W Series | Bel Power Solutions

Application

The Convert Select front end series represents a family of DIN-rail mountable dc dc and ac dc converters with power factor correction. The converters have been designed according to the latest industry requirements and standards. The converters are ideal for use in outdoor and other demanding applications to power building control systems, factory automation, industrial controls, instrumentation, electromagnetic drives, fans, and other dc loads. Different models are available with a single output or two independently regulated, electrically isolated outputs with 12, 24, 36, or 48 V. Special models for battery charging are available. The EW models are particularly suitable for 110 V railway applications; they have been designed in accordance with the railway standards EN 50155 and EN 50121.

Key features of the Convert Select line include power factor correction with low harmonic distortion, negligibly low inrush current, high immunity to transients and surges, and low electromagnetic emissions. Internal protection circuits such as input over- and undervoltage lockout, thermal protection, as well as output overvoltage protection by a second control loop ensure safe operation of the final system.

The outputs deliver an electrically-isolated Safety Extra Low Voltage, SELV, (except models LWR/LWN1740) and low output noise. They are no-load, overload, and short-circuit proof. The electronically controlled short-term peak power capability of up to 150% of the rated output power enables the front end converters to deliver additional power to start-up motors or to safely operate subsequent circuit breakers. Built-in large sized output capacitors absorb possible reverse energy, which may be caused by quick deceleration of electromagnetic drives connected directly to the output. A green LED at the front cover displays the status of the output(s).

Feature List

RoHS lead-free-solder and lead-solder-exempted products are available
Rugged 35 mm DIN-rail snap-fit design
Class I equipment
Universal ac input with single stage conversion ac to dc, or dc input of 66 to 350V
Power factor correction, harmonics IEC/EN 61000-3-2
Virtually no inrush current
Immunity to IEC/EN 61000-4-2, -3, -4, -5, -6, -11
Emissions according to EN 55011/022
Very high efficiency; up to 89%
Short-term output peak power capability, rectangular current limiting characteristic
Single or two independently regulated outputs with 12, 24, 36, or 48V
Outputs no-load, overload, and short-circuit proof
PCBs protected by lacquer
Very high reliability