Allen-Bradley 1606-XLS Modules – 1606-XLS240EA

Technical Dossier

Product Details And Specifications

Allen-Bradley 1606-XLS Series Technical Notes

The Allen-Bradley (Rockwell Automation) 1606-XLS series represents one of the most widely deployed 24 VDC DIN-rail power supply families in global heavy industry. Installed across petrochemical refineries, nuclear power facilities, offshore platforms, chemical processing plants, and continuous-process manufacturing lines, the 1606-XLS bulletin is the de facto standard for 24 VDC panel power in Rockwell-integrated control architectures. Its wide input voltage range (85–264 VAC), high efficiency (up to 95%), and active power factor correction (PFC) make it compatible with unstable grid conditions common in remote industrial sites. The series spans output power ratings from 40 W to 960 W, covering single-axis machine control panels through large-scale distributed control system (DCS) marshalling cabinets.

The Evolution of 1606-XLS Architecture

Rockwell Automation introduced the Bulletin 1606 power supply family as a replacement for legacy transformer-based panel power solutions. The original 1606-XL series established the physical form factor and DIN-rail mounting convention. The 1606-XLS generation introduced switch-mode topology with active PFC, replacing passive correction methods and enabling compliance with IEC 61000-3-2 harmonic limits — a requirement for CE-marked installations in the European Union.

The EA suffix variants (e.g., 1606-XLS240EA) added enhanced diagnostics: a DC-OK relay output, adjustable output voltage trimming (22.5–28.5 VDC), and an alarm contact for integration with PLC digital input modules. The EE suffix variants introduced parallel redundancy capability via an integrated ORing diode, enabling N+1 redundant power architectures without external ORing modules. The XLSRED sub-series provided a dedicated redundancy module for pairing two standard XLS units into a fault-tolerant supply.

As of 2024, the 1606-XLS series is classified by Rockwell Automation as mature/end-of-life for several sub-models. Replacement guidance points toward the 1606-XLP and 1606-XLE series. However, installed base volumes across legacy DCS and safety instrumented system (SIS) panels mean that 1606-XLS spare parts remain in active demand for lifecycle extension programs through 2035 and beyond.

1606-XLS Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified production range of the Allen-Bradley 1606-XLS bulletin. Each entry is classified by output power, feature set, and primary application context.

1606-XLS40E: 40 W / 24 VDC output; compact single-phase supply for low-load I/O panels.
1606-XLS80E: 80 W / 24 VDC; standard single-phase supply for mid-density I/O racks.
1606-XLS80EA: 80 W / 24 VDC with DC-OK relay output and adjustable voltage trim; alarm-capable variant.
1606-XLS120E: 120 W / 24 VDC; high-current single-phase supply for mixed analog/digital I/O marshalling.
1606-XLS120EA: 120 W / 24 VDC with DC-OK relay and voltage trim; enhanced diagnostics for SIS applications.
1606-XLS240E: 240 W / 24 VDC; primary supply for ControlLogix and CompactLogix chassis power distribution.
1606-XLS240EA: 240 W / 24 VDC with DC-OK relay, adjustable output, and alarm contact; the most widely specified variant in DCS marshalling cabinets.
1606-XLS240EE: 240 W / 24 VDC with integrated ORing diode; designed for N+1 redundant parallel operation without external hardware.
1606-XLS480E: 480 W / 24 VDC; high-power supply for large I/O panels and multi-chassis power distribution.
1606-XLS480EA: 480 W / 24 VDC with DC-OK relay and alarm contact; used in critical process control panels requiring fault annunciation.
1606-XLS480EE: 480 W / 24 VDC with integrated ORing diode; redundant-capable high-power variant.
1606-XLS960E: 960 W / 24 VDC; highest-output XLS unit; used in large marshalling cabinets and centralized 24 VDC bus systems.
1606-XLSRED40: Redundancy module for paralleling two 1606-XLS40E units; provides load sharing and automatic failover.
1606-XLSRED80: Redundancy module for paralleling two 1606-XLS80E units; N+1 fault-tolerant architecture without ORing diodes.
1606-XLS240-UPS: 240 W UPS-capable variant with battery backup interface; maintains 24 VDC output during AC power interruption for controlled shutdown sequences.
1606-XLE80E: Entry-level replacement series; 80 W / 24 VDC; functionally equivalent to XLS80E with updated firmware diagnostics.
1606-XLE240E: 240 W replacement-series unit; direct form-fit-function substitute for 1606-XLS240E in retrofit applications.

Sourcing Hard-to-Find & Obsolete 1606-XLS Parts

Q: Can you support multi-unit or repeat RFQ requests?
A: Yes. Send the model list, target quantity and destination so DRIVEKNMS can review sourcing options and quote the requirement as a project RFQ.

Quality Control for the 1606-XLS Range

The 1606-XLS series uses a switch-mode power conversion topology with an internal high-frequency transformer, active PFC front end, and output filter stage. Quality verification for these units requires specialized DC load bank testing rather than simple continuity checks.

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.