Our PCISO 08R provides eight optically isolated inputs and eight relay
outputs. It also includes three 20-pin connectors to attach PCISO 08RA
expansion boards. The PCISO 16R is a
PCISO 8R plus a PCISO 8RA.
Inputs on the 8R and 8RA are not polarity sensitive. They may be mixed
between 5 to 24 VDC or AC frequencies from 50 to 1000 Hz.