The SIMATIC S7-1500 DI 16x24 V DC BA (6ES7521-1BH10-0AA0) is a digital input module from Siemens, designed for SIMATIC S7-1500 systems. \nThis module features 16 input channels grouped in sets of 16, operates at 24 V DC, and has a typical input delay of 3.2 ms. It supports Type 3 inputs (IEC 61131). \nThe module is delivered with a push-in front connector. With a net weight of 0.312 kg and packaging dimensions of 15.10 x 20.30 x 4.00 cm, \nits compact design helps save space in control cabinets. DIN rail mounting is supported. It is used in industrial automation systems, particularly for processing digital signals.