1756-PA30XT Allen-Bradley ControlLogix XT Power Supply

1756-PA30XT Allen-Bradley ControlLogix-XT Power Supply

Product Introduction

The 1756-PA30XT belongs to the ControlLogix-XT extended temperature series. Rockwell Automation designed this power supply for harsh environments. It accepts an AC input from 85 to 265V AC (nominal 120-240V AC). The module then provides 30W maximum output power to your ControlLogix chassis. You will find four output rails: 1.5A at 1.2V, 2A at 3.3V, 6A at 5.1V, and 1.25A at 24V. Additionally, the 1756-PA30XT offers reinforced insulation with 250V continuous isolation. Its compact dimensions are 14.0 x 7.8 x 14.5 cm, and it weighs only 0.77 kg.

Key Technical Specifications

The 1756-PA30XT operates with an input frequency range of 47 to 63 Hz. Maximum input power reaches 50W (60 VA). Inrush current is limited to 20A maximum. Isolation voltage stands at 250V continuous, tested at 3250V DC for 60 seconds. For wiring, use 14 AWG (2.5 mm²) stranded or solid copper wire. The insulation rating must be 90 °C (194 °F) or higher, with maximum insulation thickness of 1.2 mm.

Furthermore, the 1756-PA30XT includes an annunciator port for status indication. This port operates at 240V AC, 50/60 Hz. Wire category 1 applies to power ports, while category 3 applies to annunciator ports. Screw torque specification is 0.79 N·m (7 lb·in).

Extreme Temperature Performance

The "XT" suffix stands for extended temperature. The 1756-PA30XT works reliably from -25 to 70 °C (-13 to 158 °F). When combined with other ControlLogix-XT components, the entire system withstands even lower temperatures down to -25 °C. Storage temperature ranges from -40 to 85 °C. Relative humidity tolerance is 5% to 95% non-condensing. Moreover, the module handles operating shock up to 30g.

Chassis Compatibility and Mounting

You must install the 1756-PA30XT in the leftmost slot of any 1756 chassis. Compatible chassis include the 1756-A4LXT/B, 1756-A5XT/B, 1756-A7LXT/B, 1756-A7XT/B, 1756-A7XT/C, and 1756-A10XT/C. The module uses an open-style enclosure. Therefore, you need to install it inside a suitable control cabinet. No additional enclosure is required on the module itself.

Installation Guidelines

First, confirm that the chassis is completely powered off before inserting the 1756-PA30XT. Next, slide the module into the leftmost slot until the top and bottom latches snap securely. Then, connect the AC supply wires to the terminal block. Use copper conductors only (solid or stranded). Tighten the screws to exactly 0.79 N·m. Additionally, keep the annunciator wiring separate from power wiring to avoid noise. Finally, apply power and verify the green status LED illuminates.

The 1756-PA30XT is rated for pollution degree 2 environments. It is intended for industrial use in Zone 2 hazardous locations. Access to the module should require a tool. Never disconnect the power supply module unless the area is proven safe and power is removed.

Typical Applications

You will find the 1756-PA30XT in oil and gas facilities, outdoor automation cabinets, and extreme climate manufacturing plants. It also suits cold storage warehouses and high-temperature kiln areas. For redundant power configurations, you can use two units together to build a redundant power system. This increases system availability for critical processes.

Packaging List

• 1756-PA30XT power supply module – 1 unit

• Removable terminal block (power connector) – 1 piece

• Annunciator terminal block – 1 piece

• Installation instruction sheet – 1 copy

Note: No certificates or warranty documents are included in the package.

Shipping

We ship via FedEx, UPS, or DHL. Standard transit time is 3–7 business days depending on your destination.

Frequently Asked Questions (FAQ)

1. Can I use the 1756-PA30XT with a standard ControlLogix chassis?
Yes, it fits all 1756 chassis. However, for full XT system benefits, pair it with XT-rated chassis and I/O modules.

2. What is the difference between 1756-PA30XT and the standard 1756-PA30?
The XT version supports extended temperature range (-25 to 70 °C) and includes conformal coating for harsh environments.

3. Does the 1756-PA30XT support redundancy?
Yes. You can use two units to create a redundant power supply configuration. Both modules install in the same chassis.

4. What happens if the input voltage drops below 85V AC?
The 1756-PA30XT will shut down or become unstable. Operation requires at least 85V AC at the input terminals.

5. How do I know if the 1756-PA30XT is functioning correctly?
Check the green status LED on the front panel. A steady green light indicates normal operation. No light means no input power or internal fault.