Sales Original Siemens 6ES7521-1BH00-0AB0 SM521 16DI 24VDC Digital Input Expansion Module With Push-in Terminal For S7-1500 PLC
We focus on sales of brand new original Siemens 6ES7521-1BH00-0AB0 SM521 digital input module for SIMATIC S7-1500 PLC. 16-channel 24VDC sinking digital input conforming to IEC Type3, typical input delay 3.2ms, filter time adjustable 0.1~20ms in program. Comes with factory pre-installed push-in spring front connector for fast field wiring; support single-channel diagnosis for open circuit and short-circuit fault, opto-isolation between backplane and field side, IP20 protection, backplane DIN rail installation. Widely used for limit switch, proximity sensor signal collection in general industrial automation. Original package with 12-month manufacturer warranty, sufficient stock for bulk purchase and global delivery.