L0504-Murata muRata common mode inductor 90Ω 150mA

In some CPU modules of Siemens S7-300/400 series plc, in addition to the above parameters, there are communication setting options.
The setting object is opened. The display window has three setting areas: “PG Communication”, “Operation Panel Communication (OPCommunication)” and “S7 Standard Communication (S7 Standard)” (see Figure 14-2.11).

In different communication setting areas, you can enter the number of connections corresponding to external devices.
For setting "PG Communication" and "OP Communication", at least "l" should be entered to connect the programmer to the operation panel.