The Siemens SIMATIC S7 1500 Digital Input Module S7-1500 6ES7521-1FH00-0AA0 DI 16x230VAC BA is a high-density 24 V DC digital input (DI) module designed for reliable signal acquisition in modern industrial automation systems. It is used to detect and process digital signals from sensors, switches, push buttons, and other field devices.
Engineered for seamless integration with SIMATIC S7-1500 PLC systems, this module ensures fast signal processing, high noise immunity, and long-term operational reliability. Fully configurable in TIA Portal, it supports efficient engineering, diagnostics, and scalable system expansion.
This digital input module is widely used in machine automation, production lines, process plants, material handling systems, and OEM control panels, where accurate and stable digital signal detection is critical.
| Parameter | Specification |
|---|---|
| Product Brand | Siemens |
| Product Series | SIMATIC S7-1500 |
| Product Type | Digital Input (DI) Module |
| Model | DI 32 × 24 V DC |
| Part Number | 6ES7521-1BH00-0AB0 |
| Input Voltage | 24 V DC |
| Number of Inputs | 16 Digital Inputs |
| Input Type | DC (Positive Logic) |
| Signal Type | Digital |
| Compatible PLC Series | SIMATIC S7-1500 |
| Configuration Software | TIA Portal |
| Diagnostic Functions | Channel & Module Diagnostics |
| Mounting Type | DIN Rail |
| Front Connector | Push-in / Screw Type (depending on version) |
| Operating Voltage (Backplane) | Supplied by S7-1500 system |
| Typical Use | Sensors, Switches, Push Buttons |
| Application Areas | Machine & Process Automation |
| Condition | New & Original |
| Country of Origin | Germany |
| Module Name / Description | Part Number (Order Code) |
|---|---|
| DI 16 × 24 V DC Standard | 6ES7521-1BH10-0AA0 / 6ES7521-1BH00-0AA0 |
| DI 32 × 24 V DC High Frequency | 6ES7521-1BL00-0AB0 |
| (multiple variants available with different characteristics) |
| Module Name / Description | Part Number (Order Code) |
|---|---|
| DO 8 × 24 V DC | 6ES7522-1BF00-0AB0 |
| DO 16 × 24 V DC | 6ES7522-1BH01-0AB0 |
| DO 32 × 24 V DC | 6ES7522-1BL10-0AA0 |
| (other variants include relay outputs or high-current versions) |
| Module Name / Description | Part Number (Order Code) |
|---|---|
| DI 16 + DO 16 Mixed Module | 6ES7523-1BL00-0AA0 |
| DI 16 + DO 16 Mixed Module (alternate) | 6ES7523-1BP50-0AA0 |
| (common combined digital I/O module options) |
| Module Name / Description | Part Number (Order Code) |
|---|---|
| AI 8 × Voltage/Current/RTD/TC | 6ES7531-7KF00-0AB0 |
| AI 8 × High-resolution Inputs | 6ES7531-7NF10-0AB0 |
| AI 16 × Inputs (various ranges) | 6ES7531-7MH00-0AB0 / 6ES7531-7LH00-0AB0 |
| AI 4 × Inputs | 6ES7531-7QD00-0AB0 |
| Module Name / Description | Part Number (Order Code) |
|---|---|
| AO 4 × Voltage/Current | 6ES7532-5HD00-0AB0 |
| AO 8 × High-Speed Outputs | 6ES7532-5HF00-0AB0 |
| AO 2 × Standard Outputs | 6ES7532-5NB00-0AB0 |
| AO 4 × Standard Outputs | 6ES7532-5NB00-0AB0 / 6ES7532-5ND00-0AB0 |
These modules combine both analog inputs and outputs in one module for mixed analog signal applications:
| Module Name / Description | Part Number (Order Code) |
|---|---|
| AI + AO Mixed Module (e.g., 4 AI + 2 AO) | 6ES7534-7QE00-0AB0 |
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