Connecting a Qscan barcode reader to a Mercury Controller

2026-05-22Last updated

In situations where you need to use a Qscan barcode reader to access parking entrances, turnstiles, or gated facilities, you must connect a Qscan barcode reader to a Mercury controller. This ensures that the barcode reader can communicate with Security Center Synergis™ to manage access.

What you should know

  • This procedure is for system integrators or Account administrators who install and configure barcode scanners.
  • This scenario describes how to connect a Qscan barcode reader to a Mercury MP1502 controller.
Warning:
Do not look directly into the Qscan barcode reader or the laser may cause permanent vision damage.

Procedure

  1. Connect your Qscan barcode reader device to the Reader 1 connection block in the Mercury MP1502 controller.
    Figure 1. Qscan barcode reader
    Qscan barcode reader.
    Figure 2. Mercury MP1502 controller board wiring loom connections
    Mercury MP1502 controller board with wiring loom connections highlighted.
  2. Review the following table to understand how to connect the Qscan barcode reader wires to the terminals on the Mercury controller Reader 1 connector block.
    Table 1. Mercury controller and Qscan reader wiring connections
    Mercury MP1502: Reader 1 connections Qscan barcode reader: wire colors
    GND (Ground) BLUE
    DAT D0 (Data/Data 0/TR-) GREEN
    CLK D1 ( Clock/Data 1/TR+) WHITE
    BZR (Reader Buzzer) Not applicable
    LED (Reader LED) ORANGE
    V0 (Reader Power) RED

After you finish

Configure Qscan barcode reader to support 40-bit hexadecimal QR codes