The ControlLogix DC Power Supply Allen-Bradley 1756-PB50 is a 24VDC input power supply for ControlLogix chassis, delivering up to 60W of power for backplane and I/O module operation without consuming a slot.

Features and benefits

Slotless Installation: Mounts in the dedicated left-side chassis slot, preserving all I/O slots for modules.

Robust DC Input: Wide 18-32VDC input range with 24VDC nominal ensures stable operation with common industrial power sources.

High-Capacity Output: Delivers multiple voltage rails (5.1V, 24V, etc.) with ample current to power a full rack of controllers and I/O modules.

Extended Compatibility: Certified for use with ControlLogix Series A, B, and C chassis (e.g., 1756-A4, A7, A10, A13, A17).

Critical Hold-Up Time: Maintains output for 30-40ms during input dips, protecting the control system from brief power interruptions.

Industrial Durability: Designed for harsh environments with a 0-60°C operating range and high shock/vibration tolerance.

FAQ

Q1: What is the main function of the 1756-PB50?

A1: It is the dedicated DC power supply unit that provides all necessary regulated voltages (5.1V, 24V, etc.) to power a ControlLogix chassis and its modules.

Q2: Where is this power supply installed in the chassis?

A2: It is mounted in the designated left-side slot of the ControlLogix chassis and does not occupy any regular I/O module slots.

Q3: What input voltage does it accept?

A3: It accepts a wide DC input range of 18–32V DC, with 24V DC as the nominal operating voltage.

Q4: Does it offer protection against brief power interruptions?

A4: Yes, it provides a hold-up time of 30–40 ms during input voltage dips, allowing for an orderly system shutdown if needed.

Q5: Which chassis models is the 1756-PB50 compatible with?

A5: It is compatible with ControlLogix Series A, B, and C chassis, including models 1756-A4, A7, A10, A13, and A17.