2-Wire self-powered DC voltage monitors
HDMS-20PC-DCM Series of self-powered, positive-reading, DC voltage monitors are great replacements for older, hard-to-read, analog panel meters. Simply connect a DC voltage across the rear terminals and the meters are fully operational — no additional components or power supplies are required! Self-Powered, No External Power Required Easy to Install: Only Two Connections Voltages: 3.3/9/12/15/24/36V and –48V Resolution to 0.01V; Accuracies to 10mV Reverse-Polarity and Transient Protected Rugged, Epoxy-Encapsulated Construction Reliable, Screw-Terminal Connectors Replacements for 2-Wire Analog Meters