New Industry Products

Lambda Releases Class I, Div. 2 Rated AD-DC Power Supplies For Hazardous & Explosive Locations

April 27, 2008 by Jeff Shepard

Lambda has introduced a series of Class I, Div. 2 rated DIN Rail-mount ac-dc power supplies available with a choice of output voltages from 5 to 48V. The low power DPP series is specifically designed for use in industrial applications including hazardous environments and explosive gas atmospheres such as those found in chemical and petrochemical plants as well as pumping and distribution stations.

Lambda’s DPP series includes 6 models with Class I, Div. 2, Groups A, B, C and D ratings; enclosed in rugged insulated cases that are only 2.95 x 1.77 x 3.58". These ANSI/ISA12.12 certified supplies include the following models: DPP25-5 (5V/5A), DPP30-12 (12V/2.5A), DPP50-15 (15V/3.4A), DPP30-24 (24V/1.3A), DPP50-24 (24V/2.1A) and DPP50-48 (48V/1.01A). The addition of the "UL1604" suffix to these model numbers will insure the proper UL label will be provided (e.g., DPP50-48 UL1604).

Each model can operate worldwide with a broad range of ac inputs from 85 to 264Vac without the need for pre-selecting the ac input range. In addition, these units will operate from a dc input ranging from 90 to 375Vdc.

The supplies feature a low ripple and noise of 50mV or less and are protected against over-current and over-voltage conditions. In addition the supplies meet EN55022 Class B EMI standards (radiated and conducted), are certified to UL/EN60950-1 specifications, are listed to UL508 and CE Marked.

The units are convection cooled and can operate at full output power over a wide temperature range of from -10 to +71°C, with derating above 60°C. Typical operating efficiencies reach up to 87%. The units can be mounted on either a TS35/7.5 or TS35/15 standard DIN rail.

The DPP family of DIN rail-mount power supplies is available now with prices starting at $37 in 100-unit quantities.