Andover Controls SCX920AK Energy Management Controller

The Andover Controls Infinity SCX920AK Energy Management Controller is a standalone, programmable microprocessor‑based system controller for direct digital control of HVAC equipment such as chillers, cooling towers, boilers, air handling units, and perimeter systems. It operates on 120/240 VAC 50/60 Hz and uses Andover’s Infinet field‑bus to coordinate an Infinity network of up to 254 SCX 920 controllers under the CX family for peer‑to‑peer communication and centralized programming. The unit provides sixteen universal inputs (digital on/off, counters to 4 Hz, 0–10 VDC, or temperature) and eight universal outputs (0–20 mA, 0–20 V, or Form C relays), with two Form C relays configurable as Tri‑State bidirectional outputs, plus an IO expansion port for EMX modules (EMX‑140 two pneumatic outputs, EMX‑150 two analog outputs, EMX‑160 eight digital inputs) to extend the control footprint. Optional 2×16 character LCD local display, replaceable backup battery delivering about seven years of RAM/RTC retention during power loss, and a panel‑mount enclosure with a metal cover plate (wall‑mount enclosure available) complete the package.