Multi-Function I/O
1
Current Loop Input: 0 to 25mA
Frequency/Pulse Counter Input: up to 2kHz
General Purpose Digital Input: max. 36Vdc
Low Power Digital Output
0.4 uA (Current Loop Mode)
1 set of 4-position screw terminals (3.5 mm)
The MFIO rounds out the already impressive set of I/Os available on the RIO xR3.
This input can be switched into any of 4 different modes:
Measures current loop inputs with a maximum range of 0-25mA.
Usually 0-4mA and 20-25mA ranges are reserved to signal error/fault conditions, while current loop inputs use 4-20mA to signal proper operating conditions.
1 MFIO – Current Loop Mode
1 x 4 position
The MFIO can be programmed to detect the frequency of an external signal (up to 2kHz), or count pulses.
1 MFIO – Pulse/Freqency Mode
1 x 4 position
Switch to general purpose input if one more input is required. Input signal passes through a Schmitt trigger to reduce noise. Limit to signal levels below 36Vdc.
1 MFIO – General Purpose Input
1 x 4 position
The last mode the MFIO can be switched into is LDPO (Low Power Digital Output).
It is a digital output signal, reacting faster than the latching relays. However, it’s use usually requires an external pull-up to guarantee proper operation.
Not intended to switch external loads. Use as a signal output only.
1 MFIO – Low Power Digital Output
1 x 4 position
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