What This Unit Does
The 1606-XL240DR is a legacy Bulletin 1606-XL redundant power supply. It carries a built-in decoupling diode. That diode lets two supplies share one 24 V DC load. If one unit drops, the other keeps the rail up. Output is 24 V DC at 10 A, or 240 W. Input is single-phase 85-264 V AC. A DC OK relay gives remote status. There is no communication port and no protocol. The open-frame body clips to DIN rail. It measures 124 x 120 x 102 mm and weighs 980 g. Rating is IP20. Operating range is -10 to +70°C. Rockwell lists this model as discontinued since 2020-12-31, with no planned replacement. Panels that run redundant pairs still need this exact part.
Core Ratings
- Brand: Allen-Bradley
- Model: 1606-XL240DR
- Series: Bulletin 1606-XL, legacy line
- Function: redundant supply with decoupling diode
- Input: 85-264 V AC, single-phase
- Output: 24 V DC nominal
- Output current: 10 A nominal
- Rated power: 240 W
- Status output: DC OK relay
- Mounting: DIN rail
- Communication: none
Environment and Body
- Operating: -10 to +70°C per migrat-pp026
- Storage: not published for this legacy model
- Humidity: not published for this legacy model
- Protection: IP20, open-frame DIN design
- Size: 124 x 120 x 102 mm (H x W x D)
- Weight: 980 g per 1606-AP035A
Approvals and Lifecycle
- UL 60950-1, cUL, CE marked per Bulletin 1606 standard
- ODVA conformance listing DOC 10793 covers this catalog
- Discontinued as of 2020-12-31
- No planned Rockwell replacement
- Last verified: 2026-10
- Ask us for a test record before you order
Where It Fits
- Redundant 24 V DC pairs that already use this model
- Panels where a diode module would add extra rail space
- Process lines that cannot take a single-supply fault
- Legacy Bulletin 1606-XL cabinets facing EOL
- Spare kits for critical control rooms
- Retrofit jobs that keep the original DIN footprint
Wiring Notes
- Pair two units on the same output rail. The diode handles sharing.
- Set both outputs to the same trim point. Small trim offsets load one unit harder.
- Feed each unit from a separate AC circuit where possible.
- Wire the DC OK relay from each unit to separate PLC inputs.
- Check diode heat at full load. Leave airflow space.
- Label each unit A and B for fast service swaps.
Oiltech Controls’s Insight
- Trim mismatch is the top redundant fault. Match both units under load.
- Check the diode case temperature at full load. Heat here shortens life.
- Feed A and B from different breakers. One trip should not drop both.
- Watch both DC OK contacts. One alarm means the pair is down to one unit.
- This model is EOL with no replacement. Hold a tested spare.
- Do not mix diode and non-diode units on one rail without a check.
Oiltech Controls Review
- Engineers like the all-in-one design. No separate diode module.
- The DC OK relay makes pair health easy to watch.
- Wide 85-264 V AC input suits most plant feeds.
- Open-frame body runs cool at rated load.
- Tested units ship with a load and diode check note.
Why Buy From Oiltech Controls?
- Over 15 years in industrial automation spare parts
- Global shipping with FedEx, UPS, and DHL
- Tested industrial surplus and refurbished options
- 12-month warranty on every order
- Load and technical check before dispatch
- Support for obsolete and legacy control systems
- Dispatch in 24-28 hours for stocked items
Warranty and Dispatch
- 12-month warranty against functional defects
- Dispatch in 24-28 hours after order confirmation
- Shipping by FedEx, UPS, or DHL
- Tracking number sent at dispatch
- Foam-packed carton protects the DIN clip and terminals
FAQ
Q: Do I need an external diode module with this unit?
No. The decoupling diode is built in. That is the main reason panels use this model.
Q: How do I balance two units on one rail?
Set both trims to the same point under load. Small offsets make one unit carry more current.
Q: What does one DC OK alarm mean on a pair?
One unit is down. The rail still runs on the other. Replace the faulty unit fast.
Q: Is there a Rockwell replacement for this model?
No. Rockwell lists no planned replacement. Keep a tested spare for critical lines.
Q: How do I confirm a spare matches my redundant pair?
Send photos of both units and the panel label to info@oiltechcontrols.com. We confirm fit before you buy.
Contact Information
Email: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
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