6ES7451-3AL00-0AE0

**6ES7451-3AL00-0AE0** 

**Data sheet** 

SIMATIC S7-400, positioning module FM 451 for rapid/slow traverse drives, 3 channels incl. configuration package on CD 

||<br>5<br>Figure similar|SIMATIC S7-400, positioning module FM 451 for rapid/slow traverse drives, 3<br>channels incl. configuration package on CD|
|---|---|
|**Supply voltage**||
|Rated value(DC)|24 V|
|**Input current**||
|Current consumption, typ.|550 mA|
|**Encoder supply**||
|5 V encoder supply||
|● 5 V|Yes|
|● Output current, max.|210 mA|
|● Cable length, max.|35 m; at max. 210 mA|
|24 V encoder supply||
|● 24 V|Yes|
|● Output current, max.|300 mA|
|● Cable length, max.|100 m; at max. 300 mA|
|Absolute encoder(SSI)encoder supply||
|● Absolute encoder(SSI)|Yes|
|● Type of output voltage|24 V DC|
|● Output current, max.|300 mA|
|● Cable length, max.|300 m; At max. 156 kbit/s|
|**Power loss**||
|Power loss, typ.|3.6 W|
|**Digital inputs**||
|Number of digital inputs|12; 4per axis|
|Functions|Reference cams, reversing cams, flying actual value setting, start/stop<br>positioning|
|Input voltage||
|● Rated value(DC)|24 V|
|● for signal "0"|-30 to +5 V|
|● for signal "1"|+11 to +30V|
|Input current||
|● for signal "0", max.(permissiblequiescent current)|1.5 mA|
|● for signal "1", typ.|9 mA|
|**Digital outputs**||
|Number of digital outputs|12; 4per axis|
|Functions|Rapid traverse, creep, run right, run left|
|Short-circuitprotection|Yes|
|Output voltage||
|● for signal "1", min.|UP -3 V|
|Output current||



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|● for signal "1"permissible range for 0 to 55 °C, max.|600 mA; with UPmax|600 mA; with UPmax|600 mA; with UPmax|
|---|---|---|---|
|● for signal "0" residual current, max.|0.5 mA|||
|**Encoder**||||
|Connectable encoders||||
|● Incremental encoder(symmetrical)|Yes|||
|● Incremental encoder(asymmetrical)|Yes|||
|● Absolute encoder(SSI)|Yes|||
|Encoder signals, incremental encoder(symmetrical)||||
|● Trace mark signals|A, notA, B, notB|||
|● Zero mark signal|N, notN|||
|● Input voltage|5 V difference signal(phys. RS 422)|||
|● Input frequency, max.|1 MHz|||
|Encoder signals, incremental encoder(asymmetrical)||||
|● Trace mark signals|A, B|||
|● Zero mark signal|N|||
|● Input voltage|24 V|||
|● Input frequency, max.|50 kHz; for 25 m cable length, 25 kHz for 100 m cable length|||
|● Cable length, shielded, max.|100 m|||
|Encoder signals, absolute encoder(SSI)||||
|● Input signal|5 V difference signal(phys. RS 422)|||
|● Data signal|DATA, notDATA|||
|● Clock signal|CL, notCL|||
|● Telegram length,parameterizable|13 or 25 bit serial|||
|● Clock frequency, max.|1.25 MHz|||
|● Graycode|Yes|||
|● Cable length, shielded, max.|300 m; At max. 156 kbit/s|||
|**Potential separation**||||
|Potential separation digital inputs||||
|● Potential separation digital inputs|Yes|||
|Potential separation digital outputs||||
|● Potential separation digital outputs|Yes|||
|**Ambient conditions**||||
|Ambient temperature duringoperation||||
|● min.|0 °C|||
|● max.|55 °C|||
|Ambient temperature duringstorage/transportation||||
|● min.|-40 °C|||
|● max.|70 °C|||
|**Connection method**||||
|required front connector|1x 48-pin|||
|**Dimensions**||||
|Width|50 mm|||
|Height|290 mm|||
|Depth|210 mm|||
|**Weights**||||
|Weight, approx.|1 300g|||
|**Classifications**||||
|||**Version**|**Classification**|
||eClass<br>eClass<br>eClass<br>eClass<br>eClass<br>eClass<br>eClass<br>ETIM<br>ETIM|14<br>12<br>9.1<br>9<br>8<br>7.1<br>6<br>10<br>9|27-24-22-05<br>27-24-22-05<br>27-24-22-05<br>27-24-22-05<br>27-24-22-05<br>27-24-22-05<br>27-24-22-05<br>EC001422<br>EC001422|



||**Version**|**Classification**|
|---|---|---|
|eClass|14|27-24-22-05|
|eClass|12|27-24-22-05|
|eClass|9.1|27-24-22-05|
|eClass|9|27-24-22-05|
|eClass|8|27-24-22-05|
|eClass|7.1|27-24-22-05|
|eClass|6|27-24-22-05|
|ETIM|10|EC001422|
|ETIM|9|EC001422|



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Subject to change without notice © Copyright Siemens 

5/18/2026 

ETIM 8 EC001422 ETIM 7 EC001422 IDEA 4 3567 UNSPSC 15 32-15-17-05 ~~a~~ **Approvals / Certificates General Product Approval** ce Miscellaneous UKco © fc **General Product Approval EMV For use in hazardous locations** ~~—~~ China RoHS Miscellaneous ~~—~~ — Be & €) **For use in hazardous locations Maritime application** FM Type Examination Certificate **Maritime application** - NK / Nippon Kaiji Ky okai ~~= —~~ 9 # **Maritime application** - CCS (China Classifica tion Society) **last modified:** 6/7/2025 C] 

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Subject to change without notice © Copyright Siemens 

5/18/2026