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Modbus pinout for CM1241 comunication card

1/15/2010 10:18 AM	Rate (0)
luciferC4 Bronze Member Joined: 1/25/2006 Last visit: 1/30/2025 Posts: 257 Rating: (60)	Hi everyone, can someone confirm me that pinout for modbus protocol where s7 1200 (via Cm1241 RS485) is modbus master: pin 3 for + and pin 8 for - signal? Or, have someone pinout for this comunication?

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1/15/2010 11:02 AM	Rate (0)
Abyrne Bronze Member Joined: 11/26/2008 Last visit: 2/26/2025 Posts: 101 Rating: (4)	See below
	Last edited by: Abyrne at: 1/15/2010 11:18 AM
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1/15/2010 11:03 AM	Rate (1)
Abyrne Bronze Member Joined: 11/26/2008 Last visit: 2/26/2025 Posts: 101 Rating: (4)	Hi, the pinout is shown in the attached diagram... Attachment CM1241 pin out.JPG (2073 Downloads)

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This contribution was helpful to 4 thankful Users Kudzi AntoCharly TienTran SRamHos

1/26/2017 3:18 AM	Rate (0)
BraGil Posts: 5 Rating: (0)	And the pin 5, GND, isn't required connect it? Thanks.
BraGil Posts: 5 Rating: (0)
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1/26/2017 9:28 AM	Rate (0)
Duris_I Diamond Expert Joined: 4/28/2015 Last visit: 4/19/2025 Posts: 10876 Rating: (836)	Hello, look to attachment. Other infos can be found on web. Attachment RS485_GND.jpg (629 Downloads)
	Last edited by: Duris_I at: 1/26/2017 9:28:24 AM Last edited by: Duris_I at: 1/26/2017 9:28:36 AM With best regards... Ivan Duris Flight: OMICO
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