Automatic Crossover The characteristic of a power supply that switches its operating mode automatically as a function of load or setting from the stabilization of voltage to the stabilization of current. The term is reserved for units having substantially equal stabilization for both voltage and current, not for voltage-limited current stabilizers or current-limited voltage stabilizers.
Crossover Point The point on the operating locus of a voltage/current automatic crossover power supply formed by the intersection of the voltage-stabilized and current-stabilized output lines. The resistance value (E/I) defined by this intersection is the matching impedance for the power supply, which will draw the maximum output power.
With the introduction of 14 different model groups in a full range of d-c outputs, both single output and multiple outputs, Kepco is well positioned to serve the needs of OEMs who will increasingly find themselves obliged to conform to the RoHS rules.
JBW, are seven groups of affordable PC card-style power supplies that offer 10, 15, 30, 50, 75, 100 and 150 watts of low voltage d-c for space and cost-sensitive OEMs. JBW are of PC-card construction and feature wide range a-c input (85-265V a-c) with power factor correction.
MTW are supplies that offer 15, 30 and 60 watts of triple-output low voltage d-c for space and cost-sensitive OEMs. All three models produce triple outputs comprised of 5 volts and ±12 volts d-c from an a-c input that accepts 85-265V a-c. They will also accept a d-c input from 110-370V d-c. The 5V output is isolated from the ±12V outputs.
Kepco's RTW series are general-purpose, L-chassis, single output power supplies. They are available in 50, 100, 150 and 300-watt power levels. Their small size and very low profile allow the RTW to be fitted into small spaces. Power factor correction (PFC) and wide range a-c input (85-265 V a-c) is standard.
The popular 1U high 1200 watt power supplies in Kepco's KLP group now offer an interface for Ethernet control using the LXI programming protocol for communication with test equipment. This new interface, a $250 option, is in addition
to the GPIB and isolated analog interface that is standard on Kepco's KLP. RS 232 programming is not available when the Ethernet version is ordered. The LAN interface is accessed through a standard RJ-45 connector on the rear of the KLP. Unlike the GPIB (IEEE-488), the Ethernet LAN is not limited by distance.
KLP are unique power supplies in that they offer three boundaries: voltage limiting, current limiting and power limiting. This enables multiple volt-ampere ratings from a single box.
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