Product Overview

The 1769-CRL3 belongs to the trusted Allen-Bradley CompactLogix product line. This cable is not a module or a power supply. It is a critical accessory for system expansion. You use this cable to connect a right bank to a left bank of I/O modules. It extends the bus communication lines effectively. A 1769 system uses a maximum of two such cables. This setup allows up to three I/O banks with separate power supplies.

Technical Specifications

The 1769-CRL3 offers a robust set of technical features for demanding applications.

• Manufacturer: Rockwell Automation / Allen-Bradley

• Part Number: 1769-CRL3

• Series: A and B compatible

• Cable Length: 1 meter (3.28 feet)

• Isolation Voltage: 30 Volts continuous

• Backplane Current: 1.4 Amps at 24 Volts DC

• Power Consumption: 33.6 Watts

• Power Dissipation: 7.5 Watts

Environmental & Mechanical Ratings

• Operating Temperature: 0 to 60 °C (32 to 140 °F)

• Storage Temperature: -40 to 85 °C (-40 to 185 °F)

• Relative Humidity: 5 to 95% non-condensing

• Operating Altitude: 2000 meters (6561 feet) maximum

• Operating Vibration: 10-500 Hz, 5G, 0.030 inches peak-to-peak

• Operating Shock (Panel Mount): 30G

• Operating Shock (DIN Rail Mount): 20G

• Enclosure Type: Open (for use in a suitable enclosure)

Key Functional Features

• Right-to-Left Expansion: Connects the right bank of one base to the left bank of the next.

• Bus Extension: Extends the 1769 system bus beyond a single power supply.

• Configuration Flexibility: Supports both horizontal and vertical system expansion.

• High Interference Immunity: Built for noisy industrial environments.

• Secure Connection: Latching mechanism ensures reliable contact.

Installation Guidance

Follow these steps for a proper installation of the 1769-CRL3.

1. Power Down: Always disconnect system power before handling cables.

2. Align Connectors: Match the keyed ends of the cable with the bus connectors.

3. Secure Latch: Push firmly until the side latches click into place.

4. Route Carefully: Avoid sharp bends and high-voltage power cables.

5. Verify Connection: Check that the bus status indicators show normal communication.

Only two 1769-CRL3 cables can connect up to three I/O banks. Each bank must have its own power supply. This configuration maintains system stability and performance.

Package Contents

• One (1) Allen-Bradley 1769-CRL3 Right-to-Left Expansion Cable (1 meter)

• Product documentation leaflet (installation instructions)

Frequently Asked Questions (FAQ)

1. What is the exact length of the 1769-CRL3 cable?
The 1769-CRL3 cable measures exactly 1 meter or 3.28 feet in length. It is a standard right-to-left expansion cable for the CompactLogix system.

2. Can I use more than two 1769-CRL3 cables in one system?
No, a 1769 I/O system supports a maximum of two 1769-CRL3 cables. This limit allows a total of three I/O banks with separate power supplies.

3. What is the difference between the 1769-CRL3 and a standard I/O cable?
The 1769-CRL3 is a dedicated bus extension cable for right-to-left connection. It extends communication lines between banks, unlike standard module-to-module cables.

4. Is the 1769-CRL3 compatible with both Series A and Series B?
Yes, the 1769-CRL3 works with both Series A and Series B CompactLogix components. Always verify compatibility with your specific controller manual.

5. What is the isolation voltage rating for the 1769-CRL3?
The 1769-CRL3 provides an isolation voltage rating of 30 Volts continuous. This feature ensures safe signal separation between different I/O banks.