Spot Original Siemens 6ES7521-1BH10-0AA0 SM521 16DI 24VDC Sinking Digital Input Expansion Module For S7-1500 PLC
Spot available brand new original Siemens 6ES7521-1BH10-0AA0 (SM521) digital input module designed for SIMATIC S7-1500 PLC system. Equipped with 16-channel 24VDC sinking digital input complying with IEC Type3 standard, typical input delay 3.2ms, adjustable filter time from 0.1~20ms via program setting. Support single-channel diagnostics for wire breakage and short circuit, optocoupler isolation between internal bus and field circuit, IP20 protection, install onto S7-1500 backplane DIN rail. Front connector needs separate purchase. Commonly used for collecting proximity switch, limit switch feedback signals in general factory automation, original package with 12-month warranty, fast worldwide delivery from spot inventory.