Schneider STBDDI3725KS Guide: 16-Input 24V DC Module
Schneider STBDDI3725KS: Technical Overview
The Schneider STBDDI3725KS is a basic digital input kit designed for the Modicon STB distributed I/O solution. This module offers 16 discrete inputs with a 24 V DC voltage type, making it suitable for a wide range of industrial applications. Engineers will appreciate its robust design, including hot swapping capability for basic NIMs and cold swapping support, which enhances system flexibility during maintenance or upgrades.
Key Specifications and Performance
This input module delivers reliable performance with a response time of 2 ms for both off-to-on and on-to-off transitions. The discrete input current is 4.5 mA, with state 1 guaranteed above 2.5 mA and state 0 below 1.5 mA. The module operates with a positive logic input type, ensuring straightforward integration with standard sensors and switches.
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Discrete Input Voltage: 24 V DC (limits: 11...30 V at state 1, -3...5 V at state 0)
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Input Protection: Power protection integrated fuse on PDM time lag 5 A, resistor-limited input, and reverse polarity protection
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Insulation: 1500 V between channels and logic bus for 1 minute
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Status LEDs: One green LED for module status (RDY) and one green LED per channel for channel status (IN1 to IN16)
Installation and Compatibility
The kit includes the STBXTS1180 18-terminal screw type connector, the STBDDI3725 module, and the STBXBA3000 base. It requires a power distribution module like the STBPDT3100/3105 and consumes 100 mA at 5 V DC for the logic bus. The module supports hot swapping for basic NIMs and cold swapping, allowing you to replace components without shutting down the entire system. This feature significantly reduces downtime during maintenance.
Environmental Durability
With an IP20 degree of protection conforming to EN 61131-2 class 1, the STBDDI3725KS operates in ambient temperatures from -25 to 70 °C without derating and stores from -40 to 85 °C. It withstands vibration up to 3 gn at 58–150 Hz and shock resistance of 30 gn for 11 ms. These specifications ensure reliable operation in demanding industrial environments.
For automation engineers seeking a dependable digital input solution, the Schneider STBDDI3725KS offers a compact, high-performance package with easy integration into Modicon STB systems.