Pin 4 to I2- and pin 1 to I2+. The EZIO6I spec says 3-30 for an ON condition. The 17-19 does not exceed the maximum and the 0-0.5 should be low enough to be outside the active range. My expectation is that Arm will turn I2 OFF and Disarm will turn I2 ON.
EDIT: I assume the values you gave were DC volts.