Simatic S7-400, Digital Output SM 422, Isolated 32 Do; 24 V DC, 0.5 A, E-Stand: 04. Simatic S7-400 Digital Output SM 422 Isolated 32 Do 24 V DC 0.5 A E-Stand: 04 6ES7422-1BL00-0AA0 Siemens is a high-performance digital input/output module designed for industrial automation applications. It provides reliable and efficient control of various processes and machinery. This versatile module can be used in diverse industries such as manufacturing, energy, and transportation. With its advanced features and robust construction, it ensures seamless integration and optimal performance. You can purchase this item at PLC2Day, a trusted supplier of industrial automation products.