# MP1502 — Dual Door Panel

## Overview

The Mercury MP1502 is a two-door access control panel. It supports 2 doors with up to 4 readers (2 in/2 out), 16 supervised inputs, and 8 relay outputs. Connects to a host controller via RS-485.

<table id="bkmrk-specvaluedoors2reade"><thead><tr><th>Spec</th><th>Value</th></tr></thead><tbody><tr><td>Doors</td><td>2</td></tr><tr><td>Readers</td><td>4 (Wiegand or OSDP)</td></tr><tr><td>Inputs</td><td>16 supervised</td></tr><tr><td>Outputs</td><td>8 relay</td></tr><tr><td>Communication</td><td>RS-485 to host controller</td></tr><tr><td>Power Input</td><td>12–24VDC</td></tr></tbody></table>

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## DIP Switches

The MP1502 uses an 8-position DIP switch bank to set the RS-485 board address (binary encoded, SW1=LSB).

<table id="bkmrk-addresssw1sw2sw3sw4s"><thead><tr><th>Address</th><th>SW1</th><th>SW2</th><th>SW3</th><th>SW4</th><th>SW5–8</th></tr></thead><tbody><tr><td>0</td><td>OFF</td><td>OFF</td><td>OFF</td><td>OFF</td><td>OFF</td></tr><tr><td>1</td><td>ON</td><td>OFF</td><td>OFF</td><td>OFF</td><td>OFF</td></tr><tr><td>2</td><td>OFF</td><td>ON</td><td>OFF</td><td>OFF</td><td>OFF</td></tr><tr><td>3</td><td>ON</td><td>ON</td><td>OFF</td><td>OFF</td><td>OFF</td></tr><tr><td>4</td><td>OFF</td><td>OFF</td><td>ON</td><td>OFF</td><td>OFF</td></tr><tr><td>5</td><td>ON</td><td>OFF</td><td>ON</td><td>OFF</td><td>OFF</td></tr><tr><td>6</td><td>OFF</td><td>ON</td><td>ON</td><td>OFF</td><td>OFF</td></tr><tr><td>7</td><td>ON</td><td>ON</td><td>ON</td><td>OFF</td><td>OFF</td></tr></tbody></table>

**SW5–SW8:** Reserved — leave OFF.

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## Wiring Notes

- **RS-485 Bus:** A(+) and B(−) to host controller RS-485 port. Daisy-chain up to 32 devices. Terminate last device with 120Ω.
- **Door 1 readers:** R1 (IN) and R2 (OUT). **Door 2 readers:** R3 (IN) and R4 (OUT).
- **Door strikes:** Relay 1 = Door 1, Relay 2 = Door 2. Relay 3–8 available for auxiliary outputs.
- **Door contacts:** Input 1 = Door 1 position, Input 2 = Door 2 position (use supervised EOL resistors).
- **Rex inputs:** Input 3 = Door 1 Rex, Input 4 = Door 2 Rex.

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## Resources

- [MP1502 Installation Guide (HID/Mercury)](https://www.hidglobal.com/sites/default/files/resource_files/plt-03021_a.2_-_mp1502_installation_guide.pdf)
- [Mercury Installation Assistant Utility (IAU)](https://downloadcenter.genetec.com/support/Firmware/Mercury/Mercury_IAU_FWTool_ver1043.zip)