Allen-Bradley 1762-OX6I Isolated Relay Output Module

Product Introduction

The 1762-OX6I output module from Allen-Bradley is a high-performance, isolated relay expansion unit for the MicroLogix 1100, 1200, and 1400 programmable logic controllers. This module delivers six individually isolated Form C relay outputs. Each channel includes both a Normally Open and a Normally Closed terminal, effectively functioning as a versatile switch. Consequently, you can implement automation for different devices simultaneously using a single module. The 1762-OX6I excels in applications requiring complete electrical separation between output channels, making it an ideal choice for mixed-load environments.

Technical Specifications

The 1762-OX6I features six relay output channels, and each channel enjoys complete individual isolation. This means Group 0 through Group 5 operate independently, with no shared commons between them. Each output uses a Form C contact configuration, providing both NO and NC switching options. The operating voltage range spans from 5 to 125V DC and 5 to 265V AC, offering remarkable flexibility for mixed AC/DC load switching. Each output point supports an impressive continuous current of 7 Amps, significantly higher than standard relay modules.

For signal timing, the 1762-OX6I delivers a maximum ON transition delay of 10 ms with a typical delay of 6 ms. For OFF transitions, the maximum delay is 20 ms with a typical delay of 12 ms. The module draws a bus current of 110 mA at 5V DC and 110 mA at 24V DC. Additionally, the maximum controlled load rating reaches 1440 VA, ensuring robust switching capability for demanding applications.

Mechanical and Environmental Parameters

The Allen-Bradley 1762-OX6I measures 90 x 40.4 x 87 mm (3.54 x 1.59 x 3.43 in.), and the height extends to 110 mm (4.33 in.) when including mounting tabs. It weighs only 0.485 lbs (220 g), making it lightweight and easy to handle. The module operates reliably in temperatures ranging from 0 to 55°C (32 to 131°F) and at altitudes up to 2000 meters (6561 feet). Furthermore, it carries an IP20 enclosure rating, providing basic protection against solid objects. For optimal cooling and maintenance access, you must maintain a 2-inch clearance on all sides of the module during installation. This clearance ensures adequate airflow and prevents overheating.

Installation and Wiring Guidance

Installing the 1762-OX6I requires careful planning. First, assess your environmental conditions, as the mounting method depends on vibration and shock levels. For standard environments, you can mount the module on a DIN rail using end anchors. For high-vibration applications, however, we recommend panel mounting using two Panhead screws per module. The module connects to the controller and adjacent I/O equipment via a flat ribbon cable with a female bus connector. A critical consideration involves the power supply distance rating: you must install this module 6 modules away from the host power supply. When using the 1762-OX6I with a MicroLogix 1100, you can install up to four modules. For MicroLogix 1200, it supports up to six modules, and for MicroLogix 1400, you may install up to seven modules. Also, you must introduce the 1762-OX6I properly in your hardware configuration; otherwise, the controller will not recognize it.

Typical Applications

The 1762-OX6I excels at switching a wide variety of loads, including magnetic contactors, relay coils, solenoid valves, and pilot lights. Its individually isolated channels make it particularly valuable for applications requiring separate control circuits, such as mixed-voltage systems or safety interlock circuits. Additionally, you can use it to signal RUN and START commands to variable frequency drives and motor starters. The Form C contacts also support applications needing both energize and de-energize functions from a single output point.

Packaging List

• Allen-Bradley 1762-OX6I Isolated Relay Output Module (1 unit)

• Flat ribbon cable with female bus connector

• DIN rail mounting clips (pre-installed)

• Removable terminal block connector

• Installation instruction sheet (printed)

Frequently Asked Questions (FAQ)

1. What makes the 1762-OX6I different from standard relay output modules?
The 1762-OX6I offers individual isolation for each of its six channels. This means every output operates independently with its own common, providing superior protection against cross-talk and ground loops.

2. What current can each output handle on the 1762-OX6I?
Each of the six output points supports a continuous current of up to 7A. This rating significantly exceeds standard relay modules, making it suitable for heavier loads.

3. What is a Form C contact and why does it matter?
The 1762-OX6I uses Form C contacts, which provide both a Normally Open and a Normally Closed terminal per channel. This configuration gives you more switching options, allowing you to implement both energize and de-energize functions from a single output.

4. How much clearance do I need around the 1762-OX6I?
You must maintain at least 2 inches of clearance on all sides of the 1762-OX6I. This space ensures proper airflow for cooling and provides adequate working room during installation and maintenance.

5. Which controllers work with the 1762-OX6I?
The 1762-OX6I works seamlessly with MicroLogix 1100, 1200, and 1400 controllers. You can add up to 4 modules for the 1100, up to 6 for the 1200, and up to 7 for the 1400 series.