Product Description – Schneider STBDDI3725KS Digital Input Module

The Schneider STBDDI3725KS is a high-density digital input module for the Modicon Advantys STB distributed I/O system. It converts discrete field device signals, such as switches, sensors, and pushbuttons, into precise digital values for reliable PLC processing. Moreover, its compact DIN-rail design allows seamless integration into STB islands while conserving panel space. With 32 discrete inputs and fast response times, this module ensures accurate real-time control in industrial automation environments. Therefore, it is an ideal solution for packaging, bottling, textile, printing, and semiconductor machinery applications.

In addition, the module provides channel-to-bus isolation, built-in diagnostics, and error detection to improve operational reliability. Its compatibility with STBXBA3000 mounting bases and STBPDT3100/3105 power modules makes it flexible for scalable distributed control systems. Certified to international standards and IP20-rated, it delivers safe and robust performance in harsh industrial settings.

Technical Specifications

Electrical

• Channels: 32 digital inputs

• Input Type: 24 V DC, sink/source compatible

• Input Voltage Range: 19–30 V DC

• Input Current: 7 mA per channel at 24 V DC

• Isolation: Channel-to-bus isolation

• Response Time: <1 ms typical

• Supply Voltage: 24 V DC

Mechanical

• Mounting: DIN-rail (part of STB island)

• Dimensions (W × H × D): 125 × 65.1 × 18.4 mm

• Weight: 0.086 kg

• Terminal Type: Removable screw terminal block

Environmental

• Operating Temperature: 0–60 °C

• Storage Temperature: −40–85 °C

• Relative Humidity: 5–95% non-condensing

• Protection Rating: IP20

Compliance

• Standards: EN/IEC 61131-2 type 3, IEC 61000 (EMC)

• Certifications: CE, UL, CSA, FM Class 1 Division 2

• Sustainability: RoHS and REACh compliant

FAQ

Q1: How many digital inputs does this module support?
It provides 32 discrete inputs, suitable for high-density signal acquisition.

Q2: Is the module compatible with hot-swap operations?
Yes, it supports hot-swap fallback with standard network interface modules.

Q3: What is the operating temperature range?
The module operates safely from 0 °C to 60 °C with 5–95% non-condensing humidity.

Q4: Which systems is this module compatible with?
It integrates with Modicon Advantys STB distributed I/O islands and PLC controllers.

Q5: Does it include diagnostics for input errors?
Yes, built-in diagnostics detect open circuits, short circuits, and wiring faults.