New Original Siemens 6ES7521-1BP00-0AA0 SM521 64DI 24VDC Sink/Source Digital Input Expansion Module For S7-1500 PLC
We supply brand new original Siemens 6ES7521-1BP00-0AA0 SM521 high-density digital input module dedicated to SIMATIC S7-1500 PLC system. 64-channel DC24V dual-purpose input (Sinking + Sourcing universal), divided into 4 groups ×16 channels, fixed typical input delay 3.2ms, complies with IEC61131 Type3 specification. With optoelectronic isolation between backplane bus and field circuit, supports single-channel open/short circuit diagnostic function, LED channel status indication. Module width 35mm, DIN rail backplane installation, IP20 protection; front terminal connector & connecting cable need separate purchase as accessories. Typical power loss 4.8W, stable performance for large-scale proximity switch, limit switch signal collection in packaging, logistics conveying, automotive equipment automation. Original factory sealed package, 12-month official warranty, global bulk order & worldwide shipping available.