Supply Original Siemens 6ES7521-1BL00-0AB0 SM521 32DI 24VDC Sinking Digital Input Expansion Module With Push-in Connector For S7-1500 PLC
We supply brand new original Siemens 6ES7521-1BL00-0AB0 (SM521) digital input module exclusively for SIMATIC S7-1500 PLC. 32-channel 24VDC sinking input complying with IEC Type3 standard, typical input delay 3.2ms, programmable filter time from 0.1ms to 20ms. Factory pre-installed push-in spring front connector for quick field wiring. Optoelectronic isolation between internal bus and field circuit, supports per-channel fault diagnosis for wire break and short circuit, LED status indication, IP20 protection, backplane DIN rail mounting. Suitable for large-volume limit switch and proximity signal collection in general industrial automation. Original sealed package with 12-month manufacturer warranty, support bulk order and global delivery.