Digital Input Module SM321 Siemens 6ES7321-1BH01-0AA0

Siemens SM321 Digital Input Module 6ES7321-1BH01-0AA0 This module corresponds to the SIMATIC S7-300 series, specifically the SM 321 module, which provides 16 digital inputs, powered at 24 V DC and with optical isolation. It connects to the rack via a 20-pin connector.