Siemens SIMATIC S7-200 System Manual page 489

Calculating Your Power Requirement
Use the table below to determine how much power (or current) the S7-200 CPU can provide for
your configuration. Refer to Appendix A for the power budgets of your CPU model and the power
requirements of your expansion modules.
Power Budget
System Requirements
Total Requirements
Current Balance
Current Balance Total
Calculating a Power Budget
5 VDC
minus
5 VDC
equals
5 VDC
Appendix B
24 VDC
24 VDC
24 VDC
475