Digital input and output modules S7-1500 35 mm

These extension modules, you can use either directly on the central rack in S7-1500 system or in a ET200MP node. To each CPU we cab connect up to 32 modules on the central racket. They are connected to each other with a U-connector. U-connector included with each IO module. The CPU feeds the back plan buss. When you expand the system with many IO modules or when you put stress on the CPU's feed a lot, eventually reaching the limit of how much power the CPU can deliver to back plan buss. Then you can add more power on the back plane via an extra system net component, a PS. You can build up its configuration in TIA-portal or with Simatic selection tool to see when you need to add PS. Hence:
o Max. 12 expansions without additional power supply and no extra power sockets
o Max. 32 with extra power supply
There are different variants of expansion modules, the idea is that the customer should not have to pay for more functionality than they really need. We have High Feature (HF), High Speed (HS),
Standard modules (ST) as well as Basic modules (BA). The difference is mainly the ability for diagnosis, accuracy and speed of the cards.
All 25 mm modules include Push-in front contact. For all the other modules
the front connector must be ordered separately.
For more details, you can look at the support pages of each article number, in the manual or in the
ST70.