The Allen-Bradley 1756-IA16I is a 16‑channel AC‑isolated input module for ControlLogix I/O that monitors 120 V AC field signals in industrial automation. Each of the 16 inputs is independently isolated from the backplane and from one another, supports 79–132 V AC operation at 47–63 Hz, and draws minimal backplane power with a total backplane consumption around 0.71 W and a maximum dissipation near 4.9 W at 60°C. Timing specifications include an off‑to‑on delay up to 10 ms with user‑selectable input filter times and an on‑to‑off delay up to 8 ms, making it suitable for sensing common 120 V AC sensors such as relays and mechanical switches within a ControlLogix chassis.
