SIMATIC S7-1500 SM 521 digital input modules come in 16-, 32- and 64-channel versions as 24 V DC HF, HS and BA and 230 V AC BA types, with sinking and sourcing options. The 35 mm modules offer parameters and diagnostics, while 25 mm modules are an economical choice for tight spaces.
Technical data
| Product | SM 521 digital input modules |
|---|---|
| Product family | SIMATIC S7-1500 |
| Example version | SM 521 digital input modules Module width 35 mm SIMATIC S7-1500, digital input module DI 16x 24 V DC HF 16 channels in groups of 16; of which 2 inputs can be used as counters; input delay 0.05..20 ms; input type 3 (IEC 61131); diagnostics; hardware interrupts: order front connectors (screw terminals |
| Number of article numbers | 23 |
Article numbers
| Version | Description | Article No. |
|---|---|---|
| Standard | SM 521 digital input modules Module width 35 mm SIMATIC S7-1500, digital input module DI 16x 24 V DC HF 16 channels in groups of 16; of which 2 inputs can be used as counters; input delay 0.05..20 ms; input type 3 (IEC 61131); diagnostics; hardware interrupts: order front connectors (screw terminals or push-in) separately | 6ES7521-1BH00-0AB0 |
| Standard | SIMATIC S7-1500, digital input module DI 32x 24 V DC HF 32 channels in groups of 16; of which 2 inputs can be used as counters; input delay 0.05..20 ms input type 3 (IEC 61131); diagnostics; hardware interrupts: order front connectors (screw terminals or push-in) separately | 6ES7521-1BL00-0AB0 |
| Standard | SIMATIC S7-1500, digital input module DI 16x24 V DC HS 16 channels in groups of 8; for 24 V encoders; 24 V DC sensor supply; input type 2 (IEC 61131); input delay parameterizable 0.05..20 ms; isochronous mode up to 250 μs; integr. counting function up to 20 kHz; pulse stretching; flutter monitoring; signal inversion diagnostics; hardware interrupts: order front connectors (screw terminals or push-in) and, if required, shielding set separately | 6ES7521-7BH00-0AB0 |
| Standard | SIMATIC S7-1500, digital input module, DI 64x 24 V DC SNK/SRC BA 64 channels in groups of 16, input delay typ. 3.2 ms, input type 3 (IEC 61131); sinking/sourcing input. 35 mm wide, cable and terminal blocks to be ordered separately as accessories | 6ES7521-1BP00-0AA0 |
| Standard | SIMATIC S7-1500, digital input module DI 16x 24 V DC BA, sourcing input 16 channels in groups of 16; input delay 3.2 ms; input type 3 (IEC 61131): order front connectors (screw terminals or push-in) separately | 6ES7521-1BH50-0AA0 |
| Standard | SIMATIC S7-1500, digital input module DI 16x 230 V AC BA 16 channels in groups of 4; input delay 20 ms; input type 1 (IEC 61131): order front connectors (screw terminals or push-in) separately | 6ES7521-1FH00-0AA0 |
| Standard | SIMATIC S7-1500, digital input module DI 16x 24...125 V UC HF 16 channels in groups of 1; input delay 0.05..20 ms; input type 3 (IEC 61131); diagnostics; hardware interrupts: order front connectors (screw terminals or push-in) separately | 6ES7521-7EH00-0AB0 |
| Standard | SIMATIC S7-1500, digital input module DI 16xNAMUR HF 16 channels in groups of 8; for 8.2 V NAMUR encoders; 8.2 V sensor supply; input delay; parameterizable 0.05 ... 20 ms; integr. counting function up to 20 kHz pulse stretching; flutter monitoring; signal inversion diagnostics; hardware interrupts; all components required for shielding are included in the scope of delivery; please order front connector (screw terminals or push-in) separately | 6ES7521-7TH00-0AB0 |
| Standard | Module width 25 mm; front connector (push-in) included in scope of delivery SIMATIC S7-1500, digital input module DI 16x 24 V DC BA 16 channels in groups of 16, input delay typ. 3.2 ms, input type 3 (IEC 61131); delivery incl. push-in front connector | 6ES7521-1BH10-0AA0 |
| Standard | SIMATIC S7-1500, digital input module DI 32x 24 V DC BA 32 channels in groups of 16, input delay typ. 3.2 ms, input type 3 (IEC 61131); delivery incl. push-in front connector | 6ES7521-1BL10-0AA0 |
| Standard | SIMATIC S7-1500, front connector screw- type connection system 40-pin for 35 mm wide modules including 4 jumper links and cable ties | 6ES7592-1AM00-0XB0 |
| Standard | SIMATIC S7-1500, front connector with push-in technology 40-pin, for 35 mm wide modules including 4 jumper links and cable ties | 6ES7592-1BM00-0XB0 |
| Standard | SIMATIC S7-1500, spare part jumper links For front connectors for 35 mm wide IO modules; can be used for all 24 V DC modules; 20 units per packing unit; Note: not suitable for 230 V, not suitable for analog modules | 6ES7592-3AA00-0AA0 |
| Standard | DIN A4 labeling sheets SIMATIC S7-1500, labeling sheets for 35 mm Wide S7-1500 modules, color: AL gray; material: film, perforated; suitable for printing with commercially available laser printers; 10 sheets of 10 strips per packing unit sufficient for 100 modules | 6ES7592-2AX00-0AA0 |
| Standard | SIMATIC S7-1500, labeling sheets for 25 mm Wide S7-1500 modules and compact CPUs, color: AL gray; material: film, perforated; suitable for printing with commercially available laser printers; 10 sheets of 20 strips per packing unit sufficient for 200 modules | 6ES7592-1AX00-0AA0 |
| Standard | SIMATIC S7-1500, spare part, U-connector For connecting I/O modules; self-assembling backplane bus 5 units per packing unit | 6ES7590-0AA00-0AA0 |
| Standard | Universal front door for I/O modules SIMATIC S7-1500, spare part front door for 35 mm Wide IO modules; consisting of: * front door (unlasered), * labeling strips (front) * cabling diagram, 5 units per packing unit | 6ES7528-0AA00-7AA0 |
| Standard | SIMATIC S7-1500, spare part front door for 25 mm Wide IO modules; consisting of: * front door (unlasered), * labeling strips (front) * cabling diagram, 5 units per packing unit | 6ES7528-0AA00-0AA0 |
| SIPLUS | SIPLUS SM 521 digital input modules (Extended temperature range and exposure to environmental substances) 16 inputs, 24 V DC, isolated, parameterizable diagnostics and hardware interrupts | 6AG1521-1BH00-7AB0 |
| SIPLUS | 32 inputs, 24 V DC, isolated, parameterizable diagnostics and hardware interrupts | 6AG1521-1BL00-7AB0 |
| SIPLUS | 16 inputs, 24 V DC, isolated, input delay 3.2 ms | 6AG1521-1BH50-7AA0 |
| SIPLUS | 16 inputs, 230 V AC, isolated, input delay 20 ms | 6AG1521-1FH00-7AA0 |
| SIPLUS | 16 inputs, 48 ... 125 V UC, input delay 0.05 ... 20 ms, parameterizable diagnostics and hardware interrupts | 6AG1521-7EH00-7AB0 |
Technical data and article numbers are based on Siemens catalog ST 70 · 2026 (chapter SIMATIC S7-1500) and are for information only. Image is representative.
For price, stock and lead time, use the Request a Quote button or call +90 533 945 27 94. Sending the article number is enough.
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