1606-XLS960E-3 — 960W Three-Phase DIN Rail Power Supply with SFB, 24V DC / 40A

The 1606-XLS960E-3 is a high-power 24V DC DIN rail power supply accepting three-phase AC input, delivering up to 40A continuous at 960W. It carries the same Selective Fuse Bridging (SFB) behavior as the smaller single-phase XLS units, scaled up for panels with substantial 24V DC field power demand — multi-axis servo control cabinets, large I/O racks with dozens of output points, or process panels where one centralized supply replaces several smaller units.

Specifications

Parameter	Value
Part Number	1606-XLS960E-3
Output Voltage	24V DC (adjustable 24–28V DC)
Output Current	40 A continuous
Output Power	960 W
Input Voltage	3-phase AC (380–500V AC range, model dependent)
Selective Fuse Bridging	Yes — boost current to clear downstream fuses on fault
Efficiency	≥ 90% at full load
NEC Class 2	Yes
Mounting	35 mm DIN rail
Operating Temperature	−25°C to 60°C (derate above 50°C)

Sizing and Branch Protection at 40A

Segment the 24V output into multiple fused branches rather than running all 40A through a single unprotected distribution point — this isolates faults to the affected branch instead of risking the full rated current flowing through one wiring run.
Size each branch fuse to clear reliably within the SFB boost window while staying above the branch's normal operating current to avoid nuisance trips.
Verify the three-phase input wiring and protection device (breaker or fuse set) match the supply's nameplate input current and the facility's available fault current rating.
At 40A output, conductor sizing on the DC side matters — undersized output wiring introduces voltage drop and heating that compounds at this current level more than it would on a smaller supply.

FAQ

Q: Can this supply run from a single-phase source if three-phase isn't available?

No. This model is designed for three-phase AC input. For single-phase applications at lower power, the smaller single-phase XLS models (120W, 240W) are the appropriate choice instead.

Q: Is parallel redundancy supported the same way as smaller XLS units?

Parallel operation for redundancy or capacity expansion follows the same general approach — trimming one unit's output slightly higher than the other — but verify compatibility and current-sharing behavior against the specific redundancy module rated for this power class before implementing.

Q: How many branch fuses should a 40A output typically be split into?

This depends entirely on the panel's load distribution — group loads logically by function or location, then size each branch fuse for that group's expected current while keeping the total within the supply's rated output. There's no fixed number; it follows the application's wiring architecture.

Q: Does the three-phase input require a specific phase rotation?

Most three-phase rectifier-based power supplies tolerate either phase rotation without requiring a specific sequence, since they don't rely on rotation direction the way a motor would. Confirm against the specific unit's installation documentation if rotation sensitivity is a concern for the installation.

1606-XLS960E-3 New Factory Sealed 1606XLS960E3 Power Supply Module