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    SECO-LARM VC-2VAQ / BNC Video Converters — User Manual

    September 08, 2026 3 min read

    Manual for the SECO-LARM BNC Video Converters, including the VC-2VAQ VGA-to-BNC converter.

    💾 Download Original PDF 🛒 View Product
    Full text manual (for reference)

    Manual for the SECO-LARM BNC Video Converters — a family of compact video signal converters covering BNC-to-VGA (VC-1 and VC-3 Series) and VGA-to-BNC (VC-2 Series, including the VC-2VAQ) conversion, letting security installers use a standard VGA monitor with a CCTV/BNC video source, or vice versa.

    Model Overview

    Model Conversion Power Adapter Included?
    VC-1BAQ BNC to VGA Included
    VC-1BBQ BNC to VGA Not included
    VC-3BAQ* BNC to VGA (high resolution) Included
    VC-3BBQ* BNC to VGA (high resolution) Not included
    VC-2VAQ** VGA to BNC Included
    VC-2VBQ** VGA to BNC Not included

    *VC-3 Series includes an additional BNC loop-through. **VC-2 Series includes an additional VGA loop-through.

    Introduction

    The SECO-LARM BNC to VGA converters (VC-1/VC-3 Series) transform a BNC/composite video signal into VGA, so a traditional CCTV monitor can be replaced by any VGA display — including VESA-mountable monitors. The SECO-LARM VGA to BNC converter (VC-2 Series, e.g. VC-2VAQ) does the reverse: it converts a VGA signal (from a DVR or computer) to be displayed on any TV, projector, or device using a standard BNC connector, while simultaneously outputting to a VGA monitor.

    Features

    BNC to VGA (VC-1 / VC-3 Series)

    • Converts almost any VGA monitor into a security monitor.
    • Compact, plug-and-play; desktop, wall, or VESA mountable.
    • On-screen display (OSD) for image adjustment; automatically detects NTSC/PAL; video input auto-configure.
    • Memory retains settings after power failure.
    • Dual VGA + BNC output supporting resolutions up to 1280x1024 (VC-3BxQ only).

    VGA to BNC (VC-2 Series)

    • Connect a DVR with VGA output to an existing monitor with BNC input.
    • Video standards: NTSC/PAL; auto-configure resolution up to 1024x768 (up to 75Hz).
    • Dual output ports: composite video (BNC) and VGA.
    • On-screen display (OSD) for brightness, contrast, hue, saturation, sharpness, and more.
    • Quick installation, no driver or operating system requirements.

    Specifications

    Model VC-1BAQ/VC-1BBQ VC-3BAQ/VC-3BBQ VC-2VAQ/VC-2VBQ
    Conversion type BNC to VGA VGA to BNC
    Input signal Composite video 1Vp-p 75ohm BNC jack VGA
    Current consumption 200mA@5VDC 800mA@5VDC 500mA@5VDC
    Maximum resolution NTSC 720x480 / PAL 720x576 Up to 1280x1024; NTSC 720x480 / PAL 720x576 Up to 1024x768; NTSC 720x480 / PAL 720x576
    Power source 1A@5VDC, 2.5mm barrel connector
    Operating temperature 32°F to 131°F (0° to 55°C)
    Dimensions 5-3/4"x2-5/8"x1-1/16" (145x67x27mm) 3-3/8"x3-1/4"x1-1/16" (85x83x27mm) 4-13/16"x3-3/16"x1-1/16" (122x81x27mm)
    Weight 7.8oz (220g) 7.2oz (205g) 9.3oz (265g)

    Installation

    1. Determine the mounting location for the BNC/VGA converter; attach the VESA mount bracket if needed.
    2. Plug the BNC cable into the female BNC port on the converter.
    3. Plug the VGA cable into the female VGA port (or the BNC cable into the BNC port, depending on model).
    4. Plug in the 5VDC power adapter.
    5. Turn on the display and the video source/output device.
    6. Use the OSD menu to adjust brightness, contrast, tint, and color until the picture displays correctly.
    7. Adjust monitor settings per the manufacturer's instructions if needed.

    Parts included: 1x converter, 1x VESA-compatible mounting bracket, 4x VESA mount screws, 4x monitor mount screws, 4x wall mount screws, 4x plastic wall anchors, 4x rubber feet, 1x manual, and (except on the "B" suffix models) a 5VDC power adapter.

    Note for VC-2VxQ: First select either NTSC or PAL using the front-panel DIP switch (both switches ON = NTSC, both OFF = PAL; default is NTSC).

    OSD Menu Options

    OSD Setting Available On Description
    Brightness / Contrast / Color Saturation / Tint-Hue All models Standard picture adjustments
    Sharpness VC-3BxQ, VC-2VxQ Definition of displayed images
    Resolution VC-3BxQ 640x480, 800x600, 1024x768, or 1280x1024 (1280x1024 only on VC-3BxQ)
    Horizontal / Vertical Size, Flicker, OSD Background VC-2VxQ Image geometry and OSD appearance

    Troubleshooting

    Issue Check
    Video device does not function correctly Power, input, and output cables firmly connected; input/output devices powered on; test coaxial and VGA cables; confirm monitor supports the needed resolution (720x480 for VC-1BxQ; selected resolution for VC-3BxQ); confirm NTSC/PAL DIP switches are set correctly for VC-2VxQ.
    Power LED indicator not lit Confirm power is connected to the converter.

    Warranty

    Warranted against defects in material and workmanship for one (1) year from date of sale to the original customer. SECO-LARM's obligation is limited to repair or replacement of the returned (transportation prepaid) unit.

    SECO-LARM U.S.A., Inc. — 16842 Millikan Avenue, Irvine, CA 92606 | (949) 261-2999 / (800) 662-0800 | www.seco-larm.com