View Full Version : FX-7 inputs
04-07-2010, 02:35 PM
I do not have the docs at hand.
Can an FX-7 handle 4 to 20 ma. inputs? I have two 4 to 20 ma. Meters.
If not I will have to go upto
04-07-2010, 03:51 PM
The inputs can do ...
− A99 temperature
− Ni 1000 (Johnson Controls) temperature
− Pt 1000 temperature
− NTC 10k temperature
− Ratiometric (0.5-4.5 VDC)
− 0-10 VDC
04-07-2010, 04:06 PM
Run a 4-20mA signal through a 500 ohm resistor to get 2-10Vdc. The FX-07 will handle the 2-10 without issue.
04-08-2010, 10:22 AM
Attached pdf is for an NDIO module but the wiring is the same. As long as your 4-20mA is externally powered from the "Meters" then it's only a 2 wire connection with the resistor. If the FX-07 is the source for the "Loop Power" you have to make sure that the "Meters" will accept a 15VDC power source.
You can find the specific wiring detail here.. http://cgproducts.johnsoncontrols.com/default.aspx?main.aspx&2
04-08-2010, 10:38 PM
04-09-2010, 10:48 AM
Thanks ,I am going to try the resistor
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