Siemens SIMATIC S7-1500 Manual page 21

Address space
Address space for configuration as 8 x 8-channel DQ 64x24VDC/0.3A BA S
For the configuration as an 8 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.
The number of usable IO controllers depends on the interface module used. Please observe
the information in the manual for the particular interface module.
Unlike the 1 x 64-channel module configuration, each of the eight submodules has a freely
assignable start address.
Figure 4-2
20
Address space for configuration as 8 x 8-channel DQ 64x24VDC/0.3A BA S
Digital output module DQ 64x24VDC/0.3A BA (6ES7522-1BP00-0AA0)
Equipment Manual, 07/2020, A5E48024569-AA