⚙️ Product Overview
Siemens SIMATIC S7-1500 DI 16 x 24…125V UC HF is a high-feature universal digital input module with 16 input channels that can accept both AC and DC voltages in the range of 24 V to 125 V. The UC (Universal Current/Voltage) design allows connection of a wide variety of field signals, including 24 V DC sensors, 48/60 V DC signals, and 110/120 V AC control signals, reducing the need for separate AC and DC input modules. The HF version provides fast signal processing, configurable input filters, and advanced diagnostics at channel level. Fully integrated in TIA Portal, this module is ideal for mixed-voltage systems, retrofit projects, and complex automation systems where flexibility and high diagnostic capability are required.
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.
Product Specification Table
| Parameter | Specification |
|---|
| Product Brand | Siemens |
| Product Series | SIMATIC S7-1500 |
| Product Type | Digital Input (DI) Module |
| Model | DI 32 × 24 V DC |
| Part Number: | 6ES7521-7EH00-0AB0 |
| 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 |
✅ 1. S7-1500 Digital Input (DI) Modules
| 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) | |
✅ 2. S7-1500 Digital Output (DO) Modules
| 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) | |
✅ 3. S7-1500 Digital Input/Output (DI + DO) Modules
| 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) | |
✅ 4. S7-1500 Analog Input (AI) Modules
| 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 |
✅ 5. S7-1500 Analog Output (AO) Modules
| 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 |
✅ 6. S7-1500 Analog Input/Output (AI + AO) Modules
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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