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Technical specifications for 6ES5312-3AB31
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Manufacturer:Siemens
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Product Category:PLC Systems
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Spare Part Number:6ES5312-3AB31
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Estimated shipping dimensions:2x19.3x24.5cm
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Weight:0.76 kg
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Tariff Code:8537101190
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Counliy of origin:Germany
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Module type:IM312-3 expansion-unit interface
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Configuration:Centralized
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Expansion units:EU 183U / EU 185U with I/O modules only
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Controller-side interface:IM300-3 6ES5300-3AB11 or IM301-3 6ES5301-3AB13
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Connecting cable:Fixed to the IM312 module
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Cable length:0.95 m for the 3AB31 execution
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Final-line terminator:6ES5760-0AB11 on the last IM312-3
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Maximum line length:2 m from controller IM to final expansion-unit IM
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Supported I/O classes:DI, DO, AI, AO and some intelligent I/O modules
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EU 183U slot context:IM312-3 expansion-unit interface position
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Acceptance basis:Identity, cable route, termination and I/O response
Information
Overview
Manuals
Common Applications
Product Precautions
Within a centralized SIMATIC S5 rack arrangement, Siemens 6ES5312-3AB31 carries the expansion-bus connection from the central-controller interface into an I/O expansion unit.
- Provides the IM312-3 expansion-unit interface for a centralized SIMATIC S5 configuration.
- Connects the documented EU 183U or EU 185U I/O expansion-unit arrangement.
- Uses a fixed 0.95 m connecting cable on the complete 3AB31 execution.
- Requires terminator 6ES5760-0AB11 when it is the last IM312-3 in the line.
The documented connection chain uses an IM300-3 or IM301-3 at the central controller and keeps the line from that interface to the final expansion-unit interface within 2 m.
Important Notice: preserve the complete 6ES5312-3AB31 suffix, connected expansion-unit position, fixed cable route and final terminator placement before energization.
Siemens 6ES5312-3AB31 Manuals & Downloads
Siemens 6ES5312-3AB31 Official System Manual Excerpt (PDF)Siemens 6ES5312-3AB31 Installation & Commissioning Guide (PDF)
The official excerpt preserves the exact centralized-configuration, termination and expansion-unit pages; the separate field guide organizes installation, verification and handover checks.
Centralized S5 expansion
Extends the central-controller interface into an EU 183U or EU 185U I/O position.
Legacy rack replacement
Restores the exact IM312-3 position while retaining the fixed cable and terminator arrangement.
I/O expansion maintenance
Supports controlled checks of the connected digital, analog and approved intelligent I/O modules.
Configuration fault isolation
Separates controller-interface, cable, terminator and expansion-unit response during diagnosis.
Apply these checks to the exact Siemens 6ES5312-3AB31 installation before isolation, replacement or release.
1
Confirm the complete Siemens 6ES5312-3AB31 marking and IM312-3 role before work.
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Place the controller and every affected expansion-unit circuit in the approved maintenance state.
3
Record the central-controller interface, expansion-unit position and all installed I/O modules.
4
Protect the fixed 0.95 m cable from twisting, crushing or unapproved extension.
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Verify that the receiving unit is the documented EU 183U or EU 185U I/O arrangement.
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Fit 6ES5760-0AB11 when this module is the last IM312-3 in the centralized line.
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Keep the controller-interface to final expansion-unit interface path within 2 m.
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Review diagnostics and functionally verify every affected I/O point before service release.
Alternative Names
Siemens 6ES5 312-3AB31 / IM312-3
Technical notes
Keep Siemens 6ES5312-3AB31 de-energized while connecting the fixed cable. Verify the IM300-3 or IM301-3 controller-side interface, the final 6ES5760-0AB11 terminator and the 2 m maximum route; after energization, review diagnostics and every affected I/O point.
FAQ View All FAQ
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What role does Siemens 6ES5312-3AB31 perform in a SIMATIC S5 system?It is the IM312-3 expansion-unit interface for a documented centralized SIMATIC S5 connection.
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Which expansion units are listed for Siemens 6ES5312-3AB31?The system manual lists EU 183U and EU 185U expansion units with I/O modules only.
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Is Siemens 6ES5312-3AB31 intended for centralized or distributed configuration?The exact module is listed in the centralized-configuration table.
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How is the connecting cable arranged on Siemens 6ES5312-3AB31?The connecting cable is fixed to the IM312 module rather than supplied as a separate loose cable.
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What cable length belongs to Siemens 6ES5312-3AB31?The complete 3AB31 execution uses the documented 0.95 m fixed cable.
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Which terminator is required when Siemens 6ES5312-3AB31 is the last IM312-3?The last IM312-3 requires Siemens terminator 6ES5760-0AB11.
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What maximum centralized line length applies to Siemens 6ES5312-3AB31?The line from the controller-side interface module to the final expansion-unit interface must not exceed 2 m.
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Which module classes can the connected expansion unit carry with Siemens 6ES5312-3AB31?The centralized arrangement generally supports DI, DO, AI, AO and some intelligent I/O modules in the expansion unit.
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