SAN DIEGO – TDK-Lambda Americas Inc. in San Diego is introducing the DRB120 and DRB240 three-phase DIN rail mount AC-DC power supplies for industrial machinery and systems, as well as conventional switch cabinets and communications equipment.
The models are rated at 120 and 240 Watts with a two-second peak power capability of 144 and 288 Watts, which enables operation with inductive and capacitive loads.
On initial start-up the products have a low energy inrush current that helps to avoid nuisance tripping of circuit breakers when multiple units are installed in a system.
The AC-DC converter power supplies accept a three-phase 350-to-575-volt AC input, with output voltages of 12 or 24 volts rated at 120 Watts, and 24 or 48 volts rated at 240 Watts.
The DRB series has an adjustment range of 11.4 to 15 volts, 22.5 to 29 volts, and 45 to 56 volts to compensate for voltage drops in wiring, O-ring field-effect transistors (FETs) for redundant operation or to accommodate for non-standard output voltages.
For larger power systems or N+1 redundant systems, a front panel DIP switch enables droop mode current sharing for parallel operation. For output voltage monitoring, a front panel LED indicator and a DC OK relay contact are available. Remote on/off is possible using a closed relay contact or less than 4-volt input.
All units are enclosed in a compact, rugged metal case measuring 55 millimeters wide, 129 millimeters high and 138.2 millimeters deep, allowing space for other products to be mounted on the DIN rail. Users can chose between screw terminations or push-in wire connectors for input and output wiring.
The three-phase convection cooled DRB models are rated for operation in -25 to 70-degree ambient temperatures, with derating above 55 C. The operating efficiency is 94 percent, thus reducing power losses and lowering internal temperatures for a longer field life. The low off-load power consumption can be reduced even further to below 2.3 Watts by using the remote on/off function to reduce energy consumption.
For more information contact TDK Lambda online at https://product.tdk.com/en/power/drb.