Dear all,

              I need manual of CM1241 with order code 6ES7241-1CH32-0XB0 .Please provide me link.

Thanks 

Hello,

look to S7-1200 system manual:

https://support.industry.siemens.com/cs/document/109478121/simatic-s7-s7-1200-programmable-controller?dti=0&lc=en-WW

Thanks bro for replying.now i have question that

we are using pin 3 TxD+ and pin 8 TxD- for RS485 connection SHELL chasis ground terminal not available at Slave side.

Can we use the simple DB9 connector at CM1241 side or is it compulsory to use the dedicatedProfibus-DP connector..??

amankk123123

Thanks bro for replying.now i have question that

we are using pin 3 TxD+ and pin 8 TxD- for RS485 connection SHELL chasis ground terminal not available at Slave side.

Can we use the simple DB9 connector at CM1241 side or is it compulsory to use the dedicatedProfibus-DP connector..??

Please have a look on Table 4 for grounding:

SIMATIC S7 S7-1200 Programmable controller - Siemens Industry ...

Hello Amankk,

yes, you can use DB9 connector.