The Siemens 6ES5430-4UA14 SIMATIC S5 digital input module (DI 430) provides 32 isolated 24 V DC inputs in a compact design for legacy S5 controllers. It is intended for use with SIMATIC S5-135U and 155U PLCs and can also be installed in an S5-115U using adaptor casing 6ES5491-0LB11. This 32‑channel DI module reads field signals from sensors and switches, offering robust isolation between the backplane and the input circuits for reliable operation in older S5 installations.
