Multi-Function I/O
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:
- Current Loop Input: to measure 0-25mA currents.
- General Purpose Input: in case all other hybrid inputs are busy.
- Pulse/Frequency Counter: to keep track of rapid fire changes.
- Low Power Digital Output: fast acting, digital out.
MFIO
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.
The MFIO can be programmed to detect the frequency of an external signal (up to 2kHz), or count pulses.
MFIO
MFIO
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.
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.
MFIO
