Measurement Computing's CIO-PDISO8 has eight isolated digital inputs and eight relay outputs. The CIO-PDISO8 is designed for applications where high voltage points are sensed and/or controlled.
Outputs are from eight electromechanical relays. Five relays have FORM C
configuration, and three are FORM A normally-open configuration. The relays are controlled by writing to one, 8-bit port. The state of the relay control register may be read back from the same port.
The eight inputs are optically-isolated (500 V) and can be read back as a single byte. The inputs are not polarity sensitive and may be driven by either AC (50 - 1000 Hz) or DC. Each input has a switchable low-pass filter with a time constant of 5 ms (200 Hz).