Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | LWN2660-6EG |
| Manufacturer | Bel Power Solutions |
| Product Family | Melcher W Series |
| Product Type | DIN Rail AC-DC Power Supply |
| Input Voltage | 85–264 VAC |
| DC Input Capability | 90–350 VDC |
| Number of Outputs | 2 |
| Output Voltage | 24.7 VDC nominal |
| Output Current | 5A per output |
| Rated Power | 250W class / 247W specified by Bel |
| Efficiency | Up to approximately 88% |
| Isolation Voltage | 2.8 kV |
| Cooling | Natural convection |
| Operating Temperature | -40°C to +60°C |
| Mounting | DIN rail |
| Dimensions | 113.6 × 103 × 138 mm |
| Protection / Approvals | cCSAus, CE, cULus, NEMKO, TUV |
Bel’s current product page lists the unit as a 247W DIN-rail AC-DC supply with two 24V/5A outputs, while distributor technical data gives the regulated output as approximately 24.7V and the nominal family rating as 250W. The small difference is a catalog-rating convention rather than a different model.
The outputs are independently regulated, and the supply includes power-factor correction and internal protection functions. The W-series documentation also specifies adjustable outputs and a universal input arrangement.
Product Introduction
The Bel LWN2660-6EG is a Melcher W Series DIN-rail AC-DC power supply designed for industrial and railway-oriented control cabinets. It accepts 85–264 VAC and provides two separately regulated 24.7VDC outputs, each rated up to 5A. The unit uses convection cooling and supports a -40°C to +60°C operating range, making it suitable for control panels where forced-air cooling is undesirable.
For plant maintenance, the two-output architecture is more important than the headline wattage. Separate outputs allow cabinet loads to be divided between control electronics and other DC consumers. The input range also accommodates common international AC supplies without requiring a separate input-voltage version.
LWN2660-6EG
Application Scenarios & Field Pitfalls
Engineering Pain Point
In older control cabinets, replacing a dual-output supply with a conventional single-output 24VDC unit can change the original load distribution and protection arrangement. The LWN2660-6EG provides two independently regulated outputs, so replacement planning should account for how the original cabinet used each output rather than simply matching total wattage.
Typical Applications
- Industrial automation cabinets — supplying PLC, I/O, instrumentation, and control circuits.
- Railway control equipment — the manufacturer identifies the LWN2660-6EG for railway applications.
- Factory automation systems — centralized 24VDC distribution for control and instrumentation loads.
- Industrial instrumentation — isolated low-voltage DC power for electronic control equipment.
Technical Pitfalls to Avoid
- Do not treat the two 5A outputs as automatically equivalent to one 10A output. The supply is specified as two independently regulated outputs; verify the cabinet’s actual wiring and whether output paralleling is permitted before changing the configuration.
- Check minimum-load requirements. Distributor specifications identify a minimum load requirement, so a very lightly loaded output should be evaluated against the manufacturer’s operating conditions.
- Check cabinet clearance. The unit is approximately 113.6 × 103 × 138 mm, so replacing a narrower DIN-rail PSU may require additional cabinet space.
- Do not confuse LWN2660-6EG with similarly numbered W-series supplies. LWN2663 and other LWN models have different output configurations. Match the complete model before procurement.
Related Products
- LWN2663-6EG — Related Melcher W-series DIN-rail supply; verify its output configuration before considering substitution.
- LWN1601-6EG — Smaller W-series DIN-rail power supply intended for lower-power applications.
- LWN2660-6ERG — Related LWN2660 variant with a different model suffix; confirm the exact electrical and mechanical configuration before replacement.
- LWN2770-6EG — Higher-power member of the LWN family for applications requiring a different output capacity.
- LWR1801-6ER — Related Melcher W-series converter, but its electrical configuration differs from the LWN2660-6EG.
- HZZ00624-G — DIN-rail mounting bracket kit compatible with W/X Melcher converters.
- HZZ00618-G — Universal mounting bracket kit for W/X Melcher series converters.
Procurement Check
Specify the complete model number and verify the cabinet’s required two-output 24.7VDC/5A configuration, AC input range, load on each output, mounting space, and wiring arrangement. Bel currently lists the model as active, so it should not be treated as an obsolete-only spare.
