Siemens SIMATIC S7-1500 Manual page 14

Address space
4.1 Address space
Address space for configuration as 1 x 32-channel DI 32x24VDC BA
The figure below shows the address space assignment for configuration as a 1 x 32-channel
module. You can freely assign the start address for the module. The addresses of the
channels are based on the start address.
The letters "a" to "d" are printed on the module. "EB a", for example, stands for module start
address input byte a.
Figure 4-1
Address space for configuration as 4 x 8-channel DI 32x24VDC BA S
For the configuration as a 4 x 8-channel module, the channels of the module are divided into
multiple submodules. The submodules can be assigned to different IO controllers when the
module is used in a Shared Device.
Unlike the 1 x 32-channel module configuration, each of the four submodules has a freely
assignable start address.
Figure 4-2
14
Address space for configuration as 1 x 32-channel DI 32x24VDC BA
Address space for configuration as 4 x 8-channel DI 32x24VDC BA S
Digital input module DI 32x24VDC BA (6ES7521-1BL10-0AA0)
Manual, 09/2014, A5E32363711-AB