R-K Electronics, Inc. Protection Relays & Systems DPM-240A-B

The DPM-240A-B is a Digital Phase Monitor designed to monitor line voltages ranging from 200VAC to 600VAC. It operates on various supply voltages including 12VDC, 24VDC, 24VAC, 120VAC, and 240VAC, with a frequency range of 50/60Hz. The device features a 16-character, 2-line LCD display with backlighting for easy visibility and allows for adjustments via membrane buttons. This monitor can detect over and under voltage conditions, with adjustable thresholds from 7% to 15% for over/under voltage and 3% to 10% for phase imbalance. It includes a trip delay adjustable from 2 to 10 seconds and a re-start delay that can be set from manual reset to 4 minutes. The output relay is rated for 10 Amps at 120VAC and 6 Amps at 277VAC, making it suitable for various applications. The DPM-240A-B is designed for surface mounting and features durable construction with a dust cover and epoxy fill. It operates effectively in ambient temperatures ranging from -40¬8C to 65¬8C, although the display and membrane may not function below -20¬8C. This product retains all settings and the last four fault records even during a complete power loss, ensuring reliability in monitoring and control applications.