Siemens 6AG1321-7BH01-2AB0 Digital Input Module — Legacy Replacement. Digital inputs: 16 DI; Compatible equipment: 6ES7321-7BH01-0AB0; Ambient temperature range: -25…+70 °C.
***spare part*** SIPLUS S7-300 SM 321 20-pole based on 6ES7321-7BH01-0AB0 with conformal coating, -25…+70 °C, digital input isolated 16 DI; 24 V DC, 1x 20-pole, hardware interrupt, diagnostics, suitable for isochronous mode