nputs. Dimensions: 3.25 x 5.0 inches, track mount. Inputs: 0.5VDC, 4-20 mA, digital switch (dry contact) 8 bit AID conversion Digital Outputs: Triac outputs (zero-cross switching) rated at 50VAC, 1k Power Requirements: 15VDC, 250mA Multizone Expansion Board 016.4097M . n -1 C . I About H