SIEMENS 6ES7221-1BH32-0XB0 Brand New S7-1200 (SM) Modules

SM1221 16DI 24VDC – Digital Input Module with 16 digital inputs, 24V DC sink/source type. Same dimensions as 8DI model. Inputs divided into 4 isolation groups (4×4). Field isolation voltage 707V. Supports long shielded cable runs (up to 500 m). Used where higher digital input density is required in S7‑1200-based automation systems.