6ES7321-7BH01-0AB0 Siemens S7-300, DIGITAL INPUT SM 321, 16 DI, DC 24V - simatic s7-300, digital input sm321, galvanically isolated, 16 di, dc 24v, 1 x 20 pin, process interrupt, diagnostics, fit for isochrone mode
6ES7326-1BK02-0AB0 | Siemens | SIMATIC S7, Digital input SM 326
SIMATIC S7, Digital input SM 326, F-DI 24×24 V DC, Fail-safe digital input for SIMATIC S7 F-systems with diagnostic alarm, up to Category 4 (EN 954-1)/ SIL3 (IEC61508)/PLE (ISO13849), 1x 40-pole