modbus Intellisys Modbus COM Port to DB9 CM 1241

[Herbid]

Dear All

 

Sorry for my English

I have Siemens CM1241 (picture attach) and need to communicate with Intellisys XE 90 via Modbus RTU, period.

The problem is, form XE 90 the connector is Phoenix Contact 2-Position Screw Plug Connectors MC 1,5/ 2-ST-3,81 1803578,or in other word, only 2 contacts form P9 COM1 = L1 , L2 (picture attach).

How we connect it to DB9 Female in CM1241? What signal go to what Pin? How about the Ground? Do I need Resistor?

 

Thanks for all your supports

 

Best Regards

[DanW]

Solution on the Siemens forum:

https://support.industry.siemens.com/tf/ww/en/posts/intellisys-modbus-com-port-to-db9-cm-1241/162711/?page=0&pageSize=10