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Analog(4 wire wiring)

Created by: Tummy at: 2/6/2014 7:08 AM (13 Replies)

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2/28/2014 8:38 PM	Rate (0)
Tummy_Kedi_72 Posts: 3 Rating: (0)	Hi, Itisoneperson,dontgiveupyetplsimreallystrugglingtogetthisproblemsorted
Tummy_Kedi_72 Posts: 3 Rating: (0)
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3/1/2014 4:47 PM	Rate (0)
Ton Verra Gold Member Joined: 4/20/2007 Last visit: 12/13/2024 Posts: 728 Rating: (43)	Tummy_Kedi_72 Hi, Positive wire of tx is connected to 24V and negative to terminal number 2 of Analog Module,and 0V to terminal three of Analog Module and Module selected to C for four wire,i have changed the tx but when i source the ma signal form tx wires(with tx disconneted) i read open circuit,but when i connect tx it gives me either 0% or 100% level indication.I have changed Analog Module many times,there are no brigdes on the module and only one channel is used. DONT KNOW WHAT TO DO ANYMORE,by the way when i change it to 2 wire the tx doesnt come on. Regards Kedi Shouldn't your 0V be wired to 5 instead of 3? Also if you have connected external 24 V and set your analog interface to power the loop, you might have caused some issues...

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3/1/2014 11:56 PM	Rate (0)
kriipc Silver Member Joined: 4/11/2011 Last visit: 1/22/2025 Posts: 132 Rating: (7)	https://www.automation.siemens.com/tf/WW/en/Posts/53519 You must connect all Mana together. http://cache.automation.siemens.com/dnl/DQ/DQ2NjMxAAAA_11966082_FAQ/AI_331-1KF00_Ueberlauf_02_e.gif
	I'm just a human. Mistakes are allowed. Sorry for my english. Only 3 months of training and manuals :)
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3/3/2014 4:24 PM	Rate (0)
Piotr.M Platinum Member Joined: 6/24/2013 Last visit: 1/15/2025 Posts: 1669 Rating: (429)	Hi 2 wire = PLC powers the loop - wire it: (AI.+) ---> Sensor.+ (AI.-)----->Sensor.- 4 wire = Sensor has its own supply Supply.L+---Sensor.L+ (AI.+)-------------Sensor.Signal+ (AI.-)--------------Sensor.Signal- Supply.M---Sensor.M 2 wire sensor supplied from external 24V DC: MODULE TO BE SET TO 4 WIRE Supply.L+---------->Sensor.+ (AI.+) --------------->Sensor.- (AI.-)----------------->M see attached GIF: 1. = 2 wire sensor to 2 wire input 2. = 4 wire sensor to 4 wire input 3. = 2 wire sensor to 4 wire input Attachment sensor_ai.GIF (203 Downloads)

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