6ES7521-1BH00-0AB0

SIMATIC S7-1500 – digital input module DI 16×24 V DC HF – 16 channels in groups of 16 of which 2 inputs as counters can be used input delay 0.05..20 ms input type 3 (IEC 61131) diagnostics hardware interrupts: front connector (screw terminals or push-in) to be ordered separately