conventional IM 301 or IM 305 interface modules used in standard S5-115U/135U/155U architectures, the Siemens 6ES5314-3UR11 is explicitly designed for the “R” – redundant, switched I/O configuration that underpins S5-155H/115H dual-controller hot-standby systems. As confirmed by Siemens’ official Industry Mall records, the Siemens 6ES5314-3UR11 is described as “SIMATIC S5, Connection IM 314R (In expansion unit) for decentral connection up to 600m from ED to CD for AG S5-155H, -115H” – meaning it is installed in the Expansion Device (ED/EU) and establishes a decentralized link of up to 600 meters back to the Central Device (CD/CC).
The core mission of the Siemens 6ES5314-3UR11 is to enable geographically distributed I/O configurations where the expansion unit physically resides up to 600 meters away from the central controllers, connected via Siemens’ dedicated 721 series shielded bus cable. Within an S5-155H redundant architecture, two IM 304 modules are plugged into the two central controllers (Controller A and Controller B), while two Siemens 6ES5314-3UR11 modules are installed in each expansion unit, forming a switched, single-channel peripheral configuration that ensures I/O availability even during a controller failover. The Siemens 6ES5314-3UR11 draws its operating power directly from the 5V DC backplane bus, consuming a maximum of 1.0A, and occupies 1⅓ standard S5 module slot widths with a net weight of 0.499 kg.
Siemens has officially declared the Siemens 6ES5314-3UR11 as discontinued without replacement since October 1, 2022, making it a purely obsolescence-managed spare part. However, it remains an absolutely mission-critical component in countless operational S5-155H/115H high-availability installations worldwide – particularly in power generation balance-of-plant systems, water and wastewater main lift stations, automotive body shop sub-lines, and legacy process skids where the cost of migrating to S7-400/S7-1500 redundant platforms cannot be easily justified. The Siemens 6ES5314-3UR11 ships from Germany with commodity code 85389091, and its continued availability through specialized industrial automation spare parts suppliers ensures that investments in S5-155H/115H-based high-availability automation can be protected and maintained for decades to come. For facility managers and maintenance engineers responsible for sustaining these redundant S5 systems, the Siemens 6ES5314-3UR11 represents a lifeline – a tested, warrantable spare part that can be dropped into an existing expansion unit to restore full decentralized I/O communications in a matter of minutes.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6ES5314-3UR11 |
| Manufacturer | Siemens AG |
| Product Type | IM 314R Interface Module (Redundant/Decentralized) |
| Series | SIMATIC S5 › S5-155H/115H High-Availability Systems |
| Core Function | Decentralized connection between Expansion Device (ED/EU) and Central Device (CD/CC) |
| Applicable Systems | SIMATIC S5-155H, S5-115H (redundant high-availability controllers) |
| Installation Location | In the Expansion Unit (EU), paired with IM 304 in the Central Controller |
| Max Transmission Distance | 600 meters (via Siemens 721 series shielded bus cable) |
| Paired Module | IM 304 (installed in both central controllers A & B) |
| Current Consumption | Max. 1.0A @ 5V DC (backplane powered) |
| Front Connector | 50-pin D-Sub (Panel X4) |
| Slot Width | 1⅓ standard S5 module slots |
| Adapter Casing | 6ES5 491-0LA12 (for replacement) |
| Terminating Connector | 6ES5 760-1AA11 |
| Connecting Cable | Siemens 721 series dedicated bus cable |
| Max Connected EUs per Line | Up to 4 expansion units per IM 304 line |
| Max Total EUs | Up to 16 expansion units (8 lines × 2 controllers) |
| Net Weight | 0.499 kg |
| Commodity Code | 85389091 |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -40°C to +70°C |
| Protection Class | IP20 (control cabinet installation required) |
| Country of Origin | Germany |
| Product Status | Discontinued without replacement since October 1, 2022 (Siemens PM500) |
| RoHS Compliance | Not RoHS-compliant (legacy S5 product) |