The Gateway has two digital inputs and one digital output.
Digital inuts
The digital inputs are completely independent optically isolated inputs that accept an input signal level of up to 30V DC. They have no common minus. They can be connected either with a common plus or minus. Can be controlled with open collector. They require to be powered. The range of the signal considered as a logical 1 is from 3.5V to the maximum input voltage.
Digital output
The digital output is realized on a relay whose load capacity is 3A. The maximum voltage is 160V AC and 30DC. The output is only in normal open format (NO).