Product Introduction
The Schneider STBDDI3725KS Basic Digital Input Kit is a core component of the Modicon STB distributed I/O solution. Designed for 24 V DC discrete signal acquisition, it delivers 16 reliable inputs in a compact, hot-swappable form factor. This kit includes the STBDDI3725 module, STBXTS1180 screw-type connector, and STBXBA3000 base, ensuring easy integration into existing control systems. Investing in the STBDDI3725KS reduces downtime through its hot-swap capability and robust insulation, offering a strong return on investment for industrial automation.
Technical Specifications
| Parameter |
Value |
| Discrete input number |
16 |
| Discrete input voltage type |
DC |
| Input voltage limits (state 1) |
11...30 V |
| Input voltage limits (state 0) |
-3...5 V |
| Discrete input current |
4.5 mA |
| Response time (off-to-on / on-to-off) |
2 ms / 2 ms |
| Protection type |
Integrated fuse (5 A), reverse polarity, resistor-limited input |
| Insulation (channel to logic bus) |
1500 V for 1 minute |
| Hot swapping |
Yes (for basic NIMs) |
| Supply voltage |
24 V DC |
| Current consumption (logic bus) |
100 mA at 5 V DC |
| Status LEDs |
1 green (RDY), 16 per-channel green (IN1-IN16) |
| Dimensions (H x W x D) |
18.4 mm x 125 mm x 65.1 mm |
| Weight |
0.086 kg |
| Operating temperature |
-25 to 70 °C (without derating) |
| Vibration resistance |
3 gn at 58...150 Hz (35mm DIN rail) |
| Shock resistance |
30 gn for 11 ms |
| Certifications |
CE, UL, FM Class 1 Div 2, CSA |
Industry Applications
The Schneider STBDDI3725KS excels in material handling, packaging, and assembly line automation. Its fast 2 ms response time ensures precise detection in high-speed sorting systems, while the 1500 V insulation protects against transient surges in harsh industrial environments. Hot-swap capability allows module replacement without shutting down the line, maximizing uptime and reducing maintenance costs. Use it with the STBPDT3100/3105 power distribution module for a complete solution.
Installation & Setup
Mount the STBDDI3725KS on a 35 mm DIN rail using the STBXBA3000 base. Connect field wiring via the included 18-terminal screw-type connector (STBXTS1180). Ensure power is supplied through a compatible power distribution module (PDM), such as STBPDT3100/3105, to provide 24 V DC and bus power. The kit supports cold and hot swapping; for hot swap, use basic NIMs. Verify input logic is positive (sink). No special calibration is required – simply connect and configure in your Modicon STB system.
Maintenance & Reliability
Designed for low-maintenance operation, the STBDDI3725KS features an integrated time-lag fuse (5 A) and reverse polarity protection. Enclosure IP20 rating and pollution degree 2 compliance suit clean industrial environments. Operate within -25 to 70 °C without derating to ensure long service life. The vibration resistance up to 3 gn on standard DIN rail confirms reliability in machinery with constant movement. Routine inspection should focus on connector tightness and LED status. Hot-swap capability means you can replace the module without powering down, further enhancing system reliability.
Selection Guide & Purchasing Advice
When ordering, verify compatibility with your Modicon STB backplane and power distribution module (PDM). The Schneider STBDDI3725KS requires a base (STBXBA3000, included) and a screw connector (STBXTS1180, included). For complete system integration, purchase additional components like NIMs and PDMs from UBEST Automation. Contact ubest101 for stock availability and volume pricing. We provide fast shipping and genuine Schneider products.