Siemens SIMATIC S7-1500 Digital Input Module DI 16 x 24V DC, Type 3, Diagnostics, Isochronous Mode, IP20

Unlike standard digital input modules, the SIMATIC S7-1500 DI 16 x 24V DC brings deterministic isochronous operation and deep diagnostic insight to high-speed automation. Its 16 Type 3 inputs, electrical isolation, and wide temperature tolerance make it a robust choice for demanding control cabinets.

Highlights

• 16 digital inputs, 24V DC, Type 3 according to IEC 61131
• Isochronous mode support for deterministic response times
• Integrated diagnostics: wire break, short circuit, supply voltage monitoring
• Channel-level status indicators for quick troubleshooting
• Reverse polarity protection and electrical isolation for enhanced safety
• Firmware update capability for future-proof operation

In daily use

Engineered for the SIMATIC S7-1500 series, this module integrates seamlessly into your control system, providing fast input delay of 3.2 ms and low power consumption. Its front connector (not included) allows flexible wiring, while the IP20 protection class suits installation in control cabinets. The module operates reliably in horizontal mounting from -25 to +60 °C and vertical mounting up to +50 °C, making it suitable for a wide range of industrial settings.

Full specifications

• Module type: Digital input module
• Product series: SIMATIC S7-1500
• Number of digital inputs: 16
• Input voltage: 24V DC
• Input type: Type 3 (IEC 61131)
• Input delay: 3.2 ms
• Input current (per channel): Typ. 2.5 mA
• Grouping of inputs: 16 channels in groups of 16
• Power consumption (from backplane bus): Max. 1.5 W
• Current consumption (from L+): Max. 40 mA
• Operating temperature (horizontal): -25 to +60 °C
• Operating temperature (vertical): -25 to +50 °C
• Protection class: IP20
• Diagnostics functions: Yes (wire break, short circuit, supply voltage monitoring)
• Isolation: Yes (between channels, backplane bus, load voltage)
• Firmware update: Yes
• Status indicators: Yes (per channel and diagnostics)
• Reverse polarity protection: Yes

Final note

With its compact design, advanced diagnostics, and isochronous capability, this module delivers reliable signal acquisition for 24V DC sensors and switches in high-speed automation environments.