Siemens 6ES7521-1BH10-0AA0 SIMATIC S7-1500 SM 521 16DI 24V DC Module
The Siemens 6ES7521-1BH10-0AA0 is an SM 521 digital input module for SIMATIC S7-1500 systems. It provides 16 digital inputs at 24 V DC and includes a 40-pole push-in front connector.
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- US$ 184.60
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Description
Siemens 6ES7521-1BH10-0AA0
SIMATIC S7-1500 | SM 521 Digital Input Module | 16 × 24 V DC Inputs | BA Standard Input Module | Push-In Front Connector
Product Detailed Description
The Siemens 6ES7521-1BH10-0AA0 is an SM 521 digital input module designed for SIMATIC S7-1500 and ET 200MP automation systems. It provides 16 digital input channels operating at 24 V DC, allowing PLC controllers to acquire signals from industrial sensors, switches, push buttons and other field devices.The module features a Type 3 input characteristic according to IEC 61131, with a typical input delay of 3.2 ms. All 16 input channels are arranged in one group and use sinking input technology. The module includes a 40-pole push-in front connector and supports installation on the S7-1500 mounting rail.It is suitable for standard industrial signal acquisition and machine control applications where reliable digital input processing is required.
Technical Specifications
| Parameter | Specification |
| Brand | Siemens |
| Model | 6ES7521-1BH10-0AA0 |
| Product Type | Digital Input Module |
| Product Series | SIMATIC S7-1500 / ET 200MP |
| Module Designation | SM 521 DI 16 × 24 V DC BA |
| Number of Digital Inputs | 16 |
| Rated Input Voltage | 24 V DC |
| Input Type | Sinking input |
| Input Characteristic | Type 3, IEC 61131 |
| Input Delay | Typical 3.2 ms |
| Input Current at Signal 1 | Typical 2.7 mA |
| Signal 0 Input Voltage | -30 to +5 V DC |
| Signal 1 Input Voltage | +11 to +30 V DC |
| Channel Grouping | 16 channels in one group |
| Front Connector | 40-pole push-in, included |
| Diagnostics | RUN and ERROR LEDs; channel status LEDs |
| Protection Rating | IP20 |
| Dimensions (W × H × D) | 25 × 147 × 129 mm |
| Net Weight | Approx. 0.316 kg (Siemens commercial data); technical datasheet module weight approx. 0.230 kg |
| Country of Origin | Germany |
| Replacement Model | No direct successor confirmed |
This item is listed for catalogue and inquiry purposes. Availability, condition, revision, warranty coverage, and lead time are confirmed with each quotation.
New Surplus: All items are genuine brand-new, distributor ready-stock supplying. Please inform us if you have any inquiry or demand.
Important Application Note
This is a standard digital input module, not a safety-rated or high-speed input module. All 16 channels belong to one group and are not individually isolated. Confirm the input wiring, sensor output type and common-potential arrangement before installation.
Applications
| Industrial Automation & Control | Machinery & Equipment |
| • PLC digital signal acquisition | • Automated production machinery |
| • Sensor status monitoring | • Packaging machines |
| • Push-button signal processing | • Assembly equipment |
| • Limit switch monitoring | • Conveyor systems |
| • Distributed I/O configurations | • Material handling machinery |
| Power & Electrical Systems | Industrial Applications |
| • Electrical control cabinets | • Factory automation |
| • 24 V DC control circuits | • Manufacturing production lines |
| • PLC input signal interfaces | • Industrial process monitoring |
| • Machine control panels | • Automated equipment monitoring |
| • Industrial control wiring | • Production system integration |
Additional information
| Warranty : | 12 Month |
|---|---|
| Lead Time | Ready Stock |
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