Siemens 6AG1321-1CH20-2AA0 Digital Input Module — Legacy Replacement. Digital inputs: 16 DI; Compatible equipment: 6ES7321-1CH20-0AA0; Ambient temperature range: -25…+70 °C.
***spare part*** SIPLUS S7-300 SM 321 based on 6ES7321-1CH20-0AA0 with conformal coating, -25…+70 °C, digital input isolated 16 DI, 48-125 V DC, 1x 20-pole