Siemens PLC Guides

For Siemens, popular input/output (I/O) modules include the SM 523 for S7-1500, offering 16 digital I/Os in a compact 25mm design, and the S7-1200 modules like SM 1223 with 8 or 16 digital I/Os, known for their compact and cost-effective solution.

Key Siemens I/O Modules:

• S7-1500
• Popular Digital Input Modules
• DI 16x24VDC BA: 16 digital inputs, sourcing input.
• DI 32x24VDC BA: 32 digital inputs, sourcing input.
• DI 16x24VDC HF: 16 digital inputs, suitable for high-frequency applications
• Popular Digital Output Modules:
• DQ 16x24VDC/0.5A BA: 16 digital outputs, 0.5A capacity.
• DQ 16x24..48VUC/125V DC/0.5A ST: 16 digital outputs, suitable for safety-oriented shutdown of load groups.
• DQ 8x24VDC/2A HF: 8 digital outputs, high-frequency, 2A capacity.
• Popular Analog Input Modules:
• AI 4xU/I/RTD/TC ST: 4 analog inputs, supports various input types (Universal, Current, RTD, Thermocouple).
• AI 8xU/I/RTD/TC ST: 8 analog inputs, supports various input types (Universal, Current, RTD, Thermocouple).
• Popular Analog Output Modules:
• AQ 2xU/I ST: 2 analog outputs, supports Universal and Current outputs.
• S7-1200
• Popular Digital Input Modules
• SM 1221, 8 digital inputs (24 V DC)
• SM 1223, 8 digital inputs/8 digital outputs (24 V DC)
• Popular Digital Output Modules:
• SM 1222, 16 digital outputs (24 V DC, 0.5 A)
• SM 1223, 8 digital inputs/8 digital outputs (24 V DC)
• Popular Analog Input Modules:
• SM 1231, 8 analog inputs
• SM 1234, 4 analog inputs/2 analog outputs
• Popular Analog Output Modules:
• SM 1234, 4 analog inputs/2 analog outputs
• S7-300/400 Obsolute. Replaced by S7-1500
• S7-200 Obsolute. Replaced by S7-1500