Current Value range: 0 to 64,512; Excess gain: 0P to 999P, Timer duration selectable: 0. NPN open-collector 24 V, 100 mA max. (when the expansion unit (s) is connected), Residual voltage: 1. Current Value (4-digit red LED indicator) illuminated together. (when the. Introducing the FALCON IV, our latest upgrade in a revolutionary line of custom CPU's designed by KEYENCE specifically for our fiber optic sensors. Download FS-V31 Keyence datasheet PDF, view technical specifications, and find pricing information.