Allen-Bradley 1606-XLSRED40 40A MOSFET Redundancy Module
Product Introduction
The 1606-XLSRED40 is a dual-input MOSFET redundancy module from the Allen-Bradley Bulletin 1606-XL series. It decouples two independent DC power sources to build 1+1 redundant architectures in industrial control panels. Unlike diode-based modules, this unit uses low-loss MOSFET decoupling, which sharply reduces voltage drop and heat generation. Engineers commonly deploy it in process automation, safety systems, and continuous-production lines where power continuity is critical.
Technical Specifications
The module accepts a DC input voltage range of 8.4 to 36.4 V. Each input carries 20 A, and the unit combines both channels into a 40 A nominal output. A short-circuit condition can push output current to 65 A maximum. Output voltage spans 12 to 28 V DC nominal, matching the source rating.
MOSFET decoupling isolates the two inputs while keeping losses low. Specifically, the nominal voltage drop measures just 72 mV, far below diode-based alternatives. This low drop reduces heat inside the enclosure and improves overall system efficiency. Approvals include UL 60950-1, cUL, and CE marking under the official Bulletin 1606 series standard.
No communication ports or protocols exist on this device. Specifically, it performs purely electrical decoupling with no data interface.
Mechanical and Environmental Parameters
Dimensions measure 124 mm (H) × 36 mm (W) × 127 mm (D), and the unit weighs 340 g. Housing is a DIN rail mount construction rated IP20. Operating temperature spans -40 to +70 °C, while storage tolerates -40 to +85 °C. Relative humidity ranges from 5 to 95% non-condensing.
Installation Guide
First, mount the 1606-XLSRED40 on a standard DIN rail inside the control enclosure. Next, wire each power supply to a separate input terminal and confirm polarity. Then connect the combined output to the load bus. Meanwhile, verify input voltages fall within the 8.4 to 36.4 V DC range before energizing. Finally, check the output voltage after power-up; the low 72 mV drop means supply settings need little adjustment. In addition, keep wiring short to minimize extra losses.
Packaging List
1 × Allen-Bradley 1606-XLSRED40 redundancy module
1 × Installation instruction sheet
Shipping via Fedex, UPS, DHL
FAQ
Q1: What is the purpose of the 1606-XLSRED40?
A: It decouples two DC power supplies for 1+1 redundancy, so one failed source does not interrupt the load.
Q2: What output current does this module support?
A: It provides 40 A nominal output, with 65 A maximum during short-circuit conditions.
Q3: How does MOSFET decoupling differ from diode decoupling?
A: MOSFET decoupling cuts voltage drop to 72 mV, reducing heat and improving efficiency.
Q4: Does it have any communication interface?
A: No. The 1606-XLSRED40 offers no ports or protocols; it is purely an electrical decoupling device.
Q5: Is the 1606-XLSRED40 still active?
A: Yes. Rockwell lists it as active in Bulletin 1606-TD002H (July 2023) technical data.
