1606-XLB240E | Allen-Bradley | Power Supply

Configured for power conversion in industrial control cabinets, the Allen-Bradley 1606-XLB240E (1606-XLB240E Power Supply) provides direct physical execution of regulated 24-28 VDC output from a single-phase AC source. This unit serves as the primary power component within 1606-XLB series platforms, facilitating the conversion of 100-240 VAC input into stable DC voltage required for logic and instrumentation circuitry.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks & Firmware Flash Compatibility

The 1606-XLB240E provides the underlying DC bus stability required for deterministic operation of I/O and communication modules. While this power supply does not incorporate network logic, its output consistency is critical for maintaining I/O density scaling and preventing reset cycles in connected PLC modules. Users must ensure that the total load connected to the output does not exceed the 240 W rating, as voltage sagging under overcurrent conditions will disrupt backplane bus communication velocity and may trigger diagnostic faults in sensitive network-attached hardware.

Frequently Asked Questions

Q: Can multiple 1606-XLB240E units be connected in parallel for increased power capacity?

A: Operation in parallel is only permitted if the specific model configuration supports load sharing. Review the technical manual for the 1606-XLB series to confirm if active load balancing is supported, as standard configurations are intended for standalone use.

Q: Is the output voltage adjustable within the 24-28 VDC range?

A: Yes. The output voltage is user-adjustable via the front-mounted potentiometer to compensate for voltage drops across long cable runs. Always verify the output voltage with a multimeter at the load terminals before energizing downstream equipment.

Field Installation Guidelines

• Thermal Management: Install the unit vertically on a DIN-rail to ensure adequate convective airflow through the internal heat sink. Maintain a minimum clearance of 50 mm above and below the housing to prevent thermal throttling.
• Wiring Standards: Utilize copper conductors rated for the maximum output current of the supply. Ensure all AC input and DC output terminals are tightened to the specified torque to prevent resistive heating at the connection point.
• Grounding: Connect the PE (Protective Earth) terminal on the supply to the cabinet's protective earth bus. Proper bonding is mandatory for surge protection and to provide a return path for electromagnetic interference.
• Input Protection: Ensure the supply is protected by an appropriately sized circuit breaker or fuse on the AC input side, as required by local electrical codes and the specific installation environment.