Siemens SIMATIC S7-1500 Manual page 14

Address space for configuration as DI 16x230VAC BA
The following figure shows the address space allocation for the configuration as 16-channel
module. You can freely assign the start address for the module. The addresses of the
channels are derived from the start address.
Figure 4-1
Address space for configuration as 2 x 8-channel DI 16x230VAC BA S
For the configuration as a 2 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 submodules is dependent on the interface module used. Observe the
information in the manual for the particular interface module.
Contrary to the 1 x 16-channel module configuration, each of the two submodules has a
freely assignable start address.
Figure 4-2
DI 16x230VAC BA Digital Input Module (6ES7521-1FH00-0AA0)
Manual, 07/2014, A5E03485975-AC
Address space for configuration as 16-channel DI 16x230VAC BA
Address space for configuration as 2 x 8-channel DI 16x24VDC SRC BA S
Address space
4.1 Address space
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