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    On-Q/Legrand MDU Mounting Bracket (AC1042) & TRIO Combo Modules (CO1156/CO1166) — Installation Instructions

    September 08, 2026 1 min read

    Installation instructions for the On-Q/Legrand MDU Mounting Bracket (AC1042) and TRIO Combo Modules (CO1156 Cat5e / CO1166 Cat6).

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    Full text manual (for reference)

    Installation instructions for the On-Q/Legrand MDU Mounting Bracket and TRIO Combo Modules.

    Overview

    This installation sheet covers the AC1042 MDU Mounting Bracket (blank) and its companion TRIO Combo Modules — CO1156 (with Cat5e) and CO1166 (with Cat6). The mounting bracket and combo modules snap together to create a modular multi-dwelling-unit (MDU) wiring interconnect.

    What's Included

    • AC1042 — MDU Mounting Bracket (blank)
    • CO1156 — TRIO Combo Module with Cat5e
    • CO1166 — TRIO Combo Module with Cat6

    Installation Steps

    1. Screw the splitter to the top of the mounting bracket.
    2. Snap the combo module(s) into the mounting bracket.
    3. Slide the mounting tabs into the enclosure slots.
    4. Push in the pins to lock the bracket into place.

    Specifications

    • Catalog numbers: AC1042, CO1156, CO1166
    • Country of origin: Made in Taiwan
    • Document number: IS-1507294 Rev A
    • Manufacturer: Legrand, 800.223.4162 (US) / 1.877.BY.LEGRAND (Canada) / www.legrand.us / www.legrand.ca