The Allen-Bradley 1762-IQ8OW6, also cataloged as the 1762IQ8OW6 Digital Combo Module, operates as a dedicated hardware component for discrete signal acquisition and relay control output within MicroLogix system controllers.

Model Variant & Ordering Matrix

• 1762-IQ8OW6: Standard factory combination module featuring 8 sink/source 24 VDC inputs and 6 relay outputs.
• 1762IQ8OW6 / 1762-IQ8OW6/A: Base model designation and revision A hardware identification code sharing identical electrical terminal interfaces.

Technical Data Summary

Deterministic Bus & I/O Density Integration

The module manages input and output processing through a high-speed ribbon cable connection to the MicroLogix expansion bus. It achieves backplane bus communication velocity and I/O density scaling across the controller system without requiring extra external power supplies for logic processing. The firmware flash compatibility ensures synchronized scan cycles with the base processor, mitigating signal propagation delays across all 14 physical channels.

Delivery & Packaging Specifications

• 1 x 1762-IQ8OW6 Combination Input/Output Module
• 1 x Removable Terminal Block Cover
• 1 x Bus Expansion Ribbon Cable Assembly
• 1 x Installation Instruction Leaflet

Wiring & Mounting Protocols

DIN-Rail and Panel Mounting

• Secure the unit onto a standard 35 mm DIN rail or bolt directly to a backplate using mounting screws.
• Maintain a minimum clearance of 50 mm on all sides to promote convection cooling and eliminate thermal buildup.

Cable Routing & Shielding Guidelines

• Separate 24 VDC input wiring from high-voltage AC load lines to prevent noise coupling.
• Keep wiring runs under 30 m for DC inputs to minimize voltage drop and electromagnetic susceptibility.
• Torque terminal block screws to a maximum of 0.56 Nm (5 lb-in) to avoid strip damage.

Technical Operational FAQs

• How does the module handle sink and source DC inputs?

  The 8 input channels are grouped into a common return layout that accommodates both sinking and sourcing configurations based on field sensor wiring.

• What is the response delay time for the relay output contacts?

  The mechanical relay contacts feature a maximum turn-on and turn-off response time of 10 ms under nominal electrical loads.

• Can the module be replaced while the controller is powered?

  No. Removal or insertion under power is not supported and may result in backplane logic damage or unpredictable system operation.

• What thermal considerations apply to the maximum relay output load?

  Continuous contact current must be derated when operating near the upper ambient temperature limit of 55 deg C to prevent thermal coil stress.

• What is the isolation rating between inputs and backplane bus?

  The input circuits provide optocoupler isolation rated at 500 VAC continuous voltage withstand relative to internal backplane logic.

• How is power supplied to the internal module logic?

  Logic power is drawn directly from the MicroLogix expansion bus at 5 VDC and 24 VDC, requiring no external supply for internal operations.

• Does the unit include built-in surge suppression for relay contacts?

  No internal contact suppression is provided. External surge suppressors, such as RC networks or diodes, must be installed across inductive loads.

• What wire size range does the terminal block accept?

  The integrated screw terminal block accepts solid or stranded copper wire sizes ranging from 0.25 to 2.5 sq mm (22 to 14 AWG).