Siemens 6SE9521-8CC40The Siemens 6SE9521 8CC40 is a high performance digital input module specifically designed for the Simatic S7 400 series of programmable logic controllers (PLCs). This robust module features 16 digital inputs capable of accommodating both NPN and PNP input types at a voltage of 24 V DC, making it versatile for various industrial applications. With an operating temperature range of 20C to 60C and a storage temperature of 40C to 80C, it ensures