Allen-Bradley 1771-P7 24VDC 2A Power Supply Module for 1771 Chassis

Product Overview

The Allen-Bradley 1771-P7 is a 24 VDC power supply module designed for 1771 I/O chassis. It accepts 120/240 VAC input and provides a regulated 2 A, 24 VDC output to power the chassis and installed modules.

Technical Specs

• Input: 120/240 VAC (auto-selecting), 47–63 Hz
• Output: 24 VDC ±5%, 2.0 A continuous
• Output power: 48 W maximum
• Hold-up time: 20 ms minimum at full load
• Slot: Leftmost position of the 1771 chassis
• Operating temperature: 0–60 °C

Key Features

• Dedicated 24 VDC supply for 1771 racks
• Auto-ranging AC input
• Sufficient capacity for moderate I/O loads
• Standard form factor for Series A/B/C chassis

FAQ

• Output? 24 VDC at 2 A.
• Input? 120/240 VAC auto-select.
• Slot? Leftmost chassis position.

Installation Guide

1. Install the power supply in the leftmost slot of the 1771 chassis.
2. Connect AC input power with appropriate fusing.
3. Verify output voltage after power-up.
4. Calculate total module load to ensure it stays within 2 A.
5. Monitor for proper chassis power indication.

Selection Tips

• Use when a 24 VDC chassis supply is required.
• For higher current needs consider larger 1771 power supplies (P4/P6 class).
• Essential spare for 1771 chassis power reliability.