Product Overview of the Allen-Bradley 1769-PA4

The Allen-Bradley 1769-PA4 is a CompactLogix I/O power supply. It belongs to the 1769 Compact I/O product family. This module powers the backplane for CompactLogix controllers and I/O modules. The 1769-PA4 distributes power to both sides of the unit. You can connect up to eight (8) modules on each side. This gives a total capacity of 16 Compact I/O modules per power supply. It works perfectly with CompactLogix L3x processors and MicroLogix 1500 systems.

Technical Specifications

Input and Output Ratings

The 1769-PA4 has a selectable input voltage range. You can choose 85 to 265V AC or 170 to 265V AC. The nominal input is 120/220V AC. Input frequency range is 47 to 63 Hz. Power consumption reaches 200 VA at 120V AC and 240 VA at 240V AC. Maximum inrush current is 25 A at 132V AC. The 1769-PA4 provides 4.0A at 5V DC and 2.0A at 24V DC. Power dissipation is 8W at 60 °C (140 °F). Continuous isolation voltage is 265V from AC input to the system.

Mechanical and Environmental Data

The 1769-PA4 measures 118 x 70 x 87 mm (4.65 x 2.76 x 3.43 in.). Height with mounting tabs is 138 mm (5.43 in.). It weighs approximately 525 g (1.16 lb). Operating temperature ranges from 0 °C to 60 °C (32 °F to 140 °F). Storage temperature is -40 °C to 85 °C (-40 °F to 185 °F). Relative humidity tolerance is 5% to 95% without condensation. Shock rating is 30g. Vibration rating is 5g at 10 to 500 Hz. The enclosure type is open style.

Wiring, Fuse, and Compatibility

Use 22 to 14 AWG solid copper wire for installation. For stranded wire, use 22 to 16 AWG. Wire insulation must handle 90 °C (194 °F) or greater. The 1769-PA4 includes an internal replaceable fuse. Compatible fuse types are Littelfuse 02153.15MXP or Wickmann 19195-3.15A. The power supply distance rating is 8 modules per side. This module supports both DIN rail mounting and panel mounting. A green LED status indicator shows power-on status.

Installation Guidelines

Mount the 1769-PA4 on a standard DIN rail or a flat panel. Use the upper and lower DIN rail latches for rail mounting. For panel mounting, use the tongue-and-groove slots and mounting tabs. Always select the correct input voltage range before energizing the 1769-PA4. The voltage selector switch is located on the module. Turn off all power before wiring the terminal block. The terminal block has a finger-safe cover for safety. Place the 1769-PA4 at the beginning or middle of your I/O bank. Remember that up to 8 modules connect to each side.

Package Contents

• Allen-Bradley 1769-PA4 I/O Power Supply Module (1 unit)
• Removable terminal block with finger-safe cover
• Power supply door with identification label
• Replaceable fuse (installed – Littelfuse or Wickmann type)
• Quick start installation guide

Note: No certificate or warranty document is included in the package.

Frequently Asked Questions (FAQ)

Q1: How many I/O modules can the 1769-PA4 support?
A1: The 1769-PA4 supports up to eight (8) modules on each side. This provides a total of 16 Compact I/O modules per power supply.

Q2: What are the output current ratings of the 1769-PA4?
A2: The 1769-PA4 provides 4.0 Amps at 5V DC and 2.0 Amps at 24V DC to the backplane.

Q3: Can I replace the fuse inside the 1769-PA4?
A3: Yes, the 1769-PA4 has a replaceable fuse. Use Littelfuse 02153.15MXP or Wickmann 19195-3.15A.

Q4: Does the 1769-PA4 work with MicroLogix 1500?
A4: Yes, the 1769-PA4 is compatible with MicroLogix 1500 base units and CompactLogix controllers.

Q5: What does the LED indicator on the 1769-PA4 show?
A5: The green LED on the 1769-PA4 indicates that the power supply is operating normally. No light means no output power.