Configurable VAV Box controller, all fan types, staged, incremental, proportional SCR box heating (selectable). The Configurable VAV Box controllers run a pre-engineered HVAC zoning sequence and provide the inputs and outputs required for this application. The ZEC controllers contain multiple features to ensure occupant comfort. The ZEC controllers have an optional occupancy sensing capability to switch from occupied mode to standby mode based on activity in the zone. Standby mode uses setpoints that are higher and lower than occupied mode setpoints to maximize energy savings. The ZEC controllers also use plug-and-play technology to detect which network sensor types it is connected to. Refer to the Verasys® System Product Bulletin (LIT-12012342) for important product application information. Power Supply requirement 20 VAC to 30 VAC at 50 Hz to 60 Hz, Class 2 power supply or Safety Extra-Low Voltage (SELV) at 50/60 Hz (20 VAC minimum). Power consumption 10 VA not including external load. Ambient Conditions: Ambient operating conditions: 0°C to 50°C (32°F to 122°F); 10% to 90% RH condensing. Ambient storage conditions: -40°C to 85°C (-40°F to 185°F); 10% to 90% RH. Processor RX630 Renesas® 32-bit microcontrolle. Memory 1.5 MB flash nonvolatile memory for operating system, configuration data, and operations data storage and 512k. Synchronous Random Access Memory (SRAM) for operations data dynamic memory. Mounting on a flat surface with screws.