Product Core Brief

• Model: LWN2660-6EG
• Brand: ABB / Bel Power Solutions (W-Series)
• Series: LWN2660 DIN-rail power supply family
• Core Function: Converts universal AC or DC input into two isolated, regulated 24.7 VDC outputs for industrial control and automation loads.
• Product Type: Dual-Output DIN-Rail AC-DC Switching Power Supply
• Key Specs: 247 W total | 2× 24.7 VDC, 5 A per channel | 85–264 VAC / 90–350 VDC input | Improved EMC performance
• Condition: New Original / New Surplus

Key Technical Specifications

• Manufacturer: Bel Power Solutions / ABB W-Series family
• Part number:
• Output configuration: 2 isolated outputs
• Output voltage: 24.7 VDC per channel
• Output current: 5 A per channel
• Total output power: 247 W
• AC input range: 85–264 VAC
• DC input range: 90–350 VDC
• Insulation voltage: 2.8 kVDC
• Switching frequency: 130 kHz
• Operating temperature: -40 °C to +60 °C
• Mounting: 35 mm DIN rail
• Dimensions: Approx. 113.6 × 103 × 138 mm
• Weight: Approx. 1.65 kg
• Compliance: RoHS 2011/65/EU (amended 2015/863)

 

Product Introduction (No Fluff)

The LWN2660-6EG is a dual-output DIN-rail AC-DC power supply from the Bel Power Solutions W-Series, also referenced under ABB industrial supply families. It delivers two isolated 24.7 VDC outputs at 5 A each, with a total rated power of 247 W.

The “EG” suffix indicates improved EMC performance compared with earlier non-E variants. With universal AC and DC input ranges, it suits control cabinets, instrumentation panels, factory automation systems, and applications requiring two electrically separated 24 VDC rails. Because it is a dual-output unit, it is not a direct one-for-one replacement for single-output 24 VDC supplies without checking load distribution.

 

QA & Testing SOP (Dynamic & Transparent)

Dual-output rail supplies need more than a basic power-on check. Here is how we verify this unit:

1. Inbound authenticity check: Confirm Bel Power Solutions / ABB W-Series labeling, LWN2660-6EG marking, serial/lot code, terminal block condition, and housing integrity. Units with mismatched labels or reworked connectors are quarantined.
2. Mechanical inspection: Check DIN-rail latch, cage-clamp or screw terminals, ventilation openings, mounting feet, and signs of overheating or moisture ingress.
3. No-load power-up test: Apply 85–264 VAC input and confirm stable startup, LED indication, and normal operation without fault alarms.
4. Dual-output verification: Measure both output channels independently. Confirm each channel delivers approximately 24.7 VDC and that isolation between outputs is maintained.
5. Load and ripple check: Use an electronic load or resistive load bank to verify voltage regulation at partial and full load. Check output ripple, transient response, and overload/short-circuit behavior before repacking.

All units are packed in anti-static, moisture-controlled packaging with terminal protection.

 

Installation Pitfalls & Guide (Engineer to Engineer)

❗ Do not treat this as a single 10 A 24 VDC supply. The LWN2660-6EG provides two isolated 5 A channels. Paralleling the outputs without manufacturer approval can cause circulating current, uneven loading, or premature failure.

❗ Verify load balance across both channels. If one channel is heavily loaded while the other is idle, thermal stress and regulation behavior may differ from expectations. Distribute loads according to the product documentation.

❗ Confirm input type before energizing. This unit accepts 85–264 VAC and 90–350 VDC. Applying an incorrect DC voltage or feeding AC into a DC-only circuit upstream can damage the supply or upstream protection devices.

❗ Respect isolation requirements. The two outputs are electrically isolated. Do not bond them together in the field unless the installation manual explicitly permits it.

Replacement steps:

1. Pre-install: Confirm input voltage, output load per channel, isolation requirements, DIN-rail space, and wiring size.
2. Removal: Isolate AC/DC input, verify zero voltage, label all output circuits, and disconnect terminals.
3. Install: Mount on 35 mm DIN rail, connect protective earth, wire input, then wire each output channel separately.
4. Power-on test: Measure both outputs, confirm LED status, check load stability, and verify isolation between channels.

 

Technical FAQ

Is the samN2660-6?
No. The LWN2660-6 is commonly referenced as a single 24 VDC, 10 A, 240 W supply, while the LWN2660-6EG is a dual-output 24.7 VDC, 5 A + 5 A, 247 W unit with improved EMC performance. They are not direct replacements without rechecking the load architecture.

2. What does the “EG” suffix mean?
The “E” indicates improved EMC performance compared with older non-E models. The “G” typically denotes RoHS-compliant construction in this product family.

3. Can the two outputs be paralleled for higher current?
Not by default. The outputs are isolated, and paralleling them requires explicit confirmation from the manufacturer’s documentation. Without approval, paralleling may cause instability or damage.

4. Can it run from a DC source?
Yes. The unit supports 90–350 VDC input in addition to 85–264 VAC. Verify upstream fusing, polarity, and local electrical standards before connecting DC input.

5. What is the warranty on surplus stock?
Warranty depends on condition and supplier policy. New original units typically carry a standard warranty, while surplus inventory may have shorter coverage. Confirm terms before ordering.