Product Description
. . . . . The Alerton® BACtalk® VLC-550 is a versatile, high-performance, BACnet-compliant field controller designed for heat pumps, AC units, and other terminal unit applications. As a native BACnet controller, the VLC-550 integrates seamlessly with your BACnet system. It communicates at up to 76.8 Kbps on a BACnet MS/TP LAN or can operate as a standalone controller. All VLC-550 control logic is programmed with Alerton's easy-to-learn graphical programming language, VisualLogic®. Programming and setup data is stored in nonvolatile flash memory, ensuring stable and reliable operation. The VLC-550 supports the Alerton Microset™ and Microset II intelligent wall sensors, which offer convenient data display, setpoint adjustment, and technician access to equipment setup parameters. The VLC-550 is built for high-speed processing, with an internal logical loop time of 100 msec. Programmable timers also maintain a resolution of 100 msec. High-resolution, 10-bit analog inputs are field-adjustable for thermistor/ dry contact or 0-5 VDC/4-20 mA . For equipment monitoring, an on-board LED for each binary output indicates ON/OFF status, and a separate LED indicates communication activity on the MS/TP LAN.. Alerton. Honeywell. VLC-550C3.