6/26/2010 3:58 PM | |
Posts: 14 Rating: (0) |
hi everybody, can we directly connect an analog sensor 4-20mA on S5 PLC 95U port ? if so, can you tell me how and which input to use in my program. IW40 toIW52 . |
6/26/2010 4:34 PM | |
Joined: 10/7/2005 Last visit: 10/19/2024 Posts: 3024 Rating: (1054)
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Hello kthioune the 95U's onboard AI's areall 0-10V, so a direct connection of a 4-20mA sensor will NOT work. This leaves you with fourchoices that I can think of (in order of personal preference): 1.) Add a 4-20mA capable external AI card to your 95U 2.) Replace the 0-10V transmitter of your instrument with a 4-20mAtransmitter (or get a new instrument) 3.) Buy a 4-20 mA to 0-10Vconverter (google this term and you'll find plenty of suppliers for them) 4.) Add a 500 Ohm resistor in parallel to your 95U AIand write your own scaling block to make upfor the 4mA "offset"(this isa "cheap and nasty" solution and the least accurate). I hope this helps P.S: The 95U manual link that I supplied you with in THIS linkhas the technical spec of the onboard I/O's. |
Cheers |
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