Siemens S7

I have to install a ethernet card on an S7 with a ET200M remote rack and i want to knowe if i can install the card (e-net) in the ET200M group? or does it need to be connected with the S7 prosecer?

I assume that you are talking about installing a CP 343 module. You can install it in an ET200m rack with no problems.

You probably have some type of IM-153 as the connection point to the main rack. The number of slots available in the rack are dependent on this module.

Also, if installing in a sub rack with an IM, you will be limited by the total number of bytes to that rack. All comms to the CPU need to pass through the IM.

camaroblk68 said:

I have to install a ethernet card on an S7 with a ET200M remote rack and i want to knowe if i can install the card (e-net) in the ET200M group? or does it need to be connected with the S7 prosecer?

Click to expand...

AFAIK an CP343 doesn't work in a ET200M group. The CP343 should be in the rack where the CPU is, or in a extension rack (IM360/361).

Some definitions might be in its place here.

S7-300 modules in expansion-racks connected to the CPU rack via IM360+IM361:

A CP343-1 or any other specialty module that connects via the K-bus (MPI) on the backplane will work OK.

S7-300 modules in expansion-racks connected to the CPU rack via IM365.
or
S7-300 modules in expansion-racks connected to the CPU rack via IM153-1 or IM153-2 or IM153-3 (This is ET200M via DP).
or
S7-300 modules in expansion-racks connected to the CPU rack via IM153-4 (This is ET200M via PN):

A CP343-1 or any other specialty module that connects via the K-bus (MPI) on the backplane will not work. Some CPs that exchange data via the P-bus will work OK, such as CP340.