Here is example of the setup and test.
1. Set IP address of your computer 192.168.0.200, Subnet mask 255.255.255.0. Default gateway leave empty.
2. In PM335 define IP address of ETH1 port. for example 192.168.0.203, Subnet mask 255.255.255.0. Default gateway 192.168.0.200.
2. Connect the PM235 directly your computer.
4. Run PAS and communicate by Modbus TCP to EM235/PM335 device with installed DI module (Dry Contact)
5. Close one of digital inputs and check its status in PAS.
6. IEC 69870-5-104 Setup. Use Network 1.
6.1 Set IP address of your computer into Redundant connection IP address #1 and Redundant connection IP address #2

Set Cyclic transmission period 0 for spontaneous messages.
After the test set Cyclic transmission period as per your requirements.
6.2 Set Class 1 for Digital Inputs parameters. Here in the example are used Single point parameters

6.3 Add appropriate parameters (see 6.4 above) into IEC 60870-5 Class 2 Setup.

7. Install IEC60870-101/104 Test toll.
7.1 Communicate to device in the test IP Address 192.168.0.203, port 2404.
7.2 Communicate to device in the test IP Address 192.168.0.203, port 2404.
5.1 Short CM and DI#5 or any other DI and then open the contact
5.2 Find an message in the test tool.