Siemens 6ES7521-1BH10-0AA0 SIMATIC S7-1500 DI 16x24VDC BA Digital Input PLC I/O Module

The Siemens 6ES7521-1BH10-0AA0 is a SIMATIC S7-1500 digital input module, DI 16x24VDC BA, with 16 channels wired in one group and an IEC 61131 type-3 input characteristic. Input delay runs 3-4 ms on standard inputs, and the module ships with its 40-pole push-in front connector included, so it is ready to wire without ordering a connector separately.

Technical Specifications

Selection Notes

16 channels in one potential group with P-reading (sourcing) inputs suit standard 24V DC sensors and pushbuttons wired common-negative; if the application needs channel-level isolation, look at a module with smaller input groups instead. The IEC 61131 type-3 characteristic and 3-4 ms input delay match typical PLC scan-time filtering, and 1000 m shielded cable runs support inputs at the far end of a large machine or line without a remote I/O station. It ships with 40-pole push-in front connectors included, so no separate connector order is needed.

Applications

Digital sensor and pushbutton wiring on SIMATIC S7-1500 CPUs — limit switches, proximity sensors, and operator pushbuttons in machine and process control panels.